subject:(Nanocomposites)

Oregon State University

1. Kelley, Jeremiah (Jeremiah Joseph). Nanocomposites incorporating cellulose nanocrystals with potential applications in lithium ion batteries.

Degree: MS, Material Science, 2011, Oregon State University

URL: http://hdl.handle.net/1957/21774

► Cellulose nanocrystals (CNCs) have received considerable attention over the last ten years because CNCs can be produced from renewable materials such as straw, wood, cotton,… (more)

Subjects/Keywords: nanocomposites; Nanocrystals

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APA (6^th Edition):

Kelley, J. (. J. (2011). Nanocomposites incorporating cellulose nanocrystals with potential applications in lithium ion batteries. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/21774

Chicago Manual of Style (16^th Edition):

Kelley, Jeremiah (Jeremiah Joseph). “Nanocomposites incorporating cellulose nanocrystals with potential applications in lithium ion batteries.” 2011. Masters Thesis, Oregon State University. Accessed February 26, 2021. http://hdl.handle.net/1957/21774.

MLA Handbook (7^th Edition):

Kelley, Jeremiah (Jeremiah Joseph). “Nanocomposites incorporating cellulose nanocrystals with potential applications in lithium ion batteries.” 2011. Web. 26 Feb 2021.

Vancouver:

Kelley J(J. Nanocomposites incorporating cellulose nanocrystals with potential applications in lithium ion batteries. [Internet] [Masters thesis]. Oregon State University; 2011. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/1957/21774.

Council of Science Editors:

Kelley J(J. Nanocomposites incorporating cellulose nanocrystals with potential applications in lithium ion batteries. [Masters Thesis]. Oregon State University; 2011. Available from: http://hdl.handle.net/1957/21774

Mississippi State University

2. Cho, Hosouk. CHEMICAL INCORPORATION OF POLYHEDRAL OLIGOMERIC SILSESQUIOXANE INTO THERMOSET MATRICES.

Degree: PhD, Chemistry, 2006, Mississippi State University

URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-07062006-183428/ ;

► A new class of organic-inorganic hybrid nanocomposites containing well-defined polyhedral oligomeric silsesquioxane (POSS) monomers, which have been copolymerized with organic monomers, were synthesized. Poly(isobutyl methacrylate-co-butanediol… (more)

▼ A new class of organic-inorganic hybrid nanocomposites containing well-defined polyhedral oligomeric silsesquioxane (POSS) monomers, which have been copolymerized with organic monomers, were synthesized. Poly(isobutyl methacrylate-co-butanediol dimethacrylate-co-3-methacrylylpropyl- heptaisobutyl(T8)polyhedral oligomeric silsesquioxane) (P(iBMA-co-BDMA-co-MA-POSS)) nanocomposites with different crosslink densities (BDMA loadings of 1, 3 and 5 wt%) and different MA-POSS percentages (5, 10, 15, 20 and 30 wt%) have been synthesized by radical-initiated terpolymerization. Linear P(iBMA-co-MA-POSS) copolymers were also prepared. Viscoelastic properties and morphologies were studied by DMTA (dynamic mechanical thermal analysis) and TEM (transmission electron microscopy). Two types of inorganic-organic hybrid polyhedral oligomeric silsesquioxane (POSS) / vinyl ester (VE) nanocomposites were synthesized. The first type contained a mixture of T8, T10 and T12 cages, each multifunctionalized with 3-methacrylylpropyl groups. The second type contained octa(3-methacrylylpropyldimethylsiloxyl)(T8)POSS. VE/POSS samples with weight ratios of 99/1, 97/3, 95/5, 90/10, 85/15 and 80/20 were prepared of each type. The nanocomposites were characterized by DMTA, TEM, scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (X-EDS), swelling, extraction and FT-IR. Three classes of inorganic-organic hybrid phenolic resin/polyhedral oligomeric silsesquioxane (POSS) nanocomposites were also synthesized via condensation polymerization. The POSS macromers employed included multifunctional dichloromethylsilylethylheptaisobutyl(T8)POSS, trisilanolheptaphenyl-POSS, and poly(phenylsilsesquioxane) uncured POSS. A nonfunctional octaisobutyl(T8)POSS was blended into the uncured phenolic resin followed by curing under the same conditions as those used for the other three nanocomposites classes. Phenolic/POSS samples with weight ratios of 99/1, 97/3, 95/5 and 90/10 were prepared of each type. Octaaminophenyl(T8)POSS and dodecaaminophenyl(T12)POSS were synthesized, characterized and then incorporated into two types of thermoset resins: (1) the bisphenol-F-based cyanate ester resin, PT-15, and (2) epoxy (Epon 828, Shell Chemical Corp.)/ 4,4?-diaminodiphenylmethane (DDM) resin, respectively, to make two series of nanocomposites. The sum of amino groups in both DDM and POSS were held in a 1:1 mole ratio to the epoxy groups. EPON-828/POSS/DDM (78.63/0/21.37, 77.48/5/17.52, 76.34/10/13.66, 74.05/20/5.95 and 72.28/27.72/0 wt/wt/wt compositions for both series) was prepared. PT-15/POSS composites (99/1, 97/3 and 95/5 wt/wt compositions for both types) were also prepared. Advisors/Committee Members: Charles U. Pittman (chair).

Subjects/Keywords: nanocomposites

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APA (6^th Edition):

Cho, H. (2006). CHEMICAL INCORPORATION OF POLYHEDRAL OLIGOMERIC SILSESQUIOXANE INTO THERMOSET MATRICES. (Doctoral Dissertation). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-07062006-183428/ ;

Chicago Manual of Style (16^th Edition):

Cho, Hosouk. “CHEMICAL INCORPORATION OF POLYHEDRAL OLIGOMERIC SILSESQUIOXANE INTO THERMOSET MATRICES.” 2006. Doctoral Dissertation, Mississippi State University. Accessed February 26, 2021. http://sun.library.msstate.edu/ETD-db/theses/available/etd-07062006-183428/ ;.

MLA Handbook (7^th Edition):

Cho, Hosouk. “CHEMICAL INCORPORATION OF POLYHEDRAL OLIGOMERIC SILSESQUIOXANE INTO THERMOSET MATRICES.” 2006. Web. 26 Feb 2021.

Vancouver:

Cho H. CHEMICAL INCORPORATION OF POLYHEDRAL OLIGOMERIC SILSESQUIOXANE INTO THERMOSET MATRICES. [Internet] [Doctoral dissertation]. Mississippi State University; 2006. [cited 2021 Feb 26]. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-07062006-183428/ ;.

Council of Science Editors:

Cho H. CHEMICAL INCORPORATION OF POLYHEDRAL OLIGOMERIC SILSESQUIOXANE INTO THERMOSET MATRICES. [Doctoral Dissertation]. Mississippi State University; 2006. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-07062006-183428/ ;

3. Liu, Huinan. Design, Fabrication and Evaluation of 2D to 3D nanostructured Ceramic/Polymer Composites for Orthopedic Regeneration and Controlled Drug Delivery.

Degree: PhD, Biomedical Engineering, 2008, Brown University

URL: https://repository.library.brown.edu/studio/item/bdr:237/

► Desirable cytocompatibility properties of nano-sized ceramics were combined with the tunable degradability and deformability of a select polymer (poly-lactide-co-glycolide, or PLGA) to optimize biological and… (more)

▼ Desirable cytocompatibility properties of nano-sized ceramics were combined with the tunable degradability and deformability of a select polymer (poly-lactide-co-glycolide, or PLGA) to optimize biological and mechanical properties for orthopedic tissue regeneration. Nanophase ceramics mimic the size scale of constituent components of natural bone and enhance the adsorption of proteins that mediate bone cell adhesion. Results have shown significantly promoted osteoblast (bone-forming cell) adhesion and long-term functions (alkaline phosphatase activity and calcium deposition) on nanophase ceramics compared to conventional (micron-scale) ceramics. Therefore, nano-titania particles were first dispersed in a model polymer (PLGA) matrix using sonication to imitate the nano-sized surface features and distribution of nano-ceramics in/on bone. Surface characteristics of the composites (such as topography, surface area and surface roughness) were studied. Importantly, results showed that osteoblast adhesion was the greatest when surface roughness values of the composites were closer to that of natural bone; this was mediated by controlling the dispersion of titania in PLGA. Moreover, this study demonstrated that the dispersion of nanophase titania in PLGA decreased the harmful acidic pH changes of PLGA as it degrades. From the perspective of mechanical properties, compared to agglomerated nano-titania in PLGA, well-dispersed nanophase titania in PLGA improved the tensile and compressive moduli and strength of these composites. In order to mimic the hierarchical structure of bone, a novel aerosol-based 3D printing technique was used to further fabricate nanostructured 3D ceramic/polymer composites. Osteoblast interactions with these 3D scaffolds provided evidence of an even further promoted bone cell infiltration into such 3D structures. Lastly, nanocomposites were used as novel drug delivery systems to promote bone growth. Specifically, a bone morphogenetic protein (BMP-7) derived peptide (DIF-7c) was loaded onto nanophase hydroxyapatite/PLGA composites by either covalent chemical attachment or physical adsorption. Results demonstrated that the model peptide was successfully immobilized onto nano-HA/PLGA composites using aminosilane chemistry. Moreover, a greater prolonged two-phase release profile was achieved using these nanocomposite-based drug delivery systems over single-phase (hydroxyapatite or PLGA) drug carriers. In summary, this dissertation demonstrated for the first time that nanophase ceramic/polymer composites are promising candidates as novel, drug-carrying orthopedic materials for more effective bone regeneration and bone disease treatment. Advisors/Committee Members: Webster, Thomas (director), Morgan, Jeffrey (reader), Mathiowitz, Edith (reader), Palmore, G. Tayhas (reader), Karp, Jeffrey (reader).

Subjects/Keywords: nanocomposites

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APA (6^th Edition):

Liu, H. (2008). Design, Fabrication and Evaluation of 2D to 3D nanostructured Ceramic/Polymer Composites for Orthopedic Regeneration and Controlled Drug Delivery. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:237/

Chicago Manual of Style (16^th Edition):

Liu, Huinan. “Design, Fabrication and Evaluation of 2D to 3D nanostructured Ceramic/Polymer Composites for Orthopedic Regeneration and Controlled Drug Delivery.” 2008. Doctoral Dissertation, Brown University. Accessed February 26, 2021. https://repository.library.brown.edu/studio/item/bdr:237/.

MLA Handbook (7^th Edition):

Liu, Huinan. “Design, Fabrication and Evaluation of 2D to 3D nanostructured Ceramic/Polymer Composites for Orthopedic Regeneration and Controlled Drug Delivery.” 2008. Web. 26 Feb 2021.

Vancouver:

Liu H. Design, Fabrication and Evaluation of 2D to 3D nanostructured Ceramic/Polymer Composites for Orthopedic Regeneration and Controlled Drug Delivery. [Internet] [Doctoral dissertation]. Brown University; 2008. [cited 2021 Feb 26]. Available from: https://repository.library.brown.edu/studio/item/bdr:237/.

Council of Science Editors:

Liu H. Design, Fabrication and Evaluation of 2D to 3D nanostructured Ceramic/Polymer Composites for Orthopedic Regeneration and Controlled Drug Delivery. [Doctoral Dissertation]. Brown University; 2008. Available from: https://repository.library.brown.edu/studio/item/bdr:237/

4. Suresh Kumar, Danikonda. Preparation and characterization of graphene oxide reinforced thermophastic starch based green nanocomposites;.

Degree: 2015, Osmania University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/42958

newline

Advisors/Committee Members: Madhukar, K.

Subjects/Keywords: Nanocomposites

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APA (6^th Edition):

Suresh Kumar, D. (2015). Preparation and characterization of graphene oxide reinforced thermophastic starch based green nanocomposites;. (Thesis). Osmania University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/42958

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Suresh Kumar, Danikonda. “Preparation and characterization of graphene oxide reinforced thermophastic starch based green nanocomposites;.” 2015. Thesis, Osmania University. Accessed February 26, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/42958.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Suresh Kumar, Danikonda. “Preparation and characterization of graphene oxide reinforced thermophastic starch based green nanocomposites;.” 2015. Web. 26 Feb 2021.

Vancouver:

Suresh Kumar D. Preparation and characterization of graphene oxide reinforced thermophastic starch based green nanocomposites;. [Internet] [Thesis]. Osmania University; 2015. [cited 2021 Feb 26]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/42958.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Suresh Kumar D. Preparation and characterization of graphene oxide reinforced thermophastic starch based green nanocomposites;. [Thesis]. Osmania University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/42958

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Addis Ababa University

5. ASEFA, ABADI. STUDIES OF NOVEL GRAPHENE NANORIBBON/ POLYANILINE NANOCOMPOSITES FOR THEIR APPLICATIONS IN SOLAR CELLS .

Degree: 2013, Addis Ababa University

URL: http://etd.aau.edu.et/dspace/handle/123456789/755

► Organic polymer nanocomposites blended with graphene nanostructures have recently attracted lot of scientific interest due to their novel heterojunction charge transport properties and for fabrication… (more)

Subjects/Keywords: graphene; nanocomposites

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APA (6^th Edition):

ASEFA, A. (2013). STUDIES OF NOVEL GRAPHENE NANORIBBON/ POLYANILINE NANOCOMPOSITES FOR THEIR APPLICATIONS IN SOLAR CELLS . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/755

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

ASEFA, ABADI. “STUDIES OF NOVEL GRAPHENE NANORIBBON/ POLYANILINE NANOCOMPOSITES FOR THEIR APPLICATIONS IN SOLAR CELLS .” 2013. Thesis, Addis Ababa University. Accessed February 26, 2021. http://etd.aau.edu.et/dspace/handle/123456789/755.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

ASEFA, ABADI. “STUDIES OF NOVEL GRAPHENE NANORIBBON/ POLYANILINE NANOCOMPOSITES FOR THEIR APPLICATIONS IN SOLAR CELLS .” 2013. Web. 26 Feb 2021.

Vancouver:

ASEFA A. STUDIES OF NOVEL GRAPHENE NANORIBBON/ POLYANILINE NANOCOMPOSITES FOR THEIR APPLICATIONS IN SOLAR CELLS . [Internet] [Thesis]. Addis Ababa University; 2013. [cited 2021 Feb 26]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/755.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

ASEFA A. STUDIES OF NOVEL GRAPHENE NANORIBBON/ POLYANILINE NANOCOMPOSITES FOR THEIR APPLICATIONS IN SOLAR CELLS . [Thesis]. Addis Ababa University; 2013. Available from: http://etd.aau.edu.et/dspace/handle/123456789/755

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

6. Pereira Nabais, Catarina. Contribution à l’étude de l’insertion électrochimique du lithium dans des nanocomposites graphite / Pb et graphite / Sn / Sb : Contribution to the study of lithium electrochemical insertion in graphite / Pb and graphite / Sn / Sb nanocomposites.

Degree: Docteur es, Physique et Chimie de la Matière et des Matériaux, 2008, Université Henri Poincaré – Nancy I

URL: http://www.theses.fr/2008NAN10029

►

Cette étude s’inscrit dans le cadre de la recherche de nouvelles électrodes négatives de batteries à ions lithium ayant des capacités supérieures à celles du… (more)

▼

Cette étude s’inscrit dans le cadre de la recherche de nouvelles électrodes négatives de batteries à ions lithium ayant des capacités supérieures à celles du graphite. La synthèse de nouveaux matériaux d’électrode, constitués de nanoparticules métalliques de plomb ou d’alliage étain/antimoine déposées sur le graphite, consiste à réduire des halogénures métalliques, en présence de graphite, à l’aide d’un hydrure alcalin (NaH ou LiH) activé par un alcoolate généré in situ. Les caractéristiques structurales et morphologiques des différents systèmes graphite – métal sont ici étudiées par DRX, MET et MEB afin de mieux comprendre les mécanismes susceptibles d’intervenir lors de l’insertion de lithium. Le système graphite - plomb est étudié dans le but d’appréhender l’importance des interactions graphite - métal sur les performances électrochimiques. En effet, le caractère métallique du plomb paraît conduire à un faible ancrage des nanoparticules au support carboné et à des performances médiocres de ces matériaux comme électrodes négatives de batteries Li-ion. L’investigation systématique des composites graphite/(1-x)Sn/(x)Sb en fonction de la teneur en antimoine montre que le caractère semi-métallique de l’antimoine conduit à une amélioration des propriétés mécaniques et d’ancrage des nanoparticules de l’alliage SnSb au graphite. L’étude structurale et morphologique en fonction de la nature de l’hydrure montre que LiH comparé à NaH conduit à des composites plus homogènes, dont les particules, mieux accrochées à la surface du graphite, présentent une meilleure tenue en cyclage et des capacités massiques plus élevées.

The main propose of this work is to investigate new anode materials possessing high mass capacity and being able of replacing graphite in Li-ion batteries. Electrode materials constituted of Pb and Sn/Sb alloy nanoparticles dispersed on the graphite surface, were obtained by chemical reduction of a metal halide, in the presence of graphite, using an alkoxide - activated hydride (NaH or LiH) as a reducing agent. To collect information about the structural and the morphological characteristics of graphite-metal powders, XRD, TEM and SEM analyses were performed. These results allowed to establish a relation between the powder sample characteristics and the encountered electrochemical performances (mass capacity and cycling stability) during lithium insertion / de-insertion process. Graphite – Pb system was used as model for studying the influence of metal-graphite interactions on the electrochemical behaviour of graphite-metal compounds. The results point out to a weak interaction between Pb metal particles and the graphite surface, which seems to be the main reason for the poor electrochemical performances observed during cycling. The systematic study of graphite/(1-x)Sn/(x)Sb composites as function of Sb content appears to show that antimony semi-metallic character is responsible for SnSb pinning on the graphite surface and improvement of their electrochemical properties. Structural and morphological studies…

Advisors/Committee Members: Billaud, Denis (thesis director).

Subjects/Keywords: Nanocomposites

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APA (6^th Edition):

Pereira Nabais, C. (2008). Contribution à l’étude de l’insertion électrochimique du lithium dans des nanocomposites graphite / Pb et graphite / Sn / Sb : Contribution to the study of lithium electrochemical insertion in graphite / Pb and graphite / Sn / Sb nanocomposites. (Doctoral Dissertation). Université Henri Poincaré – Nancy I. Retrieved from http://www.theses.fr/2008NAN10029

Chicago Manual of Style (16^th Edition):

Pereira Nabais, Catarina. “Contribution à l’étude de l’insertion électrochimique du lithium dans des nanocomposites graphite / Pb et graphite / Sn / Sb : Contribution to the study of lithium electrochemical insertion in graphite / Pb and graphite / Sn / Sb nanocomposites.” 2008. Doctoral Dissertation, Université Henri Poincaré – Nancy I. Accessed February 26, 2021. http://www.theses.fr/2008NAN10029.

MLA Handbook (7^th Edition):

Pereira Nabais, Catarina. “Contribution à l’étude de l’insertion électrochimique du lithium dans des nanocomposites graphite / Pb et graphite / Sn / Sb : Contribution to the study of lithium electrochemical insertion in graphite / Pb and graphite / Sn / Sb nanocomposites.” 2008. Web. 26 Feb 2021.

Vancouver:

Pereira Nabais C. Contribution à l’étude de l’insertion électrochimique du lithium dans des nanocomposites graphite / Pb et graphite / Sn / Sb : Contribution to the study of lithium electrochemical insertion in graphite / Pb and graphite / Sn / Sb nanocomposites. [Internet] [Doctoral dissertation]. Université Henri Poincaré – Nancy I; 2008. [cited 2021 Feb 26]. Available from: http://www.theses.fr/2008NAN10029.

Council of Science Editors:

Pereira Nabais C. Contribution à l’étude de l’insertion électrochimique du lithium dans des nanocomposites graphite / Pb et graphite / Sn / Sb : Contribution to the study of lithium electrochemical insertion in graphite / Pb and graphite / Sn / Sb nanocomposites. [Doctoral Dissertation]. Université Henri Poincaré – Nancy I; 2008. Available from: http://www.theses.fr/2008NAN10029

University of Texas – Austin

7. Spencer, Matthew Walter. Melt processed polymer-organoclay nanocomposites.

Degree: PhD, Chemical Engineering, 2011, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2011-12-4477

► Polymer nanocomposites with organoclay fillers offer improved properties and performance, providing opportunities for commercial applications. The key to significant property enhancement is to exfoliate the… (more)

▼ Polymer nanocomposites with organoclay fillers offer improved properties and performance, providing opportunities for commercial applications. The key to significant property enhancement is to exfoliate the individual organoclay platelets into the polymer matrix to utilize their high aspect ratio and modulus. The affinity between the polymer matrix and the organoclay is one of the most important factors for determining the exfoliation level. Although polar polymers, such as nylon 6, exfoliate the organoclay well, hydrophobic matrices, such as polyolefins, generally do not effectively exfoliate the organoclay. Thus, a significant part of this work investigates various routes to improve polyolefin-organoclay interactions and organoclay exfoliation in these systems. Nanocomposites formed from organoclay and blends of high density polyethylene and maleic anhydride-grafted high density polyethylene over the entire range of compositions were melt processed to obtain further insights into the 'compatiblizing' role of maleated polyolefins. The organoclay particle aspect ratio was found to initially increase drastically, reach a maximum, and slightly decrease with increased maleation. As the maleation level increases, the relative modulus increases initially and then levels off at higher loadings To a certain extent, the affinity between the polymer and the organoclay can be enhanced by optimizing the organoclay structure for a given polymer matrix. A silanized organoclay was investigated to determine if reduced agglomeration, improved exfoliation, and matrix reinforcement could be achieved in a polypropylene matrix without using a more costly compatibilizer. The silanized organoclay was found to be superior to the non-silanized precursor, but did not achieve the benefits obtained with a compatibilized matrix. Ionomer matrices have also been used as a means of improving organoclay exfoliation. This study examined the effects of ion type (K⁺, Na⁺), neutralization level, and melt index on the nanocomposite morphology and properties. The Na⁺ ionomers appear to have more favorable interactions with the organoclay. Exfoliation and matrix reinforcement tend to increase with decreased melt index and with increased neutralization, except at high levels. In these cases, it is possible that the additional exfoliation results in particles with lower aspect ratios. Composite properties are highly dependent on the particle aspect ratio. Several theories were used to predict the modulus and the thermal expansion coefficient of composites based on the filler aspect ratio. Novel two-population approaches were applied to enable the modeling of nanocomposites containing organoclay tactoids and single platelets, organoclay particles and glass fibers, or organoclay and elastomer particles. The quantitative agreement between the values predicted using experimentally determined particle aspect ratios and experimental modulus and thermal expansion was vastly improved using these methods. Advisors/Committee Members: Paul, Donald R. (advisor), Freeman, Benny D. (committee member), Ellison, Christopher J. (committee member), Kovar, Desiderio (committee member), Sanchez, Isaac C. (committee member).

Subjects/Keywords: Polyolefin; Nanocomposites

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APA (6^th Edition):

Spencer, M. W. (2011). Melt processed polymer-organoclay nanocomposites. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-12-4477

Chicago Manual of Style (16^th Edition):

Spencer, Matthew Walter. “Melt processed polymer-organoclay nanocomposites.” 2011. Doctoral Dissertation, University of Texas – Austin. Accessed February 26, 2021. http://hdl.handle.net/2152/ETD-UT-2011-12-4477.

MLA Handbook (7^th Edition):

Spencer, Matthew Walter. “Melt processed polymer-organoclay nanocomposites.” 2011. Web. 26 Feb 2021.

Vancouver:

Spencer MW. Melt processed polymer-organoclay nanocomposites. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2011. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/2152/ETD-UT-2011-12-4477.

Council of Science Editors:

Spencer MW. Melt processed polymer-organoclay nanocomposites. [Doctoral Dissertation]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-12-4477

Oregon State University

8. Shir Mohammadi, Meisam. Developing Design Model for Cellulose Nanocomposites.

Degree: PhD, Materials Science, 2016, Oregon State University

URL: http://hdl.handle.net/1957/59427

► Today nano scale materials are being used for wide range of applications. One promising topic in nano scale materials is using them for reinforcement of… (more)

Subjects/Keywords: Nanocomposites; Nanocomposites (Materials) – Mechanical properties – Mathematical models

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APA (6^th Edition):

Shir Mohammadi, M. (2016). Developing Design Model for Cellulose Nanocomposites. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/59427

Chicago Manual of Style (16^th Edition):

Shir Mohammadi, Meisam. “Developing Design Model for Cellulose Nanocomposites.” 2016. Doctoral Dissertation, Oregon State University. Accessed February 26, 2021. http://hdl.handle.net/1957/59427.

MLA Handbook (7^th Edition):

Shir Mohammadi, Meisam. “Developing Design Model for Cellulose Nanocomposites.” 2016. Web. 26 Feb 2021.

Vancouver:

Shir Mohammadi M. Developing Design Model for Cellulose Nanocomposites. [Internet] [Doctoral dissertation]. Oregon State University; 2016. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/1957/59427.

Council of Science Editors:

Shir Mohammadi M. Developing Design Model for Cellulose Nanocomposites. [Doctoral Dissertation]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59427

9. Vanmarcke, Audrey. Etude des relations élaboration, morphologie et comportement mécanique de mélanges et (nano)composites à base d’amidon : Relationships between processing, morphology and mechanical behaviour of starch based blends and (nano)composites.

Degree: Docteur es, Physique et science des matériaux, 2017, Université Lille I – Sciences et Technologies

URL: http://www.theses.fr/2017LIL10153

►

L’amidon, de par son faible coût et son abondance, est un candidat de choix dans le développement de nouveaux biopolymères. Cependant, les propriétés mécaniques de… (more)

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L’amidon, de par son faible coût et son abondance, est un candidat de choix dans le développement de nouveaux biopolymères. Cependant, les propriétés mécaniques de l’amidon thermoplastique (TPS) étant inférieures à celles des polymères pétro-sourcés, il est très souvent mélangé à une polyoléfine (PO) résultant en un mélange incompatible dont la morphologie doit être optimisée. L’objectif de cette étude est d’améliorer la compatibilité de mélanges PO/TPS en modulant les propriétés de l’interface via l’utilisation de polyoléfines de polarité différente d’une part, et d’autre part, par l’ajout de nanocharges à l’interface du mélange. Le suivi de l’évolution de la structure des mélanges par SAXS lors d’essais de traction in situ a montré que les premiers signes de décohésion apparaissent pour des taux de déformation plus élevés lorsque le TPS est mélangé avec une PO plus polaire, indiquant l’existence d’une meilleure interface. Des nanocharges de carbonate de calcium (CaCO3) de polarité différente ont ensuite été ajoutées aux mélanges. Selon leur polarité, les CaCO3 peuvent être localisées à l’interface ou dans la phase dispersée amylacée donnant lieu à une réduction ou à une augmentation de sa taille selon la nature de la PO. L’étude du comportement mécanique a montré une augmentation des contraintes avec la PO la plus polaire indépendamment de la localisation des CaCO3 dans le mélange. Ceci met en évidence le fait qu’une compatibilisation par ajout de nanocharges ne nécessite pas uniquement de contrôler la dispersion pour les placer à l’interface du mélange, il faut également prendre en compte les propriétés intrinsèques de chaque composant.

Among the various bio-based polymers considered as potential alternative of oil-based plastics, starch appears as one of the most interesting materials due to its wide availability and low cost. However, thermoplastic starch (TPS) exhibits poor mechanical properties as compared to synthetic polymers. One strategy used to overcome this drawback consists in blending TPS with a polyolefin (PO) resulting in an incompatible blend which morphology has to be optimized. In that frame, the main objective of this work is to enhance the mechanical performances of PO/TPS blends via a modulation of the interface properties by using polyolefins with different polarity and by adding nanoparticles to compatibilize the blends. The structural evolution of the blends induced by strain has been followed in situ by SAXS and revealed that the first signs of decohesion appear at higher strain rates when the TPS is mixed with the more polar polyolefin indicating a better adhesion in this blend. Calcium carbonate nanoparticles (CaCO3) with different polarities were then added to the blends. According to their polarity, the CaCO3 were located at the interface or in the dispersed phase composed of TPS, resulting in a refinement or a coarsening of the morphology depending on the polyolefin used. The study of the mechanical behavior shows an increase in the tensile properties for the more polar PO. These…

Advisors/Committee Members: Gaucher, Valérie (thesis director), Duquesne, Sophie (thesis director), Stoclet, Grégory (thesis director).

Subjects/Keywords: Nanocomposites; Compatibilisation; 668.42

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APA (6^th Edition):

Vanmarcke, A. (2017). Etude des relations élaboration, morphologie et comportement mécanique de mélanges et (nano)composites à base d’amidon : Relationships between processing, morphology and mechanical behaviour of starch based blends and (nano)composites. (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2017LIL10153

Chicago Manual of Style (16^th Edition):

Vanmarcke, Audrey. “Etude des relations élaboration, morphologie et comportement mécanique de mélanges et (nano)composites à base d’amidon : Relationships between processing, morphology and mechanical behaviour of starch based blends and (nano)composites.” 2017. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed February 26, 2021. http://www.theses.fr/2017LIL10153.

MLA Handbook (7^th Edition):

Vanmarcke, Audrey. “Etude des relations élaboration, morphologie et comportement mécanique de mélanges et (nano)composites à base d’amidon : Relationships between processing, morphology and mechanical behaviour of starch based blends and (nano)composites.” 2017. Web. 26 Feb 2021.

Vancouver:

Vanmarcke A. Etude des relations élaboration, morphologie et comportement mécanique de mélanges et (nano)composites à base d’amidon : Relationships between processing, morphology and mechanical behaviour of starch based blends and (nano)composites. [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2017. [cited 2021 Feb 26]. Available from: http://www.theses.fr/2017LIL10153.

Council of Science Editors:

Vanmarcke A. Etude des relations élaboration, morphologie et comportement mécanique de mélanges et (nano)composites à base d’amidon : Relationships between processing, morphology and mechanical behaviour of starch based blends and (nano)composites. [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2017. Available from: http://www.theses.fr/2017LIL10153

University of Alberta

10. Nelson-Fitzpatrick, Nathaniel. Novel materials for the design of cantilever transducers.

Degree: PhD, Department of Electrical and Computer Engineering, 2011, University of Alberta

URL: https://era.library.ualberta.ca/files/9k41zf62j

► Micro and nanocantilever structures have been used as transducers for a plethora of sensor applications. These transducer technologies have similar shapes, but the material properties… (more)

▼ Micro and nanocantilever structures have been used as transducers for a plethora of sensor applications. These transducer technologies have similar shapes, but the material properties and geometrical optimizations needed to improve sensitivity are rather different. This is a record of two different material and design strategies undertaken for static and resonant cantilever sensors. For resonant cantilever sensors we desire a material that is stiff and light. We fabricated silicon nanocantilevers using electron beam lithography and a cryogenic etching technique and assayed their resonance frequencies. The brittle nature of surface machined Si necessitated the move towards nanocantilevers made from glassy materials like Si3N4 and SiCN, which are difficult to deposit reliably in thicknesses below 50 nm. Alternatively, we fabricated and characterized atomic layer deposited (ALD) TiN films for nanocantilevers. We assayed chemical and physical characteristics of TiN films deposited between 120˚C and 300˚C with XPS, XRD, ellipsometry, and wafer bowing. We then fabricated nanoresonator beams out of TiN deposited at 200˚C. For static cantilever sensors we designed an Au-Ta nanocomposite alloy. Combining Au and Ta using magnetron co-sputtering we synthesized a material with low intrinsic stress while retaining the chemical affinity of Au to thiolized molecules. XRD, SEM, AFM, nanoindentation, stress measurements and nanocantilever resonance tests were performed to determine the bulk and surface characteristics of these Au-Ta alloys. The FCC <111> structure of Au was retained in films below 50 at.% Ta. Young's modulus was increased slightly by the addition of Ta while hardness was increased fivefold. The film's deposited stress was relieved upon inclusion of 5 at.% Ta. Chemical characteristics of Au-Ta films over the range of Pure Au to Au 40 at.% Ta was assessed using contact angle measurements, XPS, FTIR and cantilever measurements. As Ta concentration was increased the binding of 1-dodecanethiol was hindered. Low Ta films (5 and 10 at.% Ta) exhibited reduced but significant thiol binding, while higher concentrations displayed insignificant binding. We fabricated geometrically optimized cantilevers with a theoretical spring constant as low as 10.5 mN/m. The detection of dodecanethiol was demonstrated with these cantilevers, confirming intrinsic sensitivity to thiolized molecules.

Subjects/Keywords: nanocomposites; microcantilever; transducers

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APA (6^th Edition):

Nelson-Fitzpatrick, N. (2011). Novel materials for the design of cantilever transducers. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/9k41zf62j

Chicago Manual of Style (16^th Edition):

Nelson-Fitzpatrick, Nathaniel. “Novel materials for the design of cantilever transducers.” 2011. Doctoral Dissertation, University of Alberta. Accessed February 26, 2021. https://era.library.ualberta.ca/files/9k41zf62j.

MLA Handbook (7^th Edition):

Nelson-Fitzpatrick, Nathaniel. “Novel materials for the design of cantilever transducers.” 2011. Web. 26 Feb 2021.

Vancouver:

Nelson-Fitzpatrick N. Novel materials for the design of cantilever transducers. [Internet] [Doctoral dissertation]. University of Alberta; 2011. [cited 2021 Feb 26]. Available from: https://era.library.ualberta.ca/files/9k41zf62j.

Council of Science Editors:

Nelson-Fitzpatrick N. Novel materials for the design of cantilever transducers. [Doctoral Dissertation]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/9k41zf62j

University of Manchester

11. Albozahid, Muayad. Design of novel high modulus TPUs for nanocomposite applications.

Degree: PhD, 2018, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/design-of-novel-high-modulus-tpus-for-nanocomposite-applications(ce7989db-b70d-46a3-8c11-6793a6d9e235).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.740372

► This thesis focuses on designing thermoplastic nanocomposites with good mechanical, thermal and electrical properties. Thermoplastic nanocomposites, which are used in this work, are composed of… (more)

▼ This thesis focuses on designing thermoplastic nanocomposites with good mechanical, thermal and electrical properties. Thermoplastic nanocomposites, which are used in this work, are composed of thermoplastic polyurethane (TPU) matrices and graphene nanofillers (GNFs). TPUs were synthesised with large ratios of hard segments (HS), including 60, 70 and 80 Wt. % HS. The influences of HS content and annealing treatment at 80 °C on the thermal, electrical and mechanical properties of TPUs and TPUs/GNFs samples have been investigated. The crystallinity, Tg, tensile strength, yield strength, and tensile modulus of all pure TPU samples are seen to increase after annealing treatment due to microphase separation. This also depends on the HS content in order to achieve better properties with various annealing times. The nanofillers include graphene nanoplatelets (GNP), graphene oxide (GO), and reduced graphene oxide (rGO). Various dispersion routes have been utilised to achieve better dispersion and distribution of the nanofillers. In-situ polymerisation, melt-compounding and solution-mixing techniques have been used to study dispersion effects and further moulding by injection moulding to prepare new TPU nanocomposites. Filler-matrix and filler-filler interfaces significantly influence the final performance of TPU nanocomposites. There is therefore a balance to be struck in the design of graphene-based TPU nanocomposites between the ability to achieve higher loadings of reinforcement and the reduction in effective Youngâs modulus of the reinforcement as the number of layers in the nanofillers is increased. Effective stress transfer is achieved as a result of both dispersion and interfacial interaction. It has been demonstrated that graphene plays a reinforcing role in nanocomposites through its effective modulus as well as bonding with TPU phases. The first nanofiller studied is GNP, which shows good mechanical, thermal and electrical properties. The in-situ polymerisation approach was found to be the best dispersion method compared to melt compounding and solution mixing, as the optimum properties of GNP nanofillers can be achieved in the TPU/70 HS matrix. The TPU/70 HS had higher values compared to both TPU/60 HS and TPU/80 HS. However, the preparation of GO and rGO incorporating TPU/70 HS was not successfully synthesised due to the suppression of chain growth during polymerisation. Thus, the melt-compounding process was used instead for both GO- and rGO-based TPU matrices. TPU/70/GO nanocomposites displayed better mechanical performance compared to TPU/70/rGO nanocomposites, as a result of greater interaction between TPUs chains and fillers surfaces. It was found that the percolation thresholds for GO- and rGO-filled nanocomposites were significantly lower than that of GNP-filled nanocomposites due to their higher aspect ratio. Annealing treatment showed lower mechanical properties of TPU nanocomposite samples compared to non-annealed TPU nanocomposite samples, resulting from disruption of phase separation and restacking…

Subjects/Keywords: 620; TPUs nanocomposites

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Albozahid, M. (2018). Design of novel high modulus TPUs for nanocomposite applications. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/design-of-novel-high-modulus-tpus-for-nanocomposite-applications(ce7989db-b70d-46a3-8c11-6793a6d9e235).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.740372

Chicago Manual of Style (16^th Edition):

Albozahid, Muayad. “Design of novel high modulus TPUs for nanocomposite applications.” 2018. Doctoral Dissertation, University of Manchester. Accessed February 26, 2021. https://www.research.manchester.ac.uk/portal/en/theses/design-of-novel-high-modulus-tpus-for-nanocomposite-applications(ce7989db-b70d-46a3-8c11-6793a6d9e235).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.740372.

MLA Handbook (7^th Edition):

Albozahid, Muayad. “Design of novel high modulus TPUs for nanocomposite applications.” 2018. Web. 26 Feb 2021.

Vancouver:

Albozahid M. Design of novel high modulus TPUs for nanocomposite applications. [Internet] [Doctoral dissertation]. University of Manchester; 2018. [cited 2021 Feb 26]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/design-of-novel-high-modulus-tpus-for-nanocomposite-applications(ce7989db-b70d-46a3-8c11-6793a6d9e235).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.740372.

Council of Science Editors:

Albozahid M. Design of novel high modulus TPUs for nanocomposite applications. [Doctoral Dissertation]. University of Manchester; 2018. Available from: https://www.research.manchester.ac.uk/portal/en/theses/design-of-novel-high-modulus-tpus-for-nanocomposite-applications(ce7989db-b70d-46a3-8c11-6793a6d9e235).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.740372

University of Manchester

12. Innes, James. Graphene nanoplatelet reinforced elastomers for the Oil & Gas Industry.

Degree: 2019, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:320567

► Graphene related materials have recently become of great interest for polymer reinforcement owing to their high Youngâ€™s modulus and aspect ratio. These properties, as well… (more)

▼ Graphene related materials have recently become of great interest for polymer reinforcement owing to their high Youngâ€™s modulus and aspect ratio. These properties, as well as good electrical and thermal conductivity, have led to a surge in publications for nanocomposites with multifunctional properties. Historically, carbon black has been the workhorse of the elastomer industry, offering low cost, good mechanical reinforcement and versatility through different black grades. However, carbon black is not necessarily the ideal filler for all applications. For example, carbon black reinforced elastomers suffer from rapid gas decompression damage when applied to the oil and gas industry. Rapid gas decompression leads to blistering and cracking of elastomer seals because sudden pressure changes cause gases dissolved within the elastomer to expand. In order to understand how these new graphene fillers affect elastomer reinforcement and how they differ from carbon black, a number of graphene nanoplatelet reinforced NBR compounds were produced and compared with the carbon black equivalent. Mechanical testing demonstrated that the GnPs reinforce the NBR matrix more effectively than CB in terms of modulus, hardness and tear strength. Furthermore, GnPs help maintain the elastomers high strain at break, whereas the inclusion of carbon black leads to a reduction in elongation at break. However, the ultimate tensile strength for GnP-NBR and CB-NBR is similar at equivalent loadings. The modulus and tear energy were modelled using elastomer theory to evaluate how the GnPs give these improved mechanical properties compared with carbon black. Characterisation by Raman spectroscopy, SEM and AFM has been used alongside the mechanical testing in order to understand how the shape of the filler may affect reinforcement. The aspect ratio of the filler has been identified as a crucial parameter in the elastomer reinforcement. Transport properties of the composites were measured in order to suggest the suitability of the filler for oil and gas applications. The results suggest that graphene nanoplatelets may have a future in the elastomer industry offering potential for new and multifunctional properties. Opportunities for further work have been identified including suggestions for future work. Advisors/Committee Members: KINLOCH, IAN IA, Young, Robert, Kinloch, Ian.

Subjects/Keywords: nanocomposites; elastomer; graphene

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Innes, J. (2019). Graphene nanoplatelet reinforced elastomers for the Oil & Gas Industry. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:320567

Chicago Manual of Style (16^th Edition):

Innes, James. “Graphene nanoplatelet reinforced elastomers for the Oil & Gas Industry.” 2019. Doctoral Dissertation, University of Manchester. Accessed February 26, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:320567.

MLA Handbook (7^th Edition):

Innes, James. “Graphene nanoplatelet reinforced elastomers for the Oil & Gas Industry.” 2019. Web. 26 Feb 2021.

Vancouver:

Innes J. Graphene nanoplatelet reinforced elastomers for the Oil & Gas Industry. [Internet] [Doctoral dissertation]. University of Manchester; 2019. [cited 2021 Feb 26]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:320567.

Council of Science Editors:

Innes J. Graphene nanoplatelet reinforced elastomers for the Oil & Gas Industry. [Doctoral Dissertation]. University of Manchester; 2019. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:320567

Kansas State University

13. Manepalli, Pavan Harshit. Use of thermoplastic starch in poly(lactic acid)/poly(butylene adipate-co-terephthalate) based nanocomposites for bio-based food packaging.

Degree: PhD, Department of Grain Science and Industry, 2019, Kansas State University

URL: http://hdl.handle.net/2097/39378

► Poly(lactic acid) (PLA) is the most common bio-based & compostable polymer available commercially that is cost competitive and combines a range of desirable properties like… (more)

▼ Poly(lactic acid) (PLA) is the most common bio-based & compostable polymer available commercially that is cost competitive and combines a range of desirable properties like melt processability, high strength and modulus. The films made from this aliphatic polyester tend to be brittle which can be overcome by blending PLA with another bio-based polymer with high flexibility poly(butylene adipate-co-terephthalate) (PBAT), but the resultant blend is only biodegradable in composting conditions. The primary focus of this study was incorporation of thermoplastic starch (TPS) in PLA/PBAT blends to increase the rate of biodegradability and decrease the cost. In the first part of this study, as a preliminary step only PLA/PBAT blends were investigated along with nanofiller nanocrystalline cellulose (NCC) as a nanofiller for enhancing mechanical and barrier properties. Melt extrusion was used for preparation of nanocomposites and 200 microns thick films were formed by melt pressing. PBAT enhanced elongation but NCC did not have any positive impact on the mechanical and barrier properties of the nanocomposites as NCC was aggregated in the polymer matrix due to the difference in polarity based on the hydrophilic nature of the nanofiller and hydrophobic nature of the polymer matrix. In the second part of study, up to 40%TPS was blended along with the PLA/PBAT/NCC nanocomposites. Joncryl (0.5%) was used as a compatibilizer. TPS addition decreased the mechanical and barrier properties (Tensile strength (TS) = 15- 30 MPa, Elongation at break (EB) = 6-12%, Water vapor permeability (WVP) = 1.6-8.3 g.mm/kPa.h.m²), although addition of NCC helped in increasing the TS and decreasing the WVP. Dispersion of NCC improved with the addition of hydrophilic TPS. Analytical techniques including transmission electron microscopy, fourier-transform infrared spectroscopy, differential scanning calorimetry were used to study the polymer-polymer and polymer-nanofiller interactions. Optimization study of PLA/PBAT/TPS/NCC nanocomposites was done using mixture response surface methods. Quadratic models with good predicted R² (between 84.3% and 97.59%) were developed for all the responses. Optimization study was done that could yield films with optimum properties comparable to commercial plastics and maximizing the level of TPS. Films with optimum properties (TS = 29.5 MPa, EB = 12%, WVP = 1.99 g.mm/kPa.h.m²) were predicted at levels of 64.3% PLA, 14.5% PBAT, 18% TPS and 2.6% NCC along with 0.5% Joncryl. The improved mechanical and barrier performance suggested that PLA/PBAT/TPS/NCC nanocomposites have potential use in food packaging applications. In the final phase of study, mathematical modeling was used to understand the influence of nanofiller (NCC) on the mechanical and barrier properties of the nanocomposites. The modified Halpin-Tsai equation was used to model the elastic modulus of the nanocomposites, while the modified Nielsen equation was used to model the WVP as a function of nanofiller content, geometry, strength and interactions with… Advisors/Committee Members: Sajid Alavi.

Subjects/Keywords: Food Packaging; Nanocomposites

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Manepalli, P. H. (2019). Use of thermoplastic starch in poly(lactic acid)/poly(butylene adipate-co-terephthalate) based nanocomposites for bio-based food packaging. (Doctoral Dissertation). Kansas State University. Retrieved from http://hdl.handle.net/2097/39378

Chicago Manual of Style (16^th Edition):

Manepalli, Pavan Harshit. “Use of thermoplastic starch in poly(lactic acid)/poly(butylene adipate-co-terephthalate) based nanocomposites for bio-based food packaging.” 2019. Doctoral Dissertation, Kansas State University. Accessed February 26, 2021. http://hdl.handle.net/2097/39378.

MLA Handbook (7^th Edition):

Manepalli, Pavan Harshit. “Use of thermoplastic starch in poly(lactic acid)/poly(butylene adipate-co-terephthalate) based nanocomposites for bio-based food packaging.” 2019. Web. 26 Feb 2021.

Vancouver:

Manepalli PH. Use of thermoplastic starch in poly(lactic acid)/poly(butylene adipate-co-terephthalate) based nanocomposites for bio-based food packaging. [Internet] [Doctoral dissertation]. Kansas State University; 2019. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/2097/39378.

Council of Science Editors:

Manepalli PH. Use of thermoplastic starch in poly(lactic acid)/poly(butylene adipate-co-terephthalate) based nanocomposites for bio-based food packaging. [Doctoral Dissertation]. Kansas State University; 2019. Available from: http://hdl.handle.net/2097/39378

University of Texas – Austin

14. Wu, Hao, Doctorate in materials science and engineering. Flame retardant nylon 6 nanocomposite fibers : processing and characterization.

Degree: PhD, Materials science and engineering, 2016, University of Texas – Austin

URL: http://hdl.handle.net/2152/44027

► One type of engineering thermoplastic polymers that has significant commercial application is nylon. However, flammability and melt dripping is a major problem for polymers like… (more)

▼ One type of engineering thermoplastic polymers that has significant commercial application is nylon. However, flammability and melt dripping is a major problem for polymers like nylon 6 because it can cause fire to spread to other flammable objects and escalate the fire in a short amount of time. Although high performance inherently flame-retardant (FR) fibers have been discovered and various durable FR finishes for nylon have been developed, cost-effective flame retardant nylon and nylon blend fabrics remain a challenge. The goal of this research is to develop non-drip inherently FR nylon 6 fibers as a cost-effective alternative for use in high volume FR fabrics. In this dissertation, a cost effective alternative of producing non-drip inherently flame retardant nylon 6 fibers with balanced performances was developed based on polymer nanocomposite systems incorporating intumescent FR and nanoclay additives. Nanoclay was added to the system to reduce FR particle loading and capitalize on the synergistic effect between nanoclay and intumescent additives. Adequate dispersion of the additives with exfoliation of the nanoclay platelets was observed using TEM and XRD. Injection molding was used as a tool for screening the performance of the nanocomposite formulations in bulk form before the fiber spinning process. Results of injection molded FR PA6 nanocomposites suggest that although a good FR performance could be achieved, mechanical properties, especially ductility, were significantly compromised. To solve this problem, rubber toughening was achieved using a thermoplastic elastomer with significant success in recovering material ductility without compromising FR performance. Ultra-sonication of the FR additives prior the fiber spinning could effectively reduce the FR particle size distribution. Single fiber tensile tests show that PA6/FR/elastomer/nanoclay formulation is able to improve both the tenacity and elongation at break from the original PA6/FR system. Moreover, flammability tests suggest that the nanocomposite FR fibers have significantly lower heat release properties and are able to retain a fibrous shape after combustion indicating the non-dripping property. Therefore, our experiments have yielded improved non-drip FR properties in PA6 through the infusion of nanoclay and non-halogenated intumescent particles (FR) via co-rotating twin-screw extrusion. One major implication of these results is that with the new non-drip FR nylon 6 fiber, it would be possible to achieve blends with higher nylon content than customary and not compromise the FR performance of the fabric, thus providing a cost effective solution for high-volume applications. Advisors/Committee Members: Krifa, Mourad (advisor), Koo, Joseph H. (advisor), Li, Wei (committee member), Ellison, Christopher J (committee member), Chen, Jonathan Y (committee member).

Subjects/Keywords: Flame retardant; Nanocomposites

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APA (6^th Edition):

Wu, Hao, D. i. m. s. a. e. (2016). Flame retardant nylon 6 nanocomposite fibers : processing and characterization. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/44027

Chicago Manual of Style (16^th Edition):

Wu, Hao, Doctorate in materials science and engineering. “Flame retardant nylon 6 nanocomposite fibers : processing and characterization.” 2016. Doctoral Dissertation, University of Texas – Austin. Accessed February 26, 2021. http://hdl.handle.net/2152/44027.

MLA Handbook (7^th Edition):

Wu, Hao, Doctorate in materials science and engineering. “Flame retardant nylon 6 nanocomposite fibers : processing and characterization.” 2016. Web. 26 Feb 2021.

Vancouver:

Wu, Hao Dimsae. Flame retardant nylon 6 nanocomposite fibers : processing and characterization. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2016. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/2152/44027.

Council of Science Editors:

Wu, Hao Dimsae. Flame retardant nylon 6 nanocomposite fibers : processing and characterization. [Doctoral Dissertation]. University of Texas – Austin; 2016. Available from: http://hdl.handle.net/2152/44027

University of Oklahoma

15. Demirtas, Mehmet Selim. Fabrication, Characterization and Modeling of Aligned Polyacrylonitrile-Based Electrospun Carbon Nanofibers.

Degree: PhD, 2018, University of Oklahoma

URL: http://hdl.handle.net/11244/301380

► Electrospinning is widely used to produce carbon nanofiber from polyacrylonitrile (PAN). The alignment of fibers may vary depending on electrospinning condition. In this study, an… (more)

▼ Electrospinning is widely used to produce carbon nanofiber from polyacrylonitrile (PAN). The alignment of fibers may vary depending on electrospinning condition. In this study, an electrospinning setup is developed to fabricate aligned and uniform yarns from PAN, employing an adjustable rotating disc. Effects of relative humidity (RH) on fiber diameter and mechanical properties of electrospun, stabilized and carbonized nanofibers are investigated. Average fiber diameter increases from 365 nm to 602 nm by increasing RH 22% to 60%. Additionally, mechanical properties are reduced by increasing RH. Nanofibers are generated at low RH show poor mechanical properties. 22% RH yields the best mechanical properties. Collector geometry and rotating speed influence electrospun nanofiber alignment. The nanofiber diameter distribution, porosity, orientation, and mechanical properties are investigated. A unique approach is adopted to test the nanofiber films in tension using a dynamic mechanical analyzer (DMA). Furthermore, 2-dimensional FEM analysis is performed to investigate electric field distribution around the collector. It is observed that the speed of the rotating disc can help improve the alignment of nanofibers in the film. It is also absolved that the electric field is more intense and uniform on the collector surface for wire and mesh type collectors compared to foil collectors. Nanofibers electrospun with wire type collector show the highest alignment due to the intense uniform electric field and tensile properties of carbonized nanofiber films. Electrode geometry is another electrospinning element that influences the fiber alignment. Three different tip electrode systems are investigated; single blind needle, flash needle, where the needle is located in a copper cylinder and completely flush with the edge of the cylinder, and protruded needle, where the needle passes through a copper cylinder and protrudes 0.5 mm past the edge of the cylinder. Similarly, 2D FEM is studied to obtain electric field distribution of the needle region. The alignment and diameter of nanofibers vary by changes in the needle system when all other electrospinning parameters are kept constant. The flash and protruded type of electrode yields more uniform and better fiber alignment. Furthermore, Taylor cone and straight jet formation dependence on flow rate and applied voltage are investigated using a high speed camera. an average fiber diameter of 422 nm is obtained for needle type while 389 nm is obtained for the protruded needle and fiber alignment was also improved with varying electrode types. Stabilization conditions influence mechanical properties of carbon nanofibers. The effects of hot drawing of electrospun PAN nanofiber yarns and pre-stress during stabilization on the mechanical properties of stabilized yarns is investigated. The as-spun PAN nanofibers are mechanically stretched to stretch ratios (λ) of 1, 2 and 3 at 135 °C and subsequently stabilized at 260°C in air for 180 min under different mechanical pre-stress conditions, up… Advisors/Committee Members: Saha, Mrinal C. (advisor), Altan, M. Cengiz (advisor), Liu, Yingtao (committee member), Raman, Shivakumar (committee member), Siddique, Zahed (committee member).

Subjects/Keywords: Nanocomposites; Electrospinning; Nanofibers

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Demirtas, M. S. (2018). Fabrication, Characterization and Modeling of Aligned Polyacrylonitrile-Based Electrospun Carbon Nanofibers. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/301380

Chicago Manual of Style (16^th Edition):

Demirtas, Mehmet Selim. “Fabrication, Characterization and Modeling of Aligned Polyacrylonitrile-Based Electrospun Carbon Nanofibers.” 2018. Doctoral Dissertation, University of Oklahoma. Accessed February 26, 2021. http://hdl.handle.net/11244/301380.

MLA Handbook (7^th Edition):

Demirtas, Mehmet Selim. “Fabrication, Characterization and Modeling of Aligned Polyacrylonitrile-Based Electrospun Carbon Nanofibers.” 2018. Web. 26 Feb 2021.

Vancouver:

Demirtas MS. Fabrication, Characterization and Modeling of Aligned Polyacrylonitrile-Based Electrospun Carbon Nanofibers. [Internet] [Doctoral dissertation]. University of Oklahoma; 2018. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/11244/301380.

Council of Science Editors:

Demirtas MS. Fabrication, Characterization and Modeling of Aligned Polyacrylonitrile-Based Electrospun Carbon Nanofibers. [Doctoral Dissertation]. University of Oklahoma; 2018. Available from: http://hdl.handle.net/11244/301380

University of Manchester

16. Innes, James. Graphene nanoplatelet reinforced elastomers for the oil & gas industry.

Degree: PhD, 2019, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/graphene-nanoplatelet-reinforced-elastomers-for-the-oil – gas-industry(6b3dd153-cd1d-4b62-95c9-0f851b98f357).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816310

► Graphene related materials have recently become of great interest for polymer reinforcement owing to their high Young's modulus and aspect ratio. These properties, as well… (more)

▼ Graphene related materials have recently become of great interest for polymer reinforcement owing to their high Young's modulus and aspect ratio. These properties, as well as good electrical and thermal conductivity, have led to a surge in publications for nanocomposites with multifunctional properties. Historically, carbon black has been the workhorse of the elastomer industry, offering low cost, good mechanical reinforcement and versatility through different black grades. However, carbon black is not necessarily the ideal filler for all applications. For example, carbon black reinforced elastomers suffer from rapid gas decompression damage when applied to the oil and gas industry. Rapid gas decompression leads to blistering and cracking of elastomer seals because sudden pressure changes cause gases dissolved within the elastomer to expand. In order to understand how these new graphene fillers affect elastomer reinforcement and how they differ from carbon black, a number of graphene nanoplatelet reinforced NBR compounds were produced and compared with the carbon black equivalent. Mechanical testing demonstrated that the GnPs reinforce the NBR matrix more effectively than CB in terms of modulus, hardness and tear strength. Furthermore, GnPs help maintain the elastomers high strain at break, whereas the inclusion of carbon black leads to a reduction in elongation at break. However, the ultimate tensile strength for GnP-NBR and CB-NBR is similar at equivalent loadings. The modulus and tear energy were modelled using elastomer theory to evaluate how the GnPs give these improved mechanical properties compared with carbon black. Characterisation by Raman spectroscopy, SEM and AFM has been used alongside the mechanical testing in order to understand how the shape of the filler may affect reinforcement. The aspect ratio of the filler has been identified as a crucial parameter in the elastomer reinforcement. Transport properties of the composites were measured in order to suggest the suitability of the filler for oil and gas applications. The results suggest that graphene nanoplatelets may have a future in the elastomer industry offering potential for new and multifunctional properties. Opportunities for further work have been identified including suggestions for future work.

Subjects/Keywords: nanocomposites; elastomer; graphene

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Innes, J. (2019). Graphene nanoplatelet reinforced elastomers for the oil & gas industry. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/graphene-nanoplatelet-reinforced-elastomers-for-the-oil – gas-industry(6b3dd153-cd1d-4b62-95c9-0f851b98f357).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816310

Chicago Manual of Style (16^th Edition):

Innes, James. “Graphene nanoplatelet reinforced elastomers for the oil & gas industry.” 2019. Doctoral Dissertation, University of Manchester. Accessed February 26, 2021. https://www.research.manchester.ac.uk/portal/en/theses/graphene-nanoplatelet-reinforced-elastomers-for-the-oil – gas-industry(6b3dd153-cd1d-4b62-95c9-0f851b98f357).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816310.

MLA Handbook (7^th Edition):

Innes, James. “Graphene nanoplatelet reinforced elastomers for the oil & gas industry.” 2019. Web. 26 Feb 2021.

Vancouver:

Innes J. Graphene nanoplatelet reinforced elastomers for the oil & gas industry. [Internet] [Doctoral dissertation]. University of Manchester; 2019. [cited 2021 Feb 26]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/graphene-nanoplatelet-reinforced-elastomers-for-the-oil – gas-industry(6b3dd153-cd1d-4b62-95c9-0f851b98f357).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816310.

Council of Science Editors:

Innes J. Graphene nanoplatelet reinforced elastomers for the oil & gas industry. [Doctoral Dissertation]. University of Manchester; 2019. Available from: https://www.research.manchester.ac.uk/portal/en/theses/graphene-nanoplatelet-reinforced-elastomers-for-the-oil – gas-industry(6b3dd153-cd1d-4b62-95c9-0f851b98f357).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.816310

17. Ghebache, Zohra. Contribution à l'élaboration de Nano-composites à Base de Polymère Conducteur.

Degree: 2016, Université M'Hamed Bougara Boumerdès

URL: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2895

138 p. :ill.; 30 cm

L'objectif du présent travail est la synthèse et caractérisation des nanocomposites polymères conducteurs (transducteurs partie sensible de biocapteurs) à base de poly(aniline) dopée par un acide solide (zéolithe HY) greffé avec différents

Subjects/Keywords: Nanocomposites; Nanoparticules; Polymères conducteurs

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ghebache, Z. (2016). Contribution à l'élaboration de Nano-composites à Base de Polymère Conducteur. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2895

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ghebache, Zohra. “Contribution à l'élaboration de Nano-composites à Base de Polymère Conducteur.” 2016. Thesis, Université M'Hamed Bougara Boumerdès. Accessed February 26, 2021. http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2895.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ghebache, Zohra. “Contribution à l'élaboration de Nano-composites à Base de Polymère Conducteur.” 2016. Web. 26 Feb 2021.

Vancouver:

Ghebache Z. Contribution à l'élaboration de Nano-composites à Base de Polymère Conducteur. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2016. [cited 2021 Feb 26]. Available from: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2895.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ghebache Z. Contribution à l'élaboration de Nano-composites à Base de Polymère Conducteur. [Thesis]. Université M'Hamed Bougara Boumerdès; 2016. Available from: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2895

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Mississippi State University

18. Yu, Jaesang. MICROMECHANICALLY BASED MULTISCALE MATERIAL MODELING OF POLYMER NANOCOMPOSITES.

Degree: PhD, Aerospace Engineering, 2011, Mississippi State University

URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04012011-131653/ ;

► The Effective Continuum Micromechanics Analysis Code (EC-MAC) was developed for predicting effective properties of composites containing multiple distinct nanoheterogeneities (fibers, spheres, platelets, voids, etc.)… (more)

▼ The Effective Continuum Micromechanics Analysis Code (EC-MAC) was developed for predicting effective properties of composites containing multiple distinct nanoheterogeneities (fibers, spheres, platelets, voids, etc.) each with an arbitrary number of coating layers based upon either the modified Mori-Tanaka method (MTM) and self consistent method (SCM). This code was used to investigate the effect of carbon nanofiber morphology (i.e., hollow versus solid cross-section), nanofiber waviness, and both nanofiber-resin interphase properties and dimensions on bulk nanocomposite elastic moduli. For a given nanofiber axial force-displacement relationship, the elastic modulus for hollow nanofibers can significantly exceed that for solid nanofibers resulting in notable differences in bulk nanocomposite properties. The development of a nanofiber-resin interphase had a notable effect on the bulk elastic moduli. Consistent with results from the literature, small degrees of nanofiber waviness resulted in a significant decrease in effective composite properties. Key aspects of nanofiber morphology were characterized using transmission electron microscopy (TEM) images for VGCNF/vinyl ester (VE) nanocomposites. Three-parameter Weibull probability density functions were generated to describe the statistical variation in nanofiber outer diameters, wall thicknesses, relative wall thicknesses, visible aspect ratios, and visible waviness ratios. Such information could be used to establish more realistic nanofiber moduli and strengths obtained from nanofiber tensile tests, as well as to develop physically motivated computational models for predicting nanocomposite behavior. This study represents one of the first attempts to characterize the distribution of VGCNF features in real thermoset nanocomposites. In addition, the influence of realistic nanoreinforcement geometries, distinct elastic properties, and orientations on the effective elastic moduli was addressed. The effect of multiple distinct heterogeneities, including voids, on the effective elastic moduli was investigated. For the composites containing randomly oriented wavy vapor grown carbon nanofibers (VGCNFs) and voids, the predicted moduli captured the essential character of the experimental data, where the volume fraction of voids was approximated as a nonlinear function of the volume fraction of reinforcements. This study should facilitate the development of multiscale materials design by providing insight into the relationships between nanomaterial morphology and properties across multiple spatial scales that lead to improved macroscale performance. Advisors/Committee Members: Thomas E. Lacy (chair), Charles U. Pittman (committee member), Hossein Toghiani (committee member), Judith A. Schneider (committee member), Rani W. Sullivan (committee member).

Subjects/Keywords: polymer nanocomposites; multiscale modeling; micromechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yu, J. (2011). MICROMECHANICALLY BASED MULTISCALE MATERIAL MODELING OF POLYMER NANOCOMPOSITES. (Doctoral Dissertation). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-04012011-131653/ ;

Chicago Manual of Style (16^th Edition):

Yu, Jaesang. “MICROMECHANICALLY BASED MULTISCALE MATERIAL MODELING OF POLYMER NANOCOMPOSITES.” 2011. Doctoral Dissertation, Mississippi State University. Accessed February 26, 2021. http://sun.library.msstate.edu/ETD-db/theses/available/etd-04012011-131653/ ;.

MLA Handbook (7^th Edition):

Yu, Jaesang. “MICROMECHANICALLY BASED MULTISCALE MATERIAL MODELING OF POLYMER NANOCOMPOSITES.” 2011. Web. 26 Feb 2021.

Vancouver:

Yu J. MICROMECHANICALLY BASED MULTISCALE MATERIAL MODELING OF POLYMER NANOCOMPOSITES. [Internet] [Doctoral dissertation]. Mississippi State University; 2011. [cited 2021 Feb 26]. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04012011-131653/ ;.

Council of Science Editors:

Yu J. MICROMECHANICALLY BASED MULTISCALE MATERIAL MODELING OF POLYMER NANOCOMPOSITES. [Doctoral Dissertation]. Mississippi State University; 2011. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04012011-131653/ ;

19. Coelho, Caio Parra Dantas. Obtenção e caracterização de nanocompósitos de poliestireno e argilas esmectíticas.

Degree: Mestrado, Engenharia Metalúrgica e de Materiais, 2008, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/3/3133/tde-05082009-165838/ ;

►

Neste trabalho foram preparados nanocompósitos de Poliestireno (PS) e argilas organofílicas. As argilas, inicialmente hidrofílicas, foram modificadas organicamente utilizando três sais quaternários de amônio diferentes:… (more)

▼

Neste trabalho foram preparados nanocompósitos de Poliestireno (PS) e argilas organofílicas. As argilas, inicialmente hidrofílicas, foram modificadas organicamente utilizando três sais quaternários de amônio diferentes: Cloreto de hexadecil trimetil amônio (CTAC), Cloreto de alquil dimetil benzil amônio (Dodigen) e Cloreto de dimetil dioctadecil amônio (Praepagen). A argila organofílica Cloisite 20A foi também utilizada neste estudo. Os nanocompósitos foram preparados por intercalação no polímero fundido por três técnicas diferentes: adição de argila em suspensão de álcool etílico por uma bomba dosadora de líquidos durante a extrusão, adição de argila em pó por um alimentador mecânico durante a extrusão e adição de suspensão de argila em álcool etílico durante obtenção por batelada. Os materiais obtidos foram caracterizados por difração de raios-X (DRX), microscopia óptica (MO) e microscopia eletrônica de transmissão (MET) e ensaios reológicos de Cisalhamento Oscilatório de Pequenas Amplitudes (COPA). As propriedades térmicas foram analisadas por análise termogravimétrica (TG) e as propriedades mecânicas foram analisadas por ensaios de tração e impacto Izod. As três técnicas se mostraram eficazes na preparação dos nanocompósitos, e seus resultados apresentaram uma similaridade muito grande. Os resultados de DRX e microscopia mostraram que a maioria dos nanocompósitos apresentou estruturas compostas de fases intercaladas e esfoliadas. As análises térmicas mostraram que a adição de argila ao PS o tornou mais estável termicamente, suportando maiores temperaturas antes de iniciar o processo de degradação. Os ensaios reológicos de COPA e ensaios mecânicos dos nanocompósitos obtidos não apresentaram grandes variações em relação ao PS puro.

In this work nanocomposites of polystyrene (PS) and organophilic clays were prepared. The clays were organically modified using three different ammonium quaternary salts: cetyltrimethyl ammonium chloride (commercial name: CTAC), alquildimethyl benzyl ammonium chloride (commercial name: Dodigen) and distearyl dimethyl ammonium chloride (commercial name: Praepagen). The organoclay Cloisite 20 A was also used in this work. The nanocomposites were prepared by melt intercalation using three different techniques: adding the organoclay as a diluted organic solvent supension to the extruder using a motor-driven metering pump, adding the organoclay as powder to the extruder using a mechanical feeder and adding the organoclay as a diluted organic solvent suspension to the mixer. The materials obtained were characterized by X-ray diffraction (XRD), optical microscopy (OM), transmission electron microscopy (TEM) and by rheological studies through small amplitude oscillatory shear tests (SAOS). The thermal properties were studied by thermogravimetrical analyses (TG) and the mechanical properties were studied by tensile and impact Izod strength tests. The three techniques were efficient to prepare nanocomposites, and their results were very similar. The DRX and microscopy results showed that the…

Advisors/Committee Members: Demarquette, Nicole Raymonde.

Subjects/Keywords: Argilas; Clay; Nanocomposites; Nanocompositos

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APA (6^th Edition):

Coelho, C. P. D. (2008). Obtenção e caracterização de nanocompósitos de poliestireno e argilas esmectíticas. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3133/tde-05082009-165838/ ;

Chicago Manual of Style (16^th Edition):

Coelho, Caio Parra Dantas. “Obtenção e caracterização de nanocompósitos de poliestireno e argilas esmectíticas.” 2008. Masters Thesis, University of São Paulo. Accessed February 26, 2021. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-05082009-165838/ ;.

MLA Handbook (7^th Edition):

Coelho, Caio Parra Dantas. “Obtenção e caracterização de nanocompósitos de poliestireno e argilas esmectíticas.” 2008. Web. 26 Feb 2021.

Vancouver:

Coelho CPD. Obtenção e caracterização de nanocompósitos de poliestireno e argilas esmectíticas. [Internet] [Masters thesis]. University of São Paulo; 2008. [cited 2021 Feb 26]. Available from: http://www.teses.usp.br/teses/disponiveis/3/3133/tde-05082009-165838/ ;.

Council of Science Editors:

Coelho CPD. Obtenção e caracterização de nanocompósitos de poliestireno e argilas esmectíticas. [Masters Thesis]. University of São Paulo; 2008. Available from: http://www.teses.usp.br/teses/disponiveis/3/3133/tde-05082009-165838/ ;

20. Yang, Fengyuan. SUPERCRITICAL CARBON DIOXIDE (scCO2) PROCESSING OF DISPERSED POLYMER/CLAY NANOCOMPOSITES: STRUCTURAL AND BARRIER PROPERTIES.

Degree: 2014, Johns Hopkins University

URL: http://jhir.library.jhu.edu/handle/1774.2/37884

► Improved polymeric packaging materials have significantly economic and environmental impact on food, beverage and other industries. In this dissertation, we developed polymer/clay nanocomposites, by incorporating… (more)

▼ Improved polymeric packaging materials have significantly economic and environmental impact on food, beverage and other industries. In this dissertation, we developed polymer/clay nanocomposites, by incorporating impermeable layered silicates into polymeric matrix to enhance barrier properties. We utilized the unique properties of super critical carbon dioxide (scCO2) to exfoliate clay layers and improve polymer-clay interactions, which are two key challenges in the field of nanocomposites. Firstly, the scCO2 processing was applied to pre-disperse various commercial Cloisite® clays, the effects of scCO2 processing and chemical and physical properties of clay particles on clay pre-dispersion were investigated and the extent of clay pre-dispersion was assessed by SEM, WAXD and TGA. We found that the scCO2 processing results in pre-dispersion of organic modified clays regardless what kind of modifier on them. The degree of dispersion of different kind of clays actually is a competitive result between carbon dioxide philicity and modifiers interaction. In addition, TGA data confirm that the scCO2 processing does not remove surface modifiers from clays, which maintain good solubility of clay in organic solvent and compatibility with organic phase. Secondly, the pre-dispersed clay particles were solution blending with polystyrene (PS) to form nanocomposites, whose structural physical properties were characterized and evaluated by WAXD and TEM. The effects of scCO2 processing, clay dispersion, modification and fraction on improvements of physical properties such as rheology and barrier of nanocomposites were investigated. In addition, structure-barrier properties relationship was assessed based on several phenomenological models. In particular, we identified that 10A is the best reinforcement for improving PS barrier properties. Microstructural and barrier properties characterizations revealed that scCO2 processed clays prevent reorganization of platelets and lead to more homogenously clay dispersion with improved interfaces. As the increase of clay fraction and dispersion, gas permeation decreased continuously, in this study ~83% reduction of permeation had been achieved with 3.1 vol% of scCO2 processed clays with a calculated effective aspect ratio of 109. Finally, the concept of scCO2 processing reinforced polymer/clay nanocomposites based on PS matrix was translated to more complex melting extrusion of engineering polymers, such as polyethylene terephthalate (PET) and high density polyethylene (HDPE). The effects of scCO2 processing, clay dispersion, modification and fraction and temperature on improvements of structural and physical properties of matrix were investigated and discussed. 30B and 20A were identified as the best candidate for improving barrier properties of PET and HDPE respectively. Similarly, we found that scCO2 processed clays lead to more homogenously clay dispersion with improved interfaces. Nevertheless, unlike previous research, permeation of PET did not decrease continuously with increase of clay… Advisors/Committee Members: Rangaramanujam, Kannan (advisor).

Subjects/Keywords: Nanocomposites; Super critical carbon dioxide

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yang, F. (2014). SUPERCRITICAL CARBON DIOXIDE (scCO2) PROCESSING OF DISPERSED POLYMER/CLAY NANOCOMPOSITES: STRUCTURAL AND BARRIER PROPERTIES. (Thesis). Johns Hopkins University. Retrieved from http://jhir.library.jhu.edu/handle/1774.2/37884

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yang, Fengyuan. “SUPERCRITICAL CARBON DIOXIDE (scCO2) PROCESSING OF DISPERSED POLYMER/CLAY NANOCOMPOSITES: STRUCTURAL AND BARRIER PROPERTIES.” 2014. Thesis, Johns Hopkins University. Accessed February 26, 2021. http://jhir.library.jhu.edu/handle/1774.2/37884.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yang, Fengyuan. “SUPERCRITICAL CARBON DIOXIDE (scCO2) PROCESSING OF DISPERSED POLYMER/CLAY NANOCOMPOSITES: STRUCTURAL AND BARRIER PROPERTIES.” 2014. Web. 26 Feb 2021.

Vancouver:

Yang F. SUPERCRITICAL CARBON DIOXIDE (scCO2) PROCESSING OF DISPERSED POLYMER/CLAY NANOCOMPOSITES: STRUCTURAL AND BARRIER PROPERTIES. [Internet] [Thesis]. Johns Hopkins University; 2014. [cited 2021 Feb 26]. Available from: http://jhir.library.jhu.edu/handle/1774.2/37884.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yang F. SUPERCRITICAL CARBON DIOXIDE (scCO2) PROCESSING OF DISPERSED POLYMER/CLAY NANOCOMPOSITES: STRUCTURAL AND BARRIER PROPERTIES. [Thesis]. Johns Hopkins University; 2014. Available from: http://jhir.library.jhu.edu/handle/1774.2/37884

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manchester

21. Naji, Haneen. Fabricating of Multiscale Composite Materials Based on TPU reinforced by carbon fibre and Graphene Nanoplatelets (GNPs).

Degree: 2019, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322469

► This project focuses on manufacturing novel carbon fibre (CF) multiscale composites (MSCs) based on nanocomposite matrices of thermoplastic polyurethane (TPU) and graphene nanoplatelets (GNPs). The… (more)

▼ This project focuses on manufacturing novel carbon fibre (CF) multiscale composites (MSCs) based on nanocomposite matrices of thermoplastic polyurethane (TPU) and graphene nanoplatelets (GNPs). The main aim of this study is to obtain innovative MSCs with optimised electrical, thermal and mechanical properties that make them applicable to aerospace, transportation and electrical devices. The TPU with 70 wt. % hard segments (HS) was filled with three different sizes of GNPs, with average particle diameters of 5 microns (GNPM5), 15 microns (GNPM15) and 25 Âmicrons (GNPM25), and reinforced with CF fabric to produce MSCs. The effect of GNP size and annealing treatment on the thermal dynamic, mechanical and electrical properties of TPU-70 HS and TPU70/CF laminate were investigated. Following these tests, the best MSCs that could be obtained were used to study the effect of GNP content on the Mode-I interlaminar fracture toughness (ILFT), impact-damage resistance and damage tolerance of TPU70/CF laminates. It was found that the tensile modulus (E) and flexural modulus (FM) of polymers-NCs matrices were affected by both the size of GNPs and annealing treatments. While the addition of GNPM25 yielded an impressive improvement in the E and FM of TPU-70 HS, the annealing treatment caused a slight reduction owing to the disruption of phase separation and restacking of the GNP flakes. However, the neat TPU-70 HS exhibited significant improvements in the E and FM after annealing due to the formation of microcrystalline hard domain (HD) phase separation, which caused an increase in stiffness. The in-plane and out-of-plane electrical conductivity and the thermal conductivity of NCs combined with GNPM15 and GNPM25 showed a significant improvement compared to that of neat TPU-70 HS. The same results of E and FM were reported for MSCs based on GNPM25, where the E and FM enhanced by 19% and 105% compared with that of TPU70/CF laminates and reduced by 11% and 4% respectively after annealing. The out-of-plane electrical conductivity of TPU70/CF composites showed a noticeable improvement upon incorporating GNPM15 and GNPM25. Conversely, the thermal conductivity of the TPU70/CF laminate exhibited a significant improvement upon the addition of GNPM5 compared to that of GNPM15 and GNPM25. This result might be attributed to the non-uniform dispersion of GNPM5 due to its small size, leading to an increase in local thermal diffusivity. Since the best tensile, flexural and electrical properties were ascribed to the NCs and MSCs combined with GNPM25, these materials were selected and different weight percentages of GNPs (0.5, 2.5 and 5) were used. The MSCs combined with 0.5 wt.% GNPs showed a slight improvement in the GIC-Max and GIC-Prop compared with that of the TPU-70 CF, while a high loading caused a significant reduction in both GIC initiation and propagation. In addition, both the impact-damage resistance and residual compressive strength of MSCs at high GNP loading and impact energy levels experienced a significant reduction compared to… Advisors/Committee Members: GRESIL, MATTHIEU M, Saiani, Alberto, Gresil, Matthieu.

Subjects/Keywords: graphene nanoplatelets nanocomposites; Multiscale composites

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APA (6^th Edition):

Naji, H. (2019). Fabricating of Multiscale Composite Materials Based on TPU reinforced by carbon fibre and Graphene Nanoplatelets (GNPs). (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322469

Chicago Manual of Style (16^th Edition):

Naji, Haneen. “Fabricating of Multiscale Composite Materials Based on TPU reinforced by carbon fibre and Graphene Nanoplatelets (GNPs).” 2019. Doctoral Dissertation, University of Manchester. Accessed February 26, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322469.

MLA Handbook (7^th Edition):

Naji, Haneen. “Fabricating of Multiscale Composite Materials Based on TPU reinforced by carbon fibre and Graphene Nanoplatelets (GNPs).” 2019. Web. 26 Feb 2021.

Vancouver:

Naji H. Fabricating of Multiscale Composite Materials Based on TPU reinforced by carbon fibre and Graphene Nanoplatelets (GNPs). [Internet] [Doctoral dissertation]. University of Manchester; 2019. [cited 2021 Feb 26]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322469.

Council of Science Editors:

Naji H. Fabricating of Multiscale Composite Materials Based on TPU reinforced by carbon fibre and Graphene Nanoplatelets (GNPs). [Doctoral Dissertation]. University of Manchester; 2019. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:322469

Cornell University

22. Kim, Daniel. Polymer Nanocomposites: Polymer And Particle Dynamics And Its Application As Lubricant.

Degree: M.S., Chemical Engineering, Chemical Engineering, 2012, Cornell University

URL: http://hdl.handle.net/1813/31010

► My thesis is prepared upon two separate yet interdisciplinary projects. First, I present a project entitled 'Polymer Nanocomposites: Polymer and Particle Dynamics' where I investigate… (more)

▼ My thesis is prepared upon two separate yet interdisciplinary projects. First, I present a project entitled 'Polymer Nanocomposites: Polymer and Particle Dynamics' where I investigate dynamics of polymer and particle upon their mixing. On second part of the thesis, I present one of the application of polymer nanocomposites (PNC) entitled 'Nanoscale Organic-Inorganic Hybrid Lubricants'. Understanding nanoscale dynamics of polymer and particle upon mixing will be a useful guide to improve its application. Polymer Nanocomposites: Polymer and Particle Dynamics - Polymer nanocomposites containing nanoparticles smaller than the random coil size of their host polymer chains are known to exhibit unique properties, such as lower viscosity and glass transition temperature relative to the neat polymer melt. It has been hypothesized that these unusual properties result from fast diffusion of the nanostructures in the host polymer, which facilitates polymer chain relaxation by constraint release and other processes. In this study, the effects of addition of sterically stabilized inorganic nanoparticles to entangled cis-1,4-polyisoprene and polydimethylsiloxane on the overall rheology of nanocomposites are discussed. In addition, insights about the relaxation of the host polymer chains and transport properties of nanoparticles in entangled polymer nanocomposites are presented. The nanoparticles are found to act as effective plasticizers for their entangled linear hosts, and below a critical, chemistry and molecular-weight dependent particle volume fraction, lead to reduced viscosity, glass transition temperature, number of entanglements, and polymer relaxation time. We also find that the particle motions in the polymer host are hyperdiffusive and at the nanoparticle length scale, the polymer host acts like a simple, ideal fluid and the composites' viscosity rises with increasing particle concentration. Nanoscale Organic-Inorganic Hybrid Lubricants - Silica (SiO2) nanoparticles densely grafted with amphiphilic organic chains are used to create a family of organicinorganic hybrid lubricants. Short sulfonate-functionalized alkylaryl chains covalently tethered to the particles form a dense corona brush that stabilizes them against aggregation. When these hybrid particles are dispersed in poly-[alpha]-olefin (PAO) oligomers, they form homogeneous nanocomposite fluids at both low and high particle loadings. By varying the volume fraction of the SiO2 nanostructures in the PAO nanocomposites, we show that exceptionally stable hybrid lubricants can be created and that their mechanical properties can be tuned to span the spectrum from simple liquids to complex gels. We further show that these hybrid lubricants simultaneously exhibit lower interfacial friction coefficients, enhanced wear and mechanical properties, and superior thermal stability in comparison with either PAO or its nanocomposites created at low nanoparticle loadings. Profilometry and energy dispersive X-ray spectroscopic analysis of the wear track show that the enhanced wear… Advisors/Committee Members: Archer, Lynden A. (chair), Joo, Yong L. (committee member).

Subjects/Keywords: polymer; polymer nanocomposites; nanoparticle

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kim, D. (2012). Polymer Nanocomposites: Polymer And Particle Dynamics And Its Application As Lubricant. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/31010

Chicago Manual of Style (16^th Edition):

Kim, Daniel. “Polymer Nanocomposites: Polymer And Particle Dynamics And Its Application As Lubricant.” 2012. Masters Thesis, Cornell University. Accessed February 26, 2021. http://hdl.handle.net/1813/31010.

MLA Handbook (7^th Edition):

Kim, Daniel. “Polymer Nanocomposites: Polymer And Particle Dynamics And Its Application As Lubricant.” 2012. Web. 26 Feb 2021.

Vancouver:

Kim D. Polymer Nanocomposites: Polymer And Particle Dynamics And Its Application As Lubricant. [Internet] [Masters thesis]. Cornell University; 2012. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/1813/31010.

Council of Science Editors:

Kim D. Polymer Nanocomposites: Polymer And Particle Dynamics And Its Application As Lubricant. [Masters Thesis]. Cornell University; 2012. Available from: http://hdl.handle.net/1813/31010

Cornell University

23. Tasneem, Jennifer Eva. A PHYSICAL CONFINEMENT-BASED FORMATION OF SEMICONDUCTOR OXIDE/PLASMONIC NANOPARTICLE HETEROSTRUCTURES.

Degree: M.S., Materials Science and Engineering, Materials Science and Engineering, 2020, Cornell University

URL: http://hdl.handle.net/1813/70233

► In nature, biological organisms have substantial control over processes that lead to the formation of biominerals. For example, magnetotactic bacteria utilize the confined volumes of… (more)

▼ In nature, biological organisms have substantial control over processes that lead to the formation of biominerals. For example, magnetotactic bacteria utilize the confined volumes of magnetosomes to crystallize magnetic iron oxide particles that are enclosed in lipid bilayer membranes. The organisms are able to form carefully controlled chains of these particles that they use as a compass to navigate the Earth’s geomagnetic field. By taking inspiration from such naturally occurring processes, we aim to synthesize functional composites under confinement that possess excellent optoelectronic and photocatalytic properties. Semiconductor oxide and plasmonic metal nanoparticle heterostructures are excellent candidates for studying metal-to-semiconductor energy transfer for optoelectronic applications. Entrapment of plasmonic nanoparticles such as gold and silver within semiconducting materials such as copper oxide and zinc oxide, greatly increases their optical absorption and charge transfer. Two typical morphologies of such heterostructures, such as core-shell nanoparticles and preformed semiconductor oxide structures that are decorated with plasmonic nanoparticles, have been well studied, however, these structures both have limitations on the degree of optical enhancement due to the morphology of the structures. In this study, we used a physical confinement-based technique using track-etched polycarbonate membranes to synthesize heterostructures based on a bio-inspired crystal growth approach to incorporate arrays of plasmonic nanoparticles without the use of insulating surface ligands. By carefully controlling the synthesis protocol, we are able to tune the spatial distribution of nanoparticles that are entrapped within the semiconductor matrices which can give rise to diverse splitting and broadening of the plasmon peak in the heterostructures. It is important to expand the viable morphologies of heterostructures used in photovoltaic applications because electronic properties depend on the morphology and nanostructure of the composites. Our results demonstrate the flexibility of the physical confinement-based approach to synthesize crystalline architectures which entrap multiple plasmonic nanoparticles within a semiconducting matrix to access a relatively unexplored morphology that can enable promising optoelectronic properties. Advisors/Committee Members: Estroff, Lara (chair), Suntivich, Jin (committee member).

Subjects/Keywords: Nanocomposites; Plasmonic nanoparticles; semiconductor oxides

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APA (6^th Edition):

Tasneem, J. E. (2020). A PHYSICAL CONFINEMENT-BASED FORMATION OF SEMICONDUCTOR OXIDE/PLASMONIC NANOPARTICLE HETEROSTRUCTURES. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/70233

Chicago Manual of Style (16^th Edition):

Tasneem, Jennifer Eva. “A PHYSICAL CONFINEMENT-BASED FORMATION OF SEMICONDUCTOR OXIDE/PLASMONIC NANOPARTICLE HETEROSTRUCTURES.” 2020. Masters Thesis, Cornell University. Accessed February 26, 2021. http://hdl.handle.net/1813/70233.

MLA Handbook (7^th Edition):

Tasneem, Jennifer Eva. “A PHYSICAL CONFINEMENT-BASED FORMATION OF SEMICONDUCTOR OXIDE/PLASMONIC NANOPARTICLE HETEROSTRUCTURES.” 2020. Web. 26 Feb 2021.

Vancouver:

Tasneem JE. A PHYSICAL CONFINEMENT-BASED FORMATION OF SEMICONDUCTOR OXIDE/PLASMONIC NANOPARTICLE HETEROSTRUCTURES. [Internet] [Masters thesis]. Cornell University; 2020. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/1813/70233.

Council of Science Editors:

Tasneem JE. A PHYSICAL CONFINEMENT-BASED FORMATION OF SEMICONDUCTOR OXIDE/PLASMONIC NANOPARTICLE HETEROSTRUCTURES. [Masters Thesis]. Cornell University; 2020. Available from: http://hdl.handle.net/1813/70233

Universidade Estadual de Campinas

24. Nogueira, Telma Regina. Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides.

Degree: 2012, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777

► Abstract: Recently, nanocomposites consisting of polymer and mineral clays have attracted considerable scientific interest. Most published works on the production of polymer nanocomposites use clay… (more)

▼ Abstract: Recently, nanocomposites consisting of polymer and mineral clays have attracted considerable scientific interest. Most published works on the production of polymer nanocomposites use clay mineral fillers such as montmorillonite, modified with cationic surfactants. Another class of anionic exchanger is layered double hydroxides (LDH), which rarely occur in nature but are very simple and inexpensive to synthesize, allowing the production of highly defined composition material. In this study we have investigated "in situ" bulk polymerization of methyl methacrylate (MMA) in the presence of LDHs intercalated by organic anions (dodecyl sulfate, laurate, stearate). There are few studies in the open literature on the mechanical and thermal properties of PMMA nanocomposites reinforced with hydrophobic HDLs and so far it was not found in open literature studies about the mechanical and thermal properties of the PMMA nanocomposites reinforced with stearate intercalated LDHs. In our laboratory, the investigation in the nanocomposites area started recently, however, some results on the nanocomposites of polystyrene and layered double hydroxides have already been produced. In the present work were synthesized nanocomposites with high transparence in the visible region as well as nanocomposites with an uniform orange color, without the addition of dyes or pigments. By thermogravimetric analysis, the results showed that the addition of LDHs may increase PMMA decomposition temperature in more than 80°C. The results of dynamic mechanical analysis, for nanocomposites with 1wt% of LDHs, showed that elastic modulus more than 2 times higher than PMMA in the range of studied temperature. In order to verify how the LDH concentration could affect the previously evaluated properties, nanocomposites containing six different pre-selected LDHs, in two different concentrations (3% and 5%) were synthesized. These results demonstrated that most of these nanocomposites presented microhardness values higher than those found for PMMA Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Lona, Liliane Maria Ferrareso, 1966- (advisor), Wypych, Fernando (coadvisor), Universidade Estadual de Campinas. Faculdade de Engenharia Química (institution), Programa de Pós-Graduação em Engenharia Química (nameofprogram), Sayer, Claudia (committee member), Giordani, Domingos Savio (committee member), Marangoni, Rafael (committee member), Santos, Paula Sbaite Duarte dos (committee member).

Subjects/Keywords: Nanocompósitos (Materiais); PMMA1; Nanocomposites; PMMA

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APA (6^th Edition):

Nogueira, T. R. (2012). Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nogueira, Telma Regina. “Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides.” 2012. Thesis, Universidade Estadual de Campinas. Accessed February 26, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nogueira, Telma Regina. “Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides.” 2012. Web. 26 Feb 2021.

Vancouver:

Nogueira TR. Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides. [Internet] [Thesis]. Universidade Estadual de Campinas; 2012. [cited 2021 Feb 26]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nogueira TR. Síntese de nanocompósitos a partir de metacrilato de metila e hidróxidos duplos lamelares: Synthesis of nancomposites with poly(methyl methacrylate) reinforced by layered double hydroxides. [Thesis]. Universidade Estadual de Campinas; 2012. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266777

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University

25. Nixon Samuel Vijayakumar G. Synthesis of ZnO CuO BaO MnO ZnO BaO AND ZnO CaO composite nanofibers by electrospinning and their characterization;.

Degree: 2014, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/14693

►

Electrospinning process is a versatile process which uses an electrostatic force to process many kinds of materials like polymers, composite, ceramic materials, etc. Electrospinning of… (more)

▼

Electrospinning process is a versatile process which uses an electrostatic force to process many kinds of materials like polymers, composite, ceramic materials, etc. Electrospinning of the composite sol derived from the sol-gel process yields one dimensional nanocomposite fibers. Poly (Vinyl Alcohol) / zinc acetate / copper acetate nanofibers were synthesized by electrospinning the sol obtained in the sol-gel process. The effect of applied voltage on the morphology of the fibers was studied. Nonlinear optical properties were studied by Kurtz-Perry powder technique and Second Harmonic Generation (SHG) efficiency was measured to be 11.1 times than that of KDP PVA / barium acetate / manganese acetate sol was electrospun to obtain composite nanofibers. These nanofibers were calcined at 1023 K for 5h and BaO / MnO composite nanofibers were obtained. Morphology of these nanofibers were studied by varying the size of the needle opening. Composite fibers of PVA / zinc acetate / barium acetate were obtained by electrospinning the sol obtained in the sol-gel process. The effect on morphology of these fibers was studied with respect to working distance. From the dielectric studies, it was found that the material exhibits ferroelectric to paraelectric phase transition at 323 K. From the SHG test, Second Harmonic Generation efficiency of this material was found to be 0.55 times than that of KDP. Second harmonic generation efficiency of ZnO/Ca0.5O and Zn0.5O/CaO nanocomposites were found to be 1.63 and 2.94 times than that of KDP. The A.C.conductivity of ZnO/Ca0.5O, Zn0.5O/CaO and ZnO/CaO nanocomposite materials were investigated. Among all the three composite materials, Zn0.5O/CaO has the highest conductivity, ZnO/CaO has moderate conductivity and ZnO/Ca0.5O has the least conductivity at 308 K. All these nanofibers exhibited interesting properties and could be used as potential candidates in various engineering applications. newline newline newline

Advisors/Committee Members: Suresh Kumar P.

Subjects/Keywords: Synthesis; nanofibers; electrospinning; paraelectric; nanocomposites

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APA (6^th Edition):

G, N. S. V. (2014). Synthesis of ZnO CuO BaO MnO ZnO BaO AND ZnO CaO composite nanofibers by electrospinning and their characterization;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/14693

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

G, Nixon Samuel Vijayakumar. “Synthesis of ZnO CuO BaO MnO ZnO BaO AND ZnO CaO composite nanofibers by electrospinning and their characterization;.” 2014. Thesis, Anna University. Accessed February 26, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/14693.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

G, Nixon Samuel Vijayakumar. “Synthesis of ZnO CuO BaO MnO ZnO BaO AND ZnO CaO composite nanofibers by electrospinning and their characterization;.” 2014. Web. 26 Feb 2021.

Vancouver:

G NSV. Synthesis of ZnO CuO BaO MnO ZnO BaO AND ZnO CaO composite nanofibers by electrospinning and their characterization;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Feb 26]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/14693.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

G NSV. Synthesis of ZnO CuO BaO MnO ZnO BaO AND ZnO CaO composite nanofibers by electrospinning and their characterization;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/14693

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University

26. Revathi Purushothaman. Development and characterization of mesoporous terpolyimide nanocomposites with low dielectric constant.

Degree: Chemistry, 2013, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/9988

►

Polyimides are a sophisticated family of materials, which cover an exhaustive range of high performance polymers. They find applications in highly technical end use fields… (more)

Subjects/Keywords: Dielectric constant; Mesoporous terpolyimide nanocomposites

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APA (6^th Edition):

Purushothaman, R. (2013). Development and characterization of mesoporous terpolyimide nanocomposites with low dielectric constant. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/9988

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Purushothaman, Revathi. “Development and characterization of mesoporous terpolyimide nanocomposites with low dielectric constant.” 2013. Thesis, Anna University. Accessed February 26, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/9988.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Purushothaman, Revathi. “Development and characterization of mesoporous terpolyimide nanocomposites with low dielectric constant.” 2013. Web. 26 Feb 2021.

Vancouver:

Purushothaman R. Development and characterization of mesoporous terpolyimide nanocomposites with low dielectric constant. [Internet] [Thesis]. Anna University; 2013. [cited 2021 Feb 26]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9988.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Purushothaman R. Development and characterization of mesoporous terpolyimide nanocomposites with low dielectric constant. [Thesis]. Anna University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9988

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Stellenbosch University

27. Siebert, Piere-Andre John. Electrospun carbon nanotube filled composite nanofibers by non-covalent compatibilization.

Degree: MSc, Chemistry and Polymer Science, 2016, Stellenbosch University

URL: http://hdl.handle.net/10019.1/98299

► ENGLISH ABSTRACT: This study covers the successful production of poly(acrylonitrile) (PAN)/multi-walled-carbon-nanotube (MWCNT) fibrous composites by the incorporation of noncovalently functionalized MWCNTs in various loading fractions.… (more)

▼ ENGLISH ABSTRACT: This study covers the successful production of poly(acrylonitrile) (PAN)/multi-walled-carbon-nanotube (MWCNT) fibrous composites by the incorporation of noncovalently functionalized MWCNTs in various loading fractions. In maintaining the sp2 hybridization as opposed to the conventional covalent functionalization, the conjugated MWCNT structure is maintained and in doing so preserves the mechanical and conductive properties commonly associated with these fillers. This allows for the optimum transference of desired property/properties to the produced composite assuming sufficient filler dispersion. MWCNTs are functionalized by polymeric compatibilizers of mono- and multi pyrene functional character. The pyrene moiety allows for the noncovalent 𝜋-𝜋 stacking interaction to the conjugated surface of MWCNTs by strong van der Waals forces. Mono pyrene functional poly(acrylonitrile) (Py-PAN) polymers were synthesized via Atom Transfer Radical Polymerization (ATRP) from presynthesized pyrene functional initiators namely 1-pyrenemethyl-2-bromoisobutyrate and 1-pyrenebutyl-2-bromoisobutyrate respectively. The synthesis of PAN polymers of α-chain end pyrene functionality was also attempted by the relatively unexplored redox initiated polymerization by catalytic cerium ammonium nitrate (CAN) from 1-pyrenemethanol and 1-pyrenebutanol initiators respectively. The synthesis proved challenging from the proposed initiators and with relatively low yields even after an extensive method development in an effort to achieve optimum reaction conditions. Multi pyrene functional PAN polymers (PAN-co-PyMMP) was successfully prepared via Conventional Free Radical (CFR) copolymerization of conventional acrylonitrile (AN) monomers and presynthesized (1-pyrene)methyl-2-methyl-2-propenoate (PyMMP) macromonomers in producing a PAN based polymers of protruding pyrene moieties along the polymer chain. The multi pyrene functional copolymer is successfully prepared to three predetermined PyMMP compositions (or mol% functionality) by variation of the monomer feed ratio. The synthesized initiators as well as the monomer and functional polymers were analyzed by 1H-NMR analysis confirming the isolation of the hypothesized products. 1H-NMR was also implemented to determine the average composition of the pyrene moiety incorporated into both of the structurally alternate functional PAN polymers presented as the mol% pyrene functionality. Mono- and multi-functional variations of the PAN polymer were exposed to increasing amounts of MWCNTs and analyzed by 1H-NMR following reported instances of a quenching phenomenon being seen in the 1H-NMR spectra of signals representing protons taking part in 𝜋-𝜋 stacking interactions (protons protruding from the pyrene moiety). The analysis produced a quenching trend of the polymers as the MWCNT loading is increased. These trends are confirmed by the more common method of tracking these noncovalent 𝜋-𝜋 stacking interactions by the quenching phenomenon apparent from the UV-fluorescence analysis of the… Advisors/Committee Members: Mallon, Peter E., Stellenbosch University. Faculty of Engineering. Dept. of Chemistry and Polymer Science..

Subjects/Keywords: Nanocomposites (Materials); Nanotube; Electrospinning; UCTD

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APA (6^th Edition):

Siebert, P. J. (2016). Electrospun carbon nanotube filled composite nanofibers by non-covalent compatibilization. (Masters Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/98299

Chicago Manual of Style (16^th Edition):

Siebert, Piere-Andre John. “Electrospun carbon nanotube filled composite nanofibers by non-covalent compatibilization.” 2016. Masters Thesis, Stellenbosch University. Accessed February 26, 2021. http://hdl.handle.net/10019.1/98299.

MLA Handbook (7^th Edition):

Siebert, Piere-Andre John. “Electrospun carbon nanotube filled composite nanofibers by non-covalent compatibilization.” 2016. Web. 26 Feb 2021.

Vancouver:

Siebert PJ. Electrospun carbon nanotube filled composite nanofibers by non-covalent compatibilization. [Internet] [Masters thesis]. Stellenbosch University; 2016. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/10019.1/98299.

Council of Science Editors:

Siebert PJ. Electrospun carbon nanotube filled composite nanofibers by non-covalent compatibilization. [Masters Thesis]. Stellenbosch University; 2016. Available from: http://hdl.handle.net/10019.1/98299

McMaster University

28. Zhang, Tianshi. Master's thesis of Tianshi Zhang.

Degree: MASc, 2016, McMaster University

URL: http://hdl.handle.net/11375/20407

► Novel electrocchemical and chemical strategies have been developed for the fabrication of functional nanocomposites. New scientific and engineering contribution of this work to colloidal nanotechnology… (more)

▼ Novel electrocchemical and chemical strategies have been developed for the fabrication of functional nanocomposites. New scientific and engineering contribution of this work to colloidal nanotechnology included the development of advanced chelating dispersing agents, such as various small organic molecules and chelating polymers. The unique feature of such dispersion agents is their strong adsorption on the surface of different materials, which allows superior dispersion. The chelating monomers of chelating polymers, such as PAZO and PMSS provided multiple adsorption sites for bonding to metal atoms on the particles surface. We analyzed and developed new fundamental adsorption and dispersion mechanisms. An important finding was the possibility of co-dispersion and co-deposition of advanced materials such as oxides, nitrides, complex oxides and minerals using universal dispersing agents and formation of composites by EPD method. It was found that Caffeic acid (CA) can be used as an efficient dispersing agent for the synthesis of ZnO nanorods of reduced size and a dispersing agent for the EPD of ZnO films. Another important achievement of this work was the application of tannic acid as an efficient capping and dispersing agent for synthesis and EPD of inorganic materials and composites. An important discovery was the use of lauryl gallate dispersant as a reducing agent for the synthesis of AgNp and a vehicle for particle dispersion and extraction in the liquid-liquid extraction method. Further advancements in our new technologies allowed us to develop composite films using anodic EPD using weak polyelectrolytes, such as alginate. The composite coatings exhibited protective and flame retardant properties. We analyzed the deposition mechanisms and kinetics as well as microstructure of the coatings. In another strategy, we developed electrochemical strategies for the deposition of composites, based on strong polyelectrolytes. The approach is based on the EPD of the polyelectrolyte molecules and electrosynthesis of EPD of ceramic particles. The electrostatic heterocoagulation mechanism was proposed for the deposit formation. We investigated the deposition kinetics, composition and microstructure of the composites prepared by the new strategies. The new electrochemical strategies can be used for the deposition of other composites, based on functional polymers with pH independent charge. New methods have been developed for the chemical synthesis of PPy based composites, using PMSS, PMSS–SR11 and PMSS–SR31 as anionic dopants for chemical polymerization and dispersants for MWCNT. The composites showed promising performance for application in electrodes of electrochemical supercapacitors. Good electrochemical performance was achieved at high active mass loadings. The electrodes showed high capacitance, large voltage window and low impedance. The analysis of electrochemical testing results and chemical structure of PMSS, PMSS–SR11 and PMSS–SR31 provided an insight into the influence of the anionic functional groups on the… Advisors/Committee Members: Zhitomirsky, Igor, Materials Science and Engineering.

Subjects/Keywords: Master's thesis; Nanocomposites; Electrodeoposition; Dispersants

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APA (6^th Edition):

Zhang, T. (2016). Master's thesis of Tianshi Zhang. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/20407

Chicago Manual of Style (16^th Edition):

Zhang, Tianshi. “Master's thesis of Tianshi Zhang.” 2016. Masters Thesis, McMaster University. Accessed February 26, 2021. http://hdl.handle.net/11375/20407.

MLA Handbook (7^th Edition):

Zhang, Tianshi. “Master's thesis of Tianshi Zhang.” 2016. Web. 26 Feb 2021.

Vancouver:

Zhang T. Master's thesis of Tianshi Zhang. [Internet] [Masters thesis]. McMaster University; 2016. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/11375/20407.

Council of Science Editors:

Zhang T. Master's thesis of Tianshi Zhang. [Masters Thesis]. McMaster University; 2016. Available from: http://hdl.handle.net/11375/20407

Queens University

29. Cillero, Rodrigo Antonio. Synthesis and Reinforcement of Peroxide-Cured Butyl Rubber Thermosets .

Degree: Chemical Engineering, 2014, Queens University

URL: http://hdl.handle.net/1974/12623

► Isobutylene-rich elastomers provide the oxidative stability and impermeability required by many industrial applications. Halogenated derivatives support a wide range of chemical modification processes that can… (more)

Subjects/Keywords: Ionomers ; Nanocomposites ; Rubber ; Isobutylene

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cillero, R. A. (2014). Synthesis and Reinforcement of Peroxide-Cured Butyl Rubber Thermosets . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/12623

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cillero, Rodrigo Antonio. “Synthesis and Reinforcement of Peroxide-Cured Butyl Rubber Thermosets .” 2014. Thesis, Queens University. Accessed February 26, 2021. http://hdl.handle.net/1974/12623.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cillero, Rodrigo Antonio. “Synthesis and Reinforcement of Peroxide-Cured Butyl Rubber Thermosets .” 2014. Web. 26 Feb 2021.

Vancouver:

Cillero RA. Synthesis and Reinforcement of Peroxide-Cured Butyl Rubber Thermosets . [Internet] [Thesis]. Queens University; 2014. [cited 2021 Feb 26]. Available from: http://hdl.handle.net/1974/12623.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cillero RA. Synthesis and Reinforcement of Peroxide-Cured Butyl Rubber Thermosets . [Thesis]. Queens University; 2014. Available from: http://hdl.handle.net/1974/12623

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University

30. Karikalchozhan C. Studies on synthesis andCharacterization of polybenzoxazineBased nanocomposites;.

Degree: Studies on synthesis andCharacterization of polybenzoxazineBased nanocomposites, 2015, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/43080

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The objective of the present work is to focus on the synthesis and newlinecharacterization of different functionalized polybenzoxazines and to improve newlinethe properties of polybenzoxazines… (more)

Subjects/Keywords: nanocomposites; polybenzoxazine; Science and humanities

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

C, K. (2015). Studies on synthesis andCharacterization of polybenzoxazineBased nanocomposites;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/43080

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

C, Karikalchozhan. “Studies on synthesis andCharacterization of polybenzoxazineBased nanocomposites;.” 2015. Thesis, Anna University. Accessed February 26, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/43080.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

C, Karikalchozhan. “Studies on synthesis andCharacterization of polybenzoxazineBased nanocomposites;.” 2015. Web. 26 Feb 2021.

Vancouver:

C K. Studies on synthesis andCharacterization of polybenzoxazineBased nanocomposites;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Feb 26]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/43080.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

C K. Studies on synthesis andCharacterization of polybenzoxazineBased nanocomposites;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/43080

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations