subject:(Polymers Surfaces)

Hong Kong University of Science and Technology

1. Zeng, Xinmiao. Surface study of polymer blends.

Degree: 1999, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-5865 ; https://doi.org/10.14711/thesis-b648433 ; http://repository.ust.hk/ir/bitstream/1783.1-5865/1/th_redirect.html

► The behavior of polymer blend surface is important to many technologies. In practice, the surface composition and morphology are critical to their performance. Therefore, the… (more)

▼ The behavior of polymer blend surface is important to many technologies. In practice, the surface composition and morphology are critical to their performance. Therefore, the surface properties and the surface characterization techniques of polymer blends have become more important. The surface properties of polymer blends are highly affected by the intermolecular interaction between the two polymers. The intermolecular interaction may be used to increase the miscibility of polymer blends. In this thesis, two systems – miscible and immiscible polymer blends – were studied. Part I focuses on the effects of hydrogen bonding, casting solvents, and molecular weight on the surface composition. Systematic studies were performed on the blends of Poly (4-Vinyl phenol) (PVPh) and Poly (4-Vinyl pyridine) (PVPy) in different solvents, including ethanol and N, N-dimethylformamide (DMF). The surface properties of PVPhIPVPy films were characterized by time-of-flight secondary ion mass spectrometry (ToF-SIMS), X-ray photoelectron spectroscopy (XPS), and contact angle measurements. The bulk behavior of the PVPh/PVPy samples was determined by elemental analysis and differential scanning calorimetry (DSC) study. Positive derivation of glass transition temperature (Tg) was obtained for both the blends and the complexes, indicating a strong interaction between the PVPh and PVPy for the blends and complexes. The characteristic positive ions were identified and used in demonstrating the intermolecular hydrogen bonding between PVPh and PVPy in the SIMS spectra obtained. The possible processes for the formation of the hydrogen bonding were proposed. The peak intensity of the characteristic pyridyl ions of the blends, and especially of the PVPh/PVPy complexes, such as the peak at m/z=106, was greatly enhanced by the hydrogen bonding. Both X-ray photoelectron spectroscopy and contact angle results showed no surface segregation of any component for the blends and complexes for a low molecular weight PVPh and PVPy. Excess of PVPy was found at the surface of the blends when a high molecular weight PVPh was used. However, after annealing at 90°C in a vacuum oven for five days, the surface and bulk compositions were the same. These findings revealed that the surface of blends of high molecular weight polymers may not be in the thermodynamic equilibrium state. The quantitative relationship between the ion intensity ratio and the surface composition was established for the hydrogen-bonded polymer blends and complexes. Negative ion ratios were shown to be very useful in SIMS quantitative study. A linear relationship was established between the relative intensity of the characteristic negative ions and the surface concentration obtained from XPS data. In part II, the influence of poly(styrene-co-4-vinylphenol) (STVPh-x, x represents the vinylphenol content, mole %) copolymers with various vinylphenol contents on the surface morphology of immiscible blends of polystyrene (PS) and poly( N-vinyl-2-pyrrolidone) (PVP) was investigated by…

Subjects/Keywords: Polymers – Surfaces

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APA (6^th Edition):

Zeng, X. (1999). Surface study of polymer blends. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-5865 ; https://doi.org/10.14711/thesis-b648433 ; http://repository.ust.hk/ir/bitstream/1783.1-5865/1/th_redirect.html

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):

Zeng, Xinmiao. “Surface study of polymer blends.” 1999. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-5865 ; https://doi.org/10.14711/thesis-b648433 ; http://repository.ust.hk/ir/bitstream/1783.1-5865/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Zeng, Xinmiao. “Surface study of polymer blends.” 1999. Web. 10 Apr 2021.

Vancouver:

Zeng X. Surface study of polymer blends. [Internet] [Thesis]. Hong Kong University of Science and Technology; 1999. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-5865 ; https://doi.org/10.14711/thesis-b648433 ; http://repository.ust.hk/ir/bitstream/1783.1-5865/1/th_redirect.html.

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

Council of Science Editors:

Zeng X. Surface study of polymer blends. [Thesis]. Hong Kong University of Science and Technology; 1999. Available from: http://repository.ust.hk/ir/Record/1783.1-5865 ; https://doi.org/10.14711/thesis-b648433 ; http://repository.ust.hk/ir/bitstream/1783.1-5865/1/th_redirect.html

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

Hong Kong University of Science and Technology

2. Ren, Xianwen. Instability and morphology of polymer films.

Degree: 2012, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-7714 ; https://doi.org/10.14711/thesis-b1198668 ; http://repository.ust.hk/ir/bitstream/1783.1-7714/1/th_redirect.html

► The fidelity of pattern transfer in lithography relies on how much we can control the integrity of resist films and patterns throughout the process. It… (more)

▼ The fidelity of pattern transfer in lithography relies on how much we can control the integrity of resist films and patterns throughout the process. It is necessary to avoid undesired instability and defects of the resist films in order to ensure the accuracy of the design. This thesis aims to investigate the instability and the surface morphology of polymer films. Spin coating is the most widely used technique to prepare polymer films. Unfortunately, surface patterns are often obtained in spin coated films. Consensus remains elusive till now regarding the formation of these surface patterns. In this thesis, the effects of solvents and substrates on the stability and the surface morphology of polymer thin films have been systematically studied. The stability and the surface morphology were found to depend on the competition of polymer-substrate and solvent-substrate interactions. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) depth profiles were used to determine the distribution of end groups along the depth of the films. A high concentration of bromine end groups at the interface helps to prevent dewetting of films. An increase in the solvent-substrate interactions, which inhibited any contact between the polymer and the substrate, promoted dewetting of films. The addition of nanoparticles was able to suppress dewetting of films. The distribution of the nanoparticles along the depth of the films was obtained by ToF-SIMS depth profiling. The suppression of dewetting was attributed to the surface segregation of the nanoparticles because of their low-surface-tension surface coating. The structure of surface patterns was revealed by ToF-SIMS 3D microanalyses. For the first time, the surface patterns were unambiguously shown to be hollow rather than solid. Moreover, the structural parameters of the surface patterns were estimated from the retrospectively reconstructed depth profiles. In addition, the effects of temperature and plasma treatment on the morphology of polymer films were also investigated in this thesis.

Subjects/Keywords: Thin films ; Polymers – Surfaces ; Polymerization

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APA (6^th Edition):

Ren, X. (2012). Instability and morphology of polymer films. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-7714 ; https://doi.org/10.14711/thesis-b1198668 ; http://repository.ust.hk/ir/bitstream/1783.1-7714/1/th_redirect.html

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):

Ren, Xianwen. “Instability and morphology of polymer films.” 2012. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-7714 ; https://doi.org/10.14711/thesis-b1198668 ; http://repository.ust.hk/ir/bitstream/1783.1-7714/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Ren, Xianwen. “Instability and morphology of polymer films.” 2012. Web. 10 Apr 2021.

Vancouver:

Ren X. Instability and morphology of polymer films. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2012. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-7714 ; https://doi.org/10.14711/thesis-b1198668 ; http://repository.ust.hk/ir/bitstream/1783.1-7714/1/th_redirect.html.

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

Council of Science Editors:

Ren X. Instability and morphology of polymer films. [Thesis]. Hong Kong University of Science and Technology; 2012. Available from: http://repository.ust.hk/ir/Record/1783.1-7714 ; https://doi.org/10.14711/thesis-b1198668 ; http://repository.ust.hk/ir/bitstream/1783.1-7714/1/th_redirect.html

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

Drexel University

3. Sha, Xue. Synthesis and characterization of useful polymer-based surface layers and bulk materials.

Degree: 2014, Drexel University

URL: http://hdl.handle.net/1860/idea:6051

►

This dissertation describes four projects: 1) development of a procedure for quantifying multi-step reactions for the immobilization of protein on gold and silica surfaces; 2)… (more)

Subjects/Keywords: Chemistry; Polymers surfaces; Immobilized proteins

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APA (6^th Edition):

Sha, X. (2014). Synthesis and characterization of useful polymer-based surface layers and bulk materials. (Thesis). Drexel University. Retrieved from http://hdl.handle.net/1860/idea:6051

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):

Sha, Xue. “Synthesis and characterization of useful polymer-based surface layers and bulk materials.” 2014. Thesis, Drexel University. Accessed April 10, 2021. http://hdl.handle.net/1860/idea:6051.

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

MLA Handbook (7^th Edition):

Sha, Xue. “Synthesis and characterization of useful polymer-based surface layers and bulk materials.” 2014. Web. 10 Apr 2021.

Vancouver:

Sha X. Synthesis and characterization of useful polymer-based surface layers and bulk materials. [Internet] [Thesis]. Drexel University; 2014. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/1860/idea:6051.

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

Council of Science Editors:

Sha X. Synthesis and characterization of useful polymer-based surface layers and bulk materials. [Thesis]. Drexel University; 2014. Available from: http://hdl.handle.net/1860/idea:6051

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

Ryerson University

4. Tabatabaieyazdi, Mohammad. A computational study of surface-directed phase separation in polymer blends under temperature gradient.

Degree: 2014, Ryerson University

URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A2806

► To apprehend the real industrial behavior of polymeric materials phase separation phenomenon, the nonlinear Cahn-Hilliard theory incorporating the Flory-Huggins-de Gennes free energy theory was used… (more)

Subjects/Keywords: Polymers – Separation – Mathematical models; Polymers – Surfaces; Separation (Technology); Polymers – Industrial applications

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APA (6^th Edition):

Tabatabaieyazdi, M. (2014). A computational study of surface-directed phase separation in polymer blends under temperature gradient. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A2806

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):

Tabatabaieyazdi, Mohammad. “A computational study of surface-directed phase separation in polymer blends under temperature gradient.” 2014. Thesis, Ryerson University. Accessed April 10, 2021. https://digital.library.ryerson.ca/islandora/object/RULA%3A2806.

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

MLA Handbook (7^th Edition):

Tabatabaieyazdi, Mohammad. “A computational study of surface-directed phase separation in polymer blends under temperature gradient.” 2014. Web. 10 Apr 2021.

Vancouver:

Tabatabaieyazdi M. A computational study of surface-directed phase separation in polymer blends under temperature gradient. [Internet] [Thesis]. Ryerson University; 2014. [cited 2021 Apr 10]. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A2806.

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

Council of Science Editors:

Tabatabaieyazdi M. A computational study of surface-directed phase separation in polymer blends under temperature gradient. [Thesis]. Ryerson University; 2014. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A2806

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

Hong Kong University of Science and Technology

5. Wong, Kin Chiu. Investigation of surface mobility of rubbed polystyrene.

Degree: 2014, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-71828 ; https://doi.org/10.14711/thesis-b1345735 ; http://repository.ust.hk/ir/bitstream/1783.1-71828/1/th_redirect.html

► In this thesis, extensive experiments were performed using Atomic Force Microscopy (AFM) in studying the relaxation of surface roughness of PS thin film induced by… (more)

Subjects/Keywords: Polystyrene ; Polymers ; Thin films ; Materials ; Surfaces

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APA (6^th Edition):

Wong, K. C. (2014). Investigation of surface mobility of rubbed polystyrene. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-71828 ; https://doi.org/10.14711/thesis-b1345735 ; http://repository.ust.hk/ir/bitstream/1783.1-71828/1/th_redirect.html

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):

Wong, Kin Chiu. “Investigation of surface mobility of rubbed polystyrene.” 2014. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-71828 ; https://doi.org/10.14711/thesis-b1345735 ; http://repository.ust.hk/ir/bitstream/1783.1-71828/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Wong, Kin Chiu. “Investigation of surface mobility of rubbed polystyrene.” 2014. Web. 10 Apr 2021.

Vancouver:

Wong KC. Investigation of surface mobility of rubbed polystyrene. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2014. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-71828 ; https://doi.org/10.14711/thesis-b1345735 ; http://repository.ust.hk/ir/bitstream/1783.1-71828/1/th_redirect.html.

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

Council of Science Editors:

Wong KC. Investigation of surface mobility of rubbed polystyrene. [Thesis]. Hong Kong University of Science and Technology; 2014. Available from: http://repository.ust.hk/ir/Record/1783.1-71828 ; https://doi.org/10.14711/thesis-b1345735 ; http://repository.ust.hk/ir/bitstream/1783.1-71828/1/th_redirect.html

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

Hong Kong University of Science and Technology

6. Sun, Yijing. The size effect on the material properties of free standing polymers.

Degree: 2015, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-87536 ; https://doi.org/10.14711/thesis-b1514614 ; http://repository.ust.hk/ir/bitstream/1783.1-87536/1/th_redirect.html

► The research on mechanical properties of small size polymer materials is of great importance, due to the rapidly improvement of the fabrication of small devices.… (more)

▼ The research on mechanical properties of small size polymer materials is of great importance, due to the rapidly improvement of the fabrication of small devices. However, the study on the material properties of these small size polymer materials is still limited. The material properties of these small size ones could be of great difference compared with the bulk due to the size effect. Without a clear knowledge of the change of material properties in the materials, inaccurate designs of the devices will appear to influence the reliability. In this work, Parylene-C thin film was chosen as an example of semi-crystalline polymers to study the size dependent properties. The Parylene-C thin film microbridges with different microbridge thicknesses, widths and lengths were fabricated with MEMS techniques. By implementing the microbridge method, Young’s modulus and residual stress of Parylene-C thin films could be simultaneously determined and the size effect was investigated. Our work experimentally verified the extrinsic sample dimension such as microbridge width and the microbridge thickness significantly contributing to the decrease of the Young's modulus. Also, the glass transition temperatures measured by both microbridge tests and coefficient of thermal expansion tests revealed the dimension dependent behavior. This change in glass transition temperature causes the Young’s modulus-temperature curve shifting to influence the Young’s modulus at room temperature. The degree of crystallinity of the Parylene-C thin films also exhibited a size dependent behavior. The existence of free surfaces with less dense microstructure is the main reason that causes these size dependent behaviors. The surface layers, which have a smaller Young’s modulus, lower glass transition temperature, less crystallite regions, reduce the mechanical properties, the glass transition temperature and the crystallinity of Parylene-C microbridges. These surface layers were verified their existence by testing the distribution of the degree of crystallinity along the thickness direction, modulus mapping of the thin film cross section and HRTEM observation of the thin film cross section. On the other hand, by electrospinning method, the polyethylene terephthalate (PET) nanofibers were fabricated to the microbridges after bonding on a silicon substrate. The results from microbridge tests on PET fibers show that, the Young’s modulus has the size dependent behavior as well as the glass transition temperature in an opposite tendency. The Young’s modulus versus temperature curves explain these two tendency: the reduction of the fiber diameter causes the Young’s modulus versus temperature curve changes its shape. So that the statement “the smaller the stronger” may not be always true especially in high temperature. The increase of the Young’s modulus can be explained by the alignment of the molecule chain inside the fiber. This study is expected to contribute to the research on the size dependent mechanical and physical properties of semi-crystalline…

Subjects/Keywords: Thin films ; Size effects ; Polymers ; Surfaces (Technology)

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APA (6^th Edition):

Sun, Y. (2015). The size effect on the material properties of free standing polymers. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-87536 ; https://doi.org/10.14711/thesis-b1514614 ; http://repository.ust.hk/ir/bitstream/1783.1-87536/1/th_redirect.html

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):

Sun, Yijing. “The size effect on the material properties of free standing polymers.” 2015. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-87536 ; https://doi.org/10.14711/thesis-b1514614 ; http://repository.ust.hk/ir/bitstream/1783.1-87536/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Sun, Yijing. “The size effect on the material properties of free standing polymers.” 2015. Web. 10 Apr 2021.

Vancouver:

Sun Y. The size effect on the material properties of free standing polymers. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2015. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-87536 ; https://doi.org/10.14711/thesis-b1514614 ; http://repository.ust.hk/ir/bitstream/1783.1-87536/1/th_redirect.html.

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

Council of Science Editors:

Sun Y. The size effect on the material properties of free standing polymers. [Thesis]. Hong Kong University of Science and Technology; 2015. Available from: http://repository.ust.hk/ir/Record/1783.1-87536 ; https://doi.org/10.14711/thesis-b1514614 ; http://repository.ust.hk/ir/bitstream/1783.1-87536/1/th_redirect.html

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

University of Texas – Austin

7. Hahn, Jungseok. Deposition of cationic polymer micelles on planar and patterned SiO₂ surfaces.

Degree: PhD, Chemistry, 2003, University of Texas – Austin

URL: http://hdl.handle.net/2152/12109

Subjects/Keywords: Polymers; Micelles; Surfaces

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

APA (6^th Edition):

Hahn, J. (2003). Deposition of cationic polymer micelles on planar and patterned SiO₂ surfaces. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/12109

Chicago Manual of Style (16^th Edition):

Hahn, Jungseok. “Deposition of cationic polymer micelles on planar and patterned SiO₂ surfaces.” 2003. Doctoral Dissertation, University of Texas – Austin. Accessed April 10, 2021. http://hdl.handle.net/2152/12109.

MLA Handbook (7^th Edition):

Hahn, Jungseok. “Deposition of cationic polymer micelles on planar and patterned SiO₂ surfaces.” 2003. Web. 10 Apr 2021.

Vancouver:

Hahn J. Deposition of cationic polymer micelles on planar and patterned SiO₂ surfaces. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2003. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2152/12109.

Council of Science Editors:

Hahn J. Deposition of cationic polymer micelles on planar and patterned SiO₂ surfaces. [Doctoral Dissertation]. University of Texas – Austin; 2003. Available from: http://hdl.handle.net/2152/12109

Ryerson University

8. Mastan, Erlita. Surface Modification of Polyethylene Film by Catalytic Ozonation.

Degree: 2010, Ryerson University

URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A1665

► The hydrophobicity of polymer surfaces limits their applications in many areas such as for use as biomaterials and in membrane filtration. One solution to this… (more)

▼ The hydrophobicity of polymer surfaces limits their applications in many areas such as for use as biomaterials and in membrane filtration. One solution to this problem is to modify the polymer surface by ozonation. Ozonation introduces peroxide groups on polymer surface, which can initiate graft polymerization of monomers with hydrophilic groups, and thus improves the hydrophilicity of the polymer surfaces. The concentration of peroxide groups formed can be used to indicate the effectiveness of ozonation process. In this study, the low cost polyethylene film was selected as a model polymer film to conduct the investigation. Ozonation treatment was carried out in both gaseous and aqueous phases, to study the contribution of hydroxyl radical in the generation of peroxide group. Results revealed that aqueous ozonation generated slightly less peroxide than gaseous ozonation. However, the addition of soluble catalyst, copper (II) sulfate, to the aqueous ozonation resulted in 18% more peroxide concentration than that yielded by gaseous ozonation. Further investigation indicated that 0.05 g/L copper (II) sulfate was the optimal catalyst dose, and the optimal pH was approximately 5.60. A 19% reduction in tensile strength of the film was observed after 120 minutes of catalytic ozonation. Upon addition of a radical scavenger, tert-butyl alcohol (TBA), a decrease of 12% in the peroxide concentration was observed for catalytic ozonation with 0.1 mol/L TBA. This decrease indicated that both ozone and hydroxyl radical contributed to the peroxide generation in catalytic ozonation. A reaction mechanism for aqueous ozonation of polyethylene was proposed in this study by combining the reaction mechanism for gaseous ozonation of polyethylene and the decomposition mechanism of ozone in water. The experimental data found in this study verified the exponential function obtained for peroxide concentration. This verification was obtained for various ozonation time and dose ranging from 15 – 120 minutes and 1.0 – 3.0 wt%, respectively. Advisors/Committee Members: Ryerson University (Degree grantor).

Subjects/Keywords: Polymerization – Surfaces; Polyethylene; Ozonization; Polymers – Surfaces; Surface chemistry; Surface – Preparation

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APA (6^th Edition):

Mastan, E. (2010). Surface Modification of Polyethylene Film by Catalytic Ozonation. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A1665

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):

Mastan, Erlita. “Surface Modification of Polyethylene Film by Catalytic Ozonation.” 2010. Thesis, Ryerson University. Accessed April 10, 2021. https://digital.library.ryerson.ca/islandora/object/RULA%3A1665.

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

MLA Handbook (7^th Edition):

Mastan, Erlita. “Surface Modification of Polyethylene Film by Catalytic Ozonation.” 2010. Web. 10 Apr 2021.

Vancouver:

Mastan E. Surface Modification of Polyethylene Film by Catalytic Ozonation. [Internet] [Thesis]. Ryerson University; 2010. [cited 2021 Apr 10]. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1665.

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

Council of Science Editors:

Mastan E. Surface Modification of Polyethylene Film by Catalytic Ozonation. [Thesis]. Ryerson University; 2010. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1665

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

University of Georgia

9. Arnold, Rachelle Marie. Coalescence of postpolymerization modification and click chemistry.

Degree: 2014, University of Georgia

URL: http://hdl.handle.net/10724/30851

► Using polymer science as a fundamental platform allows for a true interdisciplinary approach to create sophisticated and adaptable surfaces when combined with biology, materials science,… (more)

Subjects/Keywords: CLICK CHEMISTRY; SURFACE-BOUND POLYMERS; POSTPOLYMERIZATION MODIFICATION; COMPLEX SURFACES; PATTERNED SURFACES

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APA (6^th Edition):

Arnold, R. M. (2014). Coalescence of postpolymerization modification and click chemistry. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/30851

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):

Arnold, Rachelle Marie. “Coalescence of postpolymerization modification and click chemistry.” 2014. Thesis, University of Georgia. Accessed April 10, 2021. http://hdl.handle.net/10724/30851.

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

MLA Handbook (7^th Edition):

Arnold, Rachelle Marie. “Coalescence of postpolymerization modification and click chemistry.” 2014. Web. 10 Apr 2021.

Vancouver:

Arnold RM. Coalescence of postpolymerization modification and click chemistry. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/10724/30851.

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

Council of Science Editors:

Arnold RM. Coalescence of postpolymerization modification and click chemistry. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/30851

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

University of Akron

10. Liu, Yawen. Research of Two Types of Slippery Surfaces: Slippery Polydimethylsiloxane Elastomers and Polyelectrolyte Multilayers Slippery Surfaces.

Degree: MS, Polymer Engineering, 2018, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1530877456582558

► Slippery liquid-infused porous surfaces (SLIPS) are surfaces which are inspired by the Nepenthes pitcher plants and that have good ability to repel liquids such as… (more)

▼ Slippery liquid-infused porous surfaces (SLIPS) are surfaces which are inspired by the Nepenthes pitcher plants and that have good ability to repel liquids such as water. They show low contact angle hysteresis and comparatively high contact angle. SLIPS has a wide range of potential application in various industries such as personal care and automobiles. In this thesis, two types of slippery surfaces based on SLIPS model are fabricated and investigated. Silicone oil infused polydimethylsiloxane (PDMS) elastomer slippery surfaces were investigated first. A facile fabrication method of slippery PDMS gel is offered in this thesis to obtain the slippery PDMS gel in a shorter time. The slippery property and longevity of slippery PDMS gels are tested by different solvents, sauce, and at different strain. Besides, the facile method of fabricating slippery and conductive PDMS gels are explored here to make functional PDMS gel for the application in endoscope. The second part in this thesis researches the water droplet impact on polyelectrolyte multilayer lubricant infused slippery surfaces fabricated by Layer-by-Layer (LbL) technique. Nano/microstructured polyelectrolyte substrates are used to lock the lubricating fluid onto the surface. We studied the impact of water drops on our slippery surface as well as on dry, superhydrophobic surfaces. The droplet impact on superhydrophobic surfaces and SLIPS are different, and therefore by combining these two different types of surfaces we are able to create different effects of water drop impact. The effect of the viscosity of the lubricant is also studied by observing the movement of the water droplet a boundary line created by patterning a surface to include both types of water repellency (superhydrophobicity and SLIPS). One advantage of using lubricants of different viscosities is to isolate the influence of thermodynamics and dynamics between our surface and the water. We found that water droplet when dropped onto such a boundary tends to move to the SLIPS portion of the surface. The changes in water contact line are imaged with a high speed camera. The tilt of the surface was also investigated in this work. These preliminary results give some insight into how surfaces might be created that can be used to actively manipulate the motion of water drops. Advisors/Committee Members: Zacharia, Nicole (Advisor), Zhu, Yu (Committee Chair).

Subjects/Keywords: Polymers; Engineering; Experiments; slippery surfaces; slippery liquid infused porous surfaces; PDMS

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

APA (6^th Edition):

Liu, Y. (2018). Research of Two Types of Slippery Surfaces: Slippery Polydimethylsiloxane Elastomers and Polyelectrolyte Multilayers Slippery Surfaces. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1530877456582558

Chicago Manual of Style (16^th Edition):

Liu, Yawen. “Research of Two Types of Slippery Surfaces: Slippery Polydimethylsiloxane Elastomers and Polyelectrolyte Multilayers Slippery Surfaces.” 2018. Masters Thesis, University of Akron. Accessed April 10, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1530877456582558.

MLA Handbook (7^th Edition):

Liu, Yawen. “Research of Two Types of Slippery Surfaces: Slippery Polydimethylsiloxane Elastomers and Polyelectrolyte Multilayers Slippery Surfaces.” 2018. Web. 10 Apr 2021.

Vancouver:

Liu Y. Research of Two Types of Slippery Surfaces: Slippery Polydimethylsiloxane Elastomers and Polyelectrolyte Multilayers Slippery Surfaces. [Internet] [Masters thesis]. University of Akron; 2018. [cited 2021 Apr 10]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1530877456582558.

Council of Science Editors:

Liu Y. Research of Two Types of Slippery Surfaces: Slippery Polydimethylsiloxane Elastomers and Polyelectrolyte Multilayers Slippery Surfaces. [Masters Thesis]. University of Akron; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1530877456582558

Hong Kong University of Science and Technology

11. Zhang, Xueyun. Polymer thin film dewetting : fundamentals and applications.

Degree: 2005, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-5446 ; https://doi.org/10.14711/thesis-b854860 ; http://repository.ust.hk/ir/bitstream/1783.1-5446/1/th_redirect.html

► This thesis includes two parts. One is the application of dewetting of polymer films in the fabrication of micrometer scale surface patterns. The other is… (more)

Subjects/Keywords: Polymers – Surfaces ; Thin films – Surfaces ; Wetting

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APA (6^th Edition):

Zhang, X. (2005). Polymer thin film dewetting : fundamentals and applications. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-5446 ; https://doi.org/10.14711/thesis-b854860 ; http://repository.ust.hk/ir/bitstream/1783.1-5446/1/th_redirect.html

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):

Zhang, Xueyun. “Polymer thin film dewetting : fundamentals and applications.” 2005. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-5446 ; https://doi.org/10.14711/thesis-b854860 ; http://repository.ust.hk/ir/bitstream/1783.1-5446/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Zhang, Xueyun. “Polymer thin film dewetting : fundamentals and applications.” 2005. Web. 10 Apr 2021.

Vancouver:

Zhang X. Polymer thin film dewetting : fundamentals and applications. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2005. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-5446 ; https://doi.org/10.14711/thesis-b854860 ; http://repository.ust.hk/ir/bitstream/1783.1-5446/1/th_redirect.html.

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

Council of Science Editors:

Zhang X. Polymer thin film dewetting : fundamentals and applications. [Thesis]. Hong Kong University of Science and Technology; 2005. Available from: http://repository.ust.hk/ir/Record/1783.1-5446 ; https://doi.org/10.14711/thesis-b854860 ; http://repository.ust.hk/ir/bitstream/1783.1-5446/1/th_redirect.html

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

Hong Kong University of Science and Technology

12. Wang, Yongjian. Dewetting instability of polymer thin film.

Degree: 2006, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-2706 ; https://doi.org/10.14711/thesis-b924269 ; http://repository.ust.hk/ir/bitstream/1783.1-2706/1/th_redirect.html

► There is a long time controversy on whether unstable polymer liquid films break up via spinodal destability or nucleation and growth when the bicontinuous morphology… (more)

Subjects/Keywords: Polymers – Surfaces ; Thin films – Surfaces ; Wetting

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APA (6^th Edition):

Wang, Y. (2006). Dewetting instability of polymer thin film. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-2706 ; https://doi.org/10.14711/thesis-b924269 ; http://repository.ust.hk/ir/bitstream/1783.1-2706/1/th_redirect.html

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):

Wang, Yongjian. “Dewetting instability of polymer thin film.” 2006. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-2706 ; https://doi.org/10.14711/thesis-b924269 ; http://repository.ust.hk/ir/bitstream/1783.1-2706/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Wang, Yongjian. “Dewetting instability of polymer thin film.” 2006. Web. 10 Apr 2021.

Vancouver:

Wang Y. Dewetting instability of polymer thin film. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2006. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-2706 ; https://doi.org/10.14711/thesis-b924269 ; http://repository.ust.hk/ir/bitstream/1783.1-2706/1/th_redirect.html.

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

Council of Science Editors:

Wang Y. Dewetting instability of polymer thin film. [Thesis]. Hong Kong University of Science and Technology; 2006. Available from: http://repository.ust.hk/ir/Record/1783.1-2706 ; https://doi.org/10.14711/thesis-b924269 ; http://repository.ust.hk/ir/bitstream/1783.1-2706/1/th_redirect.html

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

Portland State University

13. Yuwen, Jing. Polymer-Based Photoactive Surface for the Efficient Immobilization of Nanoparticles, Polymers, Graphene and Carbohydrates.

Degree: MS(M.S.) in Chemistry, Chemistry, 2011, Portland State University

URL: https://pdxscholar.library.pdx.edu/open_access_etds/413

► This thesis focuses on developing a new photocoupling surface, base on polyallyamine (PAAm), to increase the efficiency of the photocoupling agent perfluorophenyl azide (PFPA)… (more)

Subjects/Keywords: Covalent immobilization; Polymer-based photocoupling surface; Perfluorophenyl azide; Polyallyamine; Polymers – Surfaces; Surfaces (Technology); Nanotechnology

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APA (6^th Edition):

Yuwen, J. (2011). Polymer-Based Photoactive Surface for the Efficient Immobilization of Nanoparticles, Polymers, Graphene and Carbohydrates. (Masters Thesis). Portland State University. Retrieved from https://pdxscholar.library.pdx.edu/open_access_etds/413

Chicago Manual of Style (16^th Edition):

Yuwen, Jing. “Polymer-Based Photoactive Surface for the Efficient Immobilization of Nanoparticles, Polymers, Graphene and Carbohydrates.” 2011. Masters Thesis, Portland State University. Accessed April 10, 2021. https://pdxscholar.library.pdx.edu/open_access_etds/413.

MLA Handbook (7^th Edition):

Yuwen, Jing. “Polymer-Based Photoactive Surface for the Efficient Immobilization of Nanoparticles, Polymers, Graphene and Carbohydrates.” 2011. Web. 10 Apr 2021.

Vancouver:

Yuwen J. Polymer-Based Photoactive Surface for the Efficient Immobilization of Nanoparticles, Polymers, Graphene and Carbohydrates. [Internet] [Masters thesis]. Portland State University; 2011. [cited 2021 Apr 10]. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/413.

Council of Science Editors:

Yuwen J. Polymer-Based Photoactive Surface for the Efficient Immobilization of Nanoparticles, Polymers, Graphene and Carbohydrates. [Masters Thesis]. Portland State University; 2011. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/413

Hong Kong University of Science and Technology

14. Zhang, Xueyun. Wettability tuning by surface modification.

Degree: 2009, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-5944 ; https://doi.org/10.14711/thesis-b1041237 ; http://repository.ust.hk/ir/bitstream/1783.1-5944/1/th_redirect.html

► Controlling the wettability of solid materials is a key issue in surface engineering. The objective of this thesis is to control the wettability of solid… (more)

▼ Controlling the wettability of solid materials is a key issue in surface engineering. The objective of this thesis is to control the wettability of solid substrates via various surface modifications. The wettability tuning in this study includes two opposite aspects. One is to enhance the wetting between the substrates and the polymer films. The other is to enhance the hydrophobicity of the solid substrates. The wetting between silicon substrates and the polystyrene (PS) films are improved by end-grafting a layer of polystyrene brush to the substrates. The wettability and the equilibrium structure of PS-melt/PS-brush/SiO2/Si system were then studied. It was found that when the molecular weight of the melt or the grafting density of the brush decreases, the thickness of the residual film increases and the contact angle decreases, both indicating improved wettability. By comparing the measurements with recent results of the self-consistent field theory, good agreement is found. The hydrophobicity of the solid substrates is enhanced through physically roughing the solid surfaces. The well-defined microscaled periodic structures, including connected grid structure, discrete pillar structure and parallel strip structure, were prepared on silicon surfaces by photolithography. The sliding behavior, water contact angle, and self-cleaning ability are compared among different surface topologies. The correlation between sliding angle, contact angle hysteresis, drop base width and drop volume was investigated. The wettability and the self-cleaning property were found to be surface structure dependent. The water apparent contact angle of the grid patterns agrees with the prediction by Cassie equation, but that of the pillar patterns is much larger than the prediction. Nevertheless, the pillar patterns exhibit inferior self-cleaning ability, contrary to conventional conception. The contact line of water drops were found to move in a stick-jump manner on patterned surfaces both from theoretical simulation and experiment measurements. The oscillation amplitude of the contact angle decreased with decreasing strip width. In addition, the jumping distances of the contact lines, for both advancing and receding water drops, were nearly equal to the strip period. The results of wettability mechanism studied in this thesis provide a guideline for designing surfaces with controlled wettability.

Subjects/Keywords: Solids – Surfaces ; Polymers – Surfaces ; Wetting ; Surfaces (Physics)

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APA (6^th Edition):

Zhang, X. (2009). Wettability tuning by surface modification. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-5944 ; https://doi.org/10.14711/thesis-b1041237 ; http://repository.ust.hk/ir/bitstream/1783.1-5944/1/th_redirect.html

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):

Zhang, Xueyun. “Wettability tuning by surface modification.” 2009. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-5944 ; https://doi.org/10.14711/thesis-b1041237 ; http://repository.ust.hk/ir/bitstream/1783.1-5944/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Zhang, Xueyun. “Wettability tuning by surface modification.” 2009. Web. 10 Apr 2021.

Vancouver:

Zhang X. Wettability tuning by surface modification. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2009. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-5944 ; https://doi.org/10.14711/thesis-b1041237 ; http://repository.ust.hk/ir/bitstream/1783.1-5944/1/th_redirect.html.

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

Council of Science Editors:

Zhang X. Wettability tuning by surface modification. [Thesis]. Hong Kong University of Science and Technology; 2009. Available from: http://repository.ust.hk/ir/Record/1783.1-5944 ; https://doi.org/10.14711/thesis-b1041237 ; http://repository.ust.hk/ir/bitstream/1783.1-5944/1/th_redirect.html

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

University of Oxford

15. Thomas, Matthew Rhys. Polyvinyl alcohol surface modification.

Degree: PhD, 2011, University of Oxford

URL: http://ora.ox.ac.uk/objects/uuid:279fe53b-7d61-43de-a91a-be658dd01eda ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555358

► Poly(vinyl alcohol) (PVA) is a polymer used in numerous applications, principally those in which its high water solubility is a desirable asset. However there are… (more)

▼ Poly(vinyl alcohol) (PVA) is a polymer used in numerous applications, principally those in which its high water solubility is a desirable asset. However there are also areas where PVA is limited by its inherent solubility (for example some specific environments in the biomedical field). This work has sought to overcome such limits by manipulating the surface of PVA in order to propose various means by which the surface solvent resistance might be increased while maintaining the bulk properties of the polymer. Both chemical and physical modifications have been tried and in each case progress has been made towards insolubilizing a single surface of the polymer when in film form. Grafting various species onto the surface of PVA was successfully performed. It is believed that such species bonded to the PVA via attachment to the hydroxyl groups (though this has not been proven conclusively). The data contained herein has led to the conclusion that the primary factor in reducing solubility this way is the removal of the hydroxyl groups, and not the attachment of specifically highly hydrophobic molecules. Introducing permanent cross-links into the surface region has been attempted via various routes. The data recorded shows promise however the system is far from optimised. The biggest challenge remaining is to optimise the depth of material cross-linked. Some steps have been made towards understanding and controlling this parameter though there is much scope for further investigation. The methods used have built on those used for bulk cross-linking and as such are new for the case of surface specific treatment. An interesting phenomenon in some semi-crystalline polymers reported in recent years is that of surface specific crystallization. This effect has been successfully induced and observed in PVA to produce what is believed to be a highly crystalline surface layer, and crystalline regions of PVA are generally accepted to be more water resistant than amorphous ones. In summary, in this work several surface-specific treatments for PVA have been trialled, providing options for post-film forming modification to reduce the surface water sensitivity whilst retaining the bulk properties of the polymer.

Subjects/Keywords: 667.9; Materials Sciences; Surfaces; Polymers; polyvinyl alcohol; pva; pvoh; surface modification

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APA (6^th Edition):

Thomas, M. R. (2011). Polyvinyl alcohol surface modification. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:279fe53b-7d61-43de-a91a-be658dd01eda ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555358

Chicago Manual of Style (16^th Edition):

Thomas, Matthew Rhys. “Polyvinyl alcohol surface modification.” 2011. Doctoral Dissertation, University of Oxford. Accessed April 10, 2021. http://ora.ox.ac.uk/objects/uuid:279fe53b-7d61-43de-a91a-be658dd01eda ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555358.

MLA Handbook (7^th Edition):

Thomas, Matthew Rhys. “Polyvinyl alcohol surface modification.” 2011. Web. 10 Apr 2021.

Vancouver:

Thomas MR. Polyvinyl alcohol surface modification. [Internet] [Doctoral dissertation]. University of Oxford; 2011. [cited 2021 Apr 10]. Available from: http://ora.ox.ac.uk/objects/uuid:279fe53b-7d61-43de-a91a-be658dd01eda ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555358.

Council of Science Editors:

Thomas MR. Polyvinyl alcohol surface modification. [Doctoral Dissertation]. University of Oxford; 2011. Available from: http://ora.ox.ac.uk/objects/uuid:279fe53b-7d61-43de-a91a-be658dd01eda ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555358

Hong Kong University of Science and Technology

16. Wong, Wai Chung. Microwave-assisted dewetting.

Degree: 2010, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-7086 ; https://doi.org/10.14711/thesis-b1129760 ; http://repository.ust.hk/ir/bitstream/1783.1-7086/1/th_redirect.html

► Dewetting is the process that is the reverse of wetting, in which a film of fluid tends to transform from a film to droplets. This… (more)

Subjects/Keywords: Wetting ; Microwaves ; Polymers – Surfaces

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APA (6^th Edition):

Wong, W. C. (2010). Microwave-assisted dewetting. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-7086 ; https://doi.org/10.14711/thesis-b1129760 ; http://repository.ust.hk/ir/bitstream/1783.1-7086/1/th_redirect.html

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):

Wong, Wai Chung. “Microwave-assisted dewetting.” 2010. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-7086 ; https://doi.org/10.14711/thesis-b1129760 ; http://repository.ust.hk/ir/bitstream/1783.1-7086/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Wong, Wai Chung. “Microwave-assisted dewetting.” 2010. Web. 10 Apr 2021.

Vancouver:

Wong WC. Microwave-assisted dewetting. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2010. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-7086 ; https://doi.org/10.14711/thesis-b1129760 ; http://repository.ust.hk/ir/bitstream/1783.1-7086/1/th_redirect.html.

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

Council of Science Editors:

Wong WC. Microwave-assisted dewetting. [Thesis]. Hong Kong University of Science and Technology; 2010. Available from: http://repository.ust.hk/ir/Record/1783.1-7086 ; https://doi.org/10.14711/thesis-b1129760 ; http://repository.ust.hk/ir/bitstream/1783.1-7086/1/th_redirect.html

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

Hong Kong University of Science and Technology

17. Saleem, Junaid. Synthesis & applications of porous polyolefin films.

Degree: 2014, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-83584 ; https://doi.org/10.14711/thesis-b1451943 ; http://repository.ust.hk/ir/bitstream/1783.1-83584/1/th_redirect.html

► The aim of this study is to develop multifunctional polymer films using polyethylene for energy and environmental applications. The first part is related to the… (more)

▼ The aim of this study is to develop multifunctional polymer films using polyethylene for energy and environmental applications. The first part is related to the preparation of super oil sorbent polymer (oil-SAP) sheets for efficient oil spill remedy while the second part is focused on the production of a novel composite electrolyte membrane for fuel cell applications. Thermoplastics (such as polypropylene, polyethylene, polyethylene terephthalate (PET), high density polyethylene (HDPE) etc.) are significant components of municipal solid waste. A huge quantity of plastic waste is disposed of each year and is mostly either discarded in landfills or incinerated. On the other hand, the usage of synthetic polymers as oil sorbents, in particular, polyolefins, including polypropylene (PP), and polyethylene (PE) are the most commonly used oil sorbent materials mainly due to their low cost. However, they possess relatively low oil absorption capacities. Attempts at trying to increase the surface to thickness ratio for improving uptake capacity makes them vulnerable to breakage and impractical to be used in most oil spill applications. Besides the saturation contact time of these sorbents with oil is too long to be used in applications where the first few hours are crucial as the critical stage of spreading occurs within the first hour. In this work, we provide an innovative way to produce a value-added product such as oil-sorbent films from waste HDPE bottles for rapid oil spill remedy. In order to develop a novel process, we first prepared our oil-sorbent sample using virgin polyethylene powder to establish a bench mark and then to extend this study for waste HDPE bottles. The presented sorbent exhibits extremely high uptake capacity, excellent oil uptake speed and high mechanical strength. Moreover, dynamic dripping profile and kinetics modeling tests of the oil sorption are also provided. The experimental results show a good correlation with the pseudo-second order model. A novel composite electrolyte membrane, consisting of polyethylene substrate and Nafion ionomer, was also manufactured. Nafion is by far the most widely used electrolyte in the fuel cell industry because of its excellent proton conductivity. Yet, it suffers from several drawbacks such as high fuel crossover and low mechanical strength, which lower the fuel cell performance and disturb the structural integrity. In order to deal with these problems, we have prepared an NPE (Nafion-polyethylene) composite that is composed of a porous substrate and a filling electrolyte. Nafion was used as a filling electrolyte and was impregnated into the pores of porous substrate made up of polyethylene. The polymer backbone serves as a structural support and blocks the crossover while the impregnated Nafion molecules provide the proton conducting path. Systematic characterization of NPE is also presented.

Subjects/Keywords: Polyethylene ; Thin films ; Polymerization ; Polymers ; Surfaces ; Polyolefins ; Porous materials

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APA (6^th Edition):

Saleem, J. (2014). Synthesis & applications of porous polyolefin films. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-83584 ; https://doi.org/10.14711/thesis-b1451943 ; http://repository.ust.hk/ir/bitstream/1783.1-83584/1/th_redirect.html

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):

Saleem, Junaid. “Synthesis & applications of porous polyolefin films.” 2014. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-83584 ; https://doi.org/10.14711/thesis-b1451943 ; http://repository.ust.hk/ir/bitstream/1783.1-83584/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Saleem, Junaid. “Synthesis & applications of porous polyolefin films.” 2014. Web. 10 Apr 2021.

Vancouver:

Saleem J. Synthesis & applications of porous polyolefin films. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2014. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-83584 ; https://doi.org/10.14711/thesis-b1451943 ; http://repository.ust.hk/ir/bitstream/1783.1-83584/1/th_redirect.html.

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

Council of Science Editors:

Saleem J. Synthesis & applications of porous polyolefin films. [Thesis]. Hong Kong University of Science and Technology; 2014. Available from: http://repository.ust.hk/ir/Record/1783.1-83584 ; https://doi.org/10.14711/thesis-b1451943 ; http://repository.ust.hk/ir/bitstream/1783.1-83584/1/th_redirect.html

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

Georgia Tech

18. Tobiesen, Finn Andrew. A method for grafting poly(acrylic acid) onto nylon 6,6 using amine end-groups on the nylon surface.

Degree: MS, Polymer chemistry, 2000, Georgia Tech

URL: http://hdl.handle.net/1853/29994

Subjects/Keywords: Polymers Surfaces; Acrylic acid; Adhesion

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APA (6^th Edition):

Tobiesen, F. A. (2000). A method for grafting poly(acrylic acid) onto nylon 6,6 using amine end-groups on the nylon surface. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/29994

Chicago Manual of Style (16^th Edition):

Tobiesen, Finn Andrew. “A method for grafting poly(acrylic acid) onto nylon 6,6 using amine end-groups on the nylon surface.” 2000. Masters Thesis, Georgia Tech. Accessed April 10, 2021. http://hdl.handle.net/1853/29994.

MLA Handbook (7^th Edition):

Tobiesen, Finn Andrew. “A method for grafting poly(acrylic acid) onto nylon 6,6 using amine end-groups on the nylon surface.” 2000. Web. 10 Apr 2021.

Vancouver:

Tobiesen FA. A method for grafting poly(acrylic acid) onto nylon 6,6 using amine end-groups on the nylon surface. [Internet] [Masters thesis]. Georgia Tech; 2000. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/1853/29994.

Council of Science Editors:

Tobiesen FA. A method for grafting poly(acrylic acid) onto nylon 6,6 using amine end-groups on the nylon surface. [Masters Thesis]. Georgia Tech; 2000. Available from: http://hdl.handle.net/1853/29994

Loughborough University

19. Fletcher, James R. Studies of novel perfluoroalkyl derivatives of azobenzene in solution and on surfaces.

Degree: PhD, 2011, Loughborough University

URL: http://hdl.handle.net/2134/8416

► Azobenzene based photochromics have been studied widely since the development of the first azo dye, Mauvine, by Perkin in 1856. Azo based dyes have been… (more)

▼ Azobenzene based photochromics have been studied widely since the development of the first azo dye, Mauvine, by Perkin in 1856. Azo based dyes have been widely used in industry for over a century. The desire to study them arose from their ease of synthesis and the wide availability of colours which can be tuned by manipulation of the chromophores on the azo molecule itself. The ability of azobenzene to photoisomerise between trans and cis states is widely known. The change in dipole moment affords the ability to fine-tune surfaces via photoisomerisation of the azo molecule. The objective of this investigation was to alter the surface properties of a variety of substrates via the photoisomerisation reaction of several perfluoroalkyl derived azobenzene compounds. These compounds are novel and are based on the idea of the fluoroalkyl chain creating a superhydrophobic surface, similar to Teflon, which would change surface energy upon isomerisation of the azobenzene molecule to give a more hydrophilic surface. This would ultimately then be utilised to coat a fabric surface to provide a photosensitive coating. The compounds used in this work (Admat 1 and 2 and Cfam derivatives) were synthesised in order for their photochemistry in solution and on surfaces to be investigated. The studies began with the photoisomerisation investigations in solution and the calculation of the rate constant and finally the activation energies of these compounds in a variety of common solvents. Interesting results were observed in polar protic solvents which were investigated further. The discovery that aggregation occurred in polar protic solvents due to solubility issues, which in turn led to a fast rate constant was a key finding of the solution work. The surface studies began with the investigation of cellulose as a substrate due to the structural similarity it has with cotton. The azo compounds were derivatised using cyanuric chloride to afford a triazinyl group which was able to attach to the surface of the cellulose via the hydroxyl groups on the surface.

Subjects/Keywords: 547; Azobenzene; Photochromic; Surfaces; Silica; Chitosan; Contact angles; Polymers cellulose; Photoisomerisation

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APA (6^th Edition):

Fletcher, J. R. (2011). Studies of novel perfluoroalkyl derivatives of azobenzene in solution and on surfaces. (Doctoral Dissertation). Loughborough University. Retrieved from http://hdl.handle.net/2134/8416

Chicago Manual of Style (16^th Edition):

Fletcher, James R. “Studies of novel perfluoroalkyl derivatives of azobenzene in solution and on surfaces.” 2011. Doctoral Dissertation, Loughborough University. Accessed April 10, 2021. http://hdl.handle.net/2134/8416.

MLA Handbook (7^th Edition):

Fletcher, James R. “Studies of novel perfluoroalkyl derivatives of azobenzene in solution and on surfaces.” 2011. Web. 10 Apr 2021.

Vancouver:

Fletcher JR. Studies of novel perfluoroalkyl derivatives of azobenzene in solution and on surfaces. [Internet] [Doctoral dissertation]. Loughborough University; 2011. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2134/8416.

Council of Science Editors:

Fletcher JR. Studies of novel perfluoroalkyl derivatives of azobenzene in solution and on surfaces. [Doctoral Dissertation]. Loughborough University; 2011. Available from: http://hdl.handle.net/2134/8416

University of Texas – Austin

20. Huang, Yu. Physical aging of thin glassy polymer films.

Degree: PhD, Chemical Engineering, 2005, University of Texas – Austin

URL: http://hdl.handle.net/2152/1940

► This research work was designed to systematically investigate the physical aging of glassy polymer thin films in terms of the effects of chemical structure of… (more)

▼ This research work was designed to systematically investigate the physical aging of glassy polymer thin films in terms of the effects of chemical structure of the polymer, film thickness, aging temperature and molecular weight. This research is fundamental in nature but is of both scientific interest and practical importance, especially to gas separation industry where polymer thin films are essentially used as the selective layer in the asymmetric or composite membrane structures. Three glassy polymers relevant to gas separation industry, polysulfone, a polyimide and poly(2,6-dimethyl-1,4-phenylene oxide) were studied; these polymer films having thicknesses from ~ 400 nm to 62 µm were subjected to isothermal aging at three temperatures, ranging from 35 to 55ºC, for a period of up to ~ 400 days. Two major techniques were employed in probing the aging process including gas permeability measurement and refractive index measurement. Rigorous methodologies have been developed for studying the physical aging of free-standing thin polymer films to eliminate any other external effect that might impact the aging behavior. Ellipsometry has been employed to determine the thicknesses and refractive indices of these thin films. By using the methods developed, the reproducibility of gas permeability and refractive index change during physical aging was demonstrated as well as the thermoreversibility of physical aging. Ellipsometry revealed that this procedure leads to isotropic films having initial characteristics independent of film thickness. A substantial aging response via the permeability and refractive index changes, attributed to a decrease in polymer free volume, was observed at temperatures more than 150°C below Tg for thin films of each polymer compared to what is observed for the bulk polymers. The Lorentz-Lorenz equation was used to relate changes in refractive index to densification, or volume relaxation, with aging time. The films with thicknesses of approximately 400 nm of the three polymers exhibit an oxygen permeability decrease by as much as two-fold or more, about 14 to 15% increase in O2/N2 selectivity and about 0.6 to 1.5% increase in density at an aging time of 1,000 hours. Advisors/Committee Members: Paul, Donald R. (advisor).

Subjects/Keywords: Thin films – Materials; Polymers – Surfaces

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APA (6^th Edition):

Huang, Y. (2005). Physical aging of thin glassy polymer films. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/1940

Chicago Manual of Style (16^th Edition):

Huang, Yu. “Physical aging of thin glassy polymer films.” 2005. Doctoral Dissertation, University of Texas – Austin. Accessed April 10, 2021. http://hdl.handle.net/2152/1940.

MLA Handbook (7^th Edition):

Huang, Yu. “Physical aging of thin glassy polymer films.” 2005. Web. 10 Apr 2021.

Vancouver:

Huang Y. Physical aging of thin glassy polymer films. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2005. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2152/1940.

Council of Science Editors:

Huang Y. Physical aging of thin glassy polymer films. [Doctoral Dissertation]. University of Texas – Austin; 2005. Available from: http://hdl.handle.net/2152/1940

Michigan State University

21. Ganesan, Skanth. Synthesis of ultrathin polymer films by surface-initiated radical polymerization from gold surfaces.

Degree: MS, Department of Chemistry, 2001, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:30985

Subjects/Keywords: Polymerization; Plastic films; Polymers – Surfaces

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APA (6^th Edition):

Ganesan, S. (2001). Synthesis of ultrathin polymer films by surface-initiated radical polymerization from gold surfaces. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:30985

Chicago Manual of Style (16^th Edition):

Ganesan, Skanth. “Synthesis of ultrathin polymer films by surface-initiated radical polymerization from gold surfaces.” 2001. Masters Thesis, Michigan State University. Accessed April 10, 2021. http://etd.lib.msu.edu/islandora/object/etd:30985.

MLA Handbook (7^th Edition):

Ganesan, Skanth. “Synthesis of ultrathin polymer films by surface-initiated radical polymerization from gold surfaces.” 2001. Web. 10 Apr 2021.

Vancouver:

Ganesan S. Synthesis of ultrathin polymer films by surface-initiated radical polymerization from gold surfaces. [Internet] [Masters thesis]. Michigan State University; 2001. [cited 2021 Apr 10]. Available from: http://etd.lib.msu.edu/islandora/object/etd:30985.

Council of Science Editors:

Ganesan S. Synthesis of ultrathin polymer films by surface-initiated radical polymerization from gold surfaces. [Masters Thesis]. Michigan State University; 2001. Available from: http://etd.lib.msu.edu/islandora/object/etd:30985

22. Gevaux, Laure. Elastomères à base de polymères hydrolysables : une nouvelle statégie de revêtement antifouling : Hydrolyzable polymer-based elastomers : a new strategy of antifouling coating.

Degree: Docteur es, Chimie, 2019, Toulon

URL: http://www.theses.fr/2019TOUL0011

►

Dans un contexte où les revêtements antifouling à base de biocides toxiques sont de plus en plus réglementés, il est indispensable de développer des solutions… (more)

▼

Dans un contexte où les revêtements antifouling à base de biocides toxiques sont de plus en plus réglementés, il est indispensable de développer des solutions plus écologiques telles que les Fouling Release Coatings (FRCs) principalement à base d'élastomères silicones. Les FRCs peuvent relarguer facilement la salissure marine grâce à leurs propriétés physico-chimiques telles que leur faible énergie libre de surface et leur faible module élastique qui minimisent les interactions entre la salissure et la surface et diminuent les forces d'adhérence. Une autre catégorie de revêtements antifouling nommée Self-Polishing Coating, allie une érosion contrôlée de la surface à un relargage de biocides, permettant une protection efficace des coques de bateau contre la salissure marine. Cette thèse a pour objectif de créer de nouveaux FRCs dit « hybrides » car ils combinent différents composants et mécanismes d'action. Pour cela, deux stratégies ont été développées :1)des élastomères silicones renfermant des additifs hydrolysables avec des quantités allant de 5 à 20 %mass.2) des réseaux réticulés PDMS/polyester contenant de 12 à 27 % massique en polyester hydrolysable.La finalité de ces nouveaux revêtements était d'obtenir des surfaces chimiquement et/ou physiquement ambiguës vis-à-vis des organismes marins : (1) soit par la migration d'additifs hydrolysables en surface, par exemple, grâce à l'ajout de poly(méthacrylate de bis(triméthylsilyloxy)méthylsilyl), (2) soit par l'érosion du réseau hybride PDMS/polyester , par exemple, grâce à la réticulation de la poly(E-caprolactone) ou du poly(D,L-lactide-co-glycolide) avec les chaînes PDMS. Les propriétés physico-chimiques telles que la mouillabilité, l'énergie de surface, le module élastique et les propriétés d'hydrolyse/érosion des revêtements ont été étudiées avant et pendant leur immersion en milieu aqueux. L'efficacité antisalissure marine des revêtements a été évaluée lors de leur immersion in situ en mer Méditerranée et lors de tests biologiques ciblant des organismes marins spécifiques.

Ln a context where biocidal antifouling coatings are more and more regulated, it is essential to develop more environmentally friendly systems, such as the Fouling Release Coatings (FRCs), mainly based on silicone elastomers. FRCs can release the marine biofouling thanks to their physico-chemical properties i.e. low surface free energy and low elastic modulus that minimize interactions between the foulant and the surface, and reduce the adhesion strength. Another category of antifouling coatings, named Self-Polishing Coatings, combines a controlled surface erosion as well as the release of biocides, and thus efficiently prevents the ·marine fouling from settling on ship hulls. The objective of this PhD work was to design navel « hybrid » FRCs that combine different components and mechanisms of action. Two strategies were thus developed:1) Silicone elastomers containing hydrolyzable additives from 5 to 20 wt.%2) Crosslinked PDMS/polyester networks with 12 to 27 wt.% of hydrolyzable…

Advisors/Committee Members: Margaillan, André (thesis director), Bressy, Christine (thesis director).

Subjects/Keywords: Antifouling; FRC; SPC; Surfaces ambiguës; Polymères hydrolysables; Réseaux PDMS; Antifouling; FRC; SPC; Ambiguous surfaces; Hydrolyzable polymers; PDMS networks; 541; 577.7

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APA (6^th Edition):

Gevaux, L. (2019). Elastomères à base de polymères hydrolysables : une nouvelle statégie de revêtement antifouling : Hydrolyzable polymer-based elastomers : a new strategy of antifouling coating. (Doctoral Dissertation). Toulon. Retrieved from http://www.theses.fr/2019TOUL0011

Chicago Manual of Style (16^th Edition):

Gevaux, Laure. “Elastomères à base de polymères hydrolysables : une nouvelle statégie de revêtement antifouling : Hydrolyzable polymer-based elastomers : a new strategy of antifouling coating.” 2019. Doctoral Dissertation, Toulon. Accessed April 10, 2021. http://www.theses.fr/2019TOUL0011.

MLA Handbook (7^th Edition):

Gevaux, Laure. “Elastomères à base de polymères hydrolysables : une nouvelle statégie de revêtement antifouling : Hydrolyzable polymer-based elastomers : a new strategy of antifouling coating.” 2019. Web. 10 Apr 2021.

Vancouver:

Gevaux L. Elastomères à base de polymères hydrolysables : une nouvelle statégie de revêtement antifouling : Hydrolyzable polymer-based elastomers : a new strategy of antifouling coating. [Internet] [Doctoral dissertation]. Toulon; 2019. [cited 2021 Apr 10]. Available from: http://www.theses.fr/2019TOUL0011.

Council of Science Editors:

Gevaux L. Elastomères à base de polymères hydrolysables : une nouvelle statégie de revêtement antifouling : Hydrolyzable polymer-based elastomers : a new strategy of antifouling coating. [Doctoral Dissertation]. Toulon; 2019. Available from: http://www.theses.fr/2019TOUL0011

University of New South Wales

23. Browne, Marcella. UV surface modification of polymers for biomaterials applications.

Degree: Graduate School of Biomedical Engineering, 2001, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/58033 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45325/SOURCE02?view=true

Subjects/Keywords: Polymers; Surfaces (Technology); Biomedical materials; Surfaces; Thesis Digitisation Program

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APA (6^th Edition):

Browne, M. (2001). UV surface modification of polymers for biomaterials applications. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/58033 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45325/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Browne, Marcella. “UV surface modification of polymers for biomaterials applications.” 2001. Doctoral Dissertation, University of New South Wales. Accessed April 10, 2021. http://handle.unsw.edu.au/1959.4/58033 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45325/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Browne, Marcella. “UV surface modification of polymers for biomaterials applications.” 2001. Web. 10 Apr 2021.

Vancouver:

Browne M. UV surface modification of polymers for biomaterials applications. [Internet] [Doctoral dissertation]. University of New South Wales; 2001. [cited 2021 Apr 10]. Available from: http://handle.unsw.edu.au/1959.4/58033 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45325/SOURCE02?view=true.

Council of Science Editors:

Browne M. UV surface modification of polymers for biomaterials applications. [Doctoral Dissertation]. University of New South Wales; 2001. Available from: http://handle.unsw.edu.au/1959.4/58033 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45325/SOURCE02?view=true

University of Florida

24. Huo, Yu-Chen. Understanding the Surface Chemical and Mechanical Properties of Hydrogel Materials for Contact Lens Applications.

Degree: PhD, Materials Science and Engineering, 2013, University of Florida

URL: https://ufdc.ufl.edu/UFE0045816

► The surface chemical properties of commercially available silicone lenses were analyzed with respect to monitoring changes following adsorbed block copolymer molecules of ethylene oxide-co-butylene oxide… (more)

▼ The surface chemical properties of commercially available silicone lenses were analyzed with respect to monitoring changes following adsorbed block copolymer molecules of ethylene oxide-co-butylene oxide (EO-BO). X-ray photoelectron spectroscopic (XPS) data confirmed the presence of physisorbed EO-BO on all lens surfaces following solution treatment, and the extent of adsorption greatly differed between the lenses. Friction measurements with atomic force microscope (AFM) employing a colloidal probe in aqueous environment corroborated the adsorption of EO-BO by demonstrating the reduction of the friction coefficient following EO-BO treatment. In a separate study, based on the bulk elution of EO-BO from the lenses and the complementary XPS adsorption data, an EO-BO molecular concentration gradient was evidenced for each lens type. These results suggest that the overall interaction between EO-BO and a lens material depends upon both the surface and bulk composition, and the tribological behavior of the polymer surface can be altered by chemical modifications. The surface elastic moduli of three different silicone hydrogel lenses were examined with colloidal probe AFM. Fitting of the force-indentation plots of the lenses to a Hertzian contact model revealed the disparity in both the magnitude of modulus and the mechanism of deformation as a result of the different surface chemical treatments. Particularly, the “graded” properties arising from the structure of delefilcon A’s surface gel exemplifies the potential of molecular-level design to achieve depth-dependent, tunable surface mechanical properties. Furthermore, to gain a more fundamental perspective, hydrogels of various chemistry and water content were fabricated into films and analyzed using AFM. For a given gel composition, the magnitude of surface modulus varied as much as one order of magnitude for a water content difference of 15%. The dependence of modulus on water content is slightly lower at the surface than in the bulk as predicted by scaling laws. For poly(N-isopropylacrylamide) (PNIPAM), one order of magnitude of increase in surface elastic modulus was observed when solvated chains collapsed following a characteristic phase transition. These findings underscored the importance of the molecular structure and dynamic interaction with surrounding medium in predicting elastic modulus of hydrogel materials at surface. ( en ) Advisors/Committee Members: Perry, Scott S (committee chair), Gower, Laurie B (committee member), Brennan, Anthony B (committee member), Sawyer, Wallace Gregory (committee member), Sarntinoranont, Malisa (committee member).

Subjects/Keywords: Adsorption; Cantilevers; Chemicals; Copolymers; Friction; Hydrogels; Mechanical properties; Moduli of elasticity; Polymers; Silicones; afm – biotribology – eyes – hydrogels – polymers – surfaces – xps

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APA (6^th Edition):

Huo, Y. (2013). Understanding the Surface Chemical and Mechanical Properties of Hydrogel Materials for Contact Lens Applications. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0045816

Chicago Manual of Style (16^th Edition):

Huo, Yu-Chen. “Understanding the Surface Chemical and Mechanical Properties of Hydrogel Materials for Contact Lens Applications.” 2013. Doctoral Dissertation, University of Florida. Accessed April 10, 2021. https://ufdc.ufl.edu/UFE0045816.

MLA Handbook (7^th Edition):

Huo, Yu-Chen. “Understanding the Surface Chemical and Mechanical Properties of Hydrogel Materials for Contact Lens Applications.” 2013. Web. 10 Apr 2021.

Vancouver:

Huo Y. Understanding the Surface Chemical and Mechanical Properties of Hydrogel Materials for Contact Lens Applications. [Internet] [Doctoral dissertation]. University of Florida; 2013. [cited 2021 Apr 10]. Available from: https://ufdc.ufl.edu/UFE0045816.

Council of Science Editors:

Huo Y. Understanding the Surface Chemical and Mechanical Properties of Hydrogel Materials for Contact Lens Applications. [Doctoral Dissertation]. University of Florida; 2013. Available from: https://ufdc.ufl.edu/UFE0045816

Michigan State University

25. Hayrapetyan, Gurgen Ruben. Geometric evolution of single-layer interfaces in the functionalized Cahn-Hilliard equation.

Degree: 2011, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:1533

►

Thesis Ph. D. Michigan State University. Applied Mathematics 2011.

We study the Functionalized Cahn-Hilliard Energy (FCH), which is a higher-order reformulation of the Cahn-Hilliard energy,… (more)

Subjects/Keywords: Boundary value problems; Polymers – Mathematical models; Polymers – Research; Curves on surfaces; Decomposition (Mathematics); Equations; Mathematics; Applied mathematics

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APA (6^th Edition):

Hayrapetyan, G. R. (2011). Geometric evolution of single-layer interfaces in the functionalized Cahn-Hilliard equation. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:1533

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):

Hayrapetyan, Gurgen Ruben. “Geometric evolution of single-layer interfaces in the functionalized Cahn-Hilliard equation.” 2011. Thesis, Michigan State University. Accessed April 10, 2021. http://etd.lib.msu.edu/islandora/object/etd:1533.

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

MLA Handbook (7^th Edition):

Hayrapetyan, Gurgen Ruben. “Geometric evolution of single-layer interfaces in the functionalized Cahn-Hilliard equation.” 2011. Web. 10 Apr 2021.

Vancouver:

Hayrapetyan GR. Geometric evolution of single-layer interfaces in the functionalized Cahn-Hilliard equation. [Internet] [Thesis]. Michigan State University; 2011. [cited 2021 Apr 10]. Available from: http://etd.lib.msu.edu/islandora/object/etd:1533.

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

Council of Science Editors:

Hayrapetyan GR. Geometric evolution of single-layer interfaces in the functionalized Cahn-Hilliard equation. [Thesis]. Michigan State University; 2011. Available from: http://etd.lib.msu.edu/islandora/object/etd:1533

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

Michigan State University

26. Sutton, Joel Kellogg. Analysis of hyperbranched/linear polymer extrudates.

Degree: MS, 2003, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:32073

Subjects/Keywords: Polymers – Extrusion; Polymers – Surfaces; Fluid mechanics; Shear (Mechanics)

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APA (6^th Edition):

Sutton, J. K. (2003). Analysis of hyperbranched/linear polymer extrudates. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:32073

Chicago Manual of Style (16^th Edition):

Sutton, Joel Kellogg. “Analysis of hyperbranched/linear polymer extrudates.” 2003. Masters Thesis, Michigan State University. Accessed April 10, 2021. http://etd.lib.msu.edu/islandora/object/etd:32073.

MLA Handbook (7^th Edition):

Sutton, Joel Kellogg. “Analysis of hyperbranched/linear polymer extrudates.” 2003. Web. 10 Apr 2021.

Vancouver:

Sutton JK. Analysis of hyperbranched/linear polymer extrudates. [Internet] [Masters thesis]. Michigan State University; 2003. [cited 2021 Apr 10]. Available from: http://etd.lib.msu.edu/islandora/object/etd:32073.

Council of Science Editors:

Sutton JK. Analysis of hyperbranched/linear polymer extrudates. [Masters Thesis]. Michigan State University; 2003. Available from: http://etd.lib.msu.edu/islandora/object/etd:32073

University of Akron

27. Hill, Jacob A, Hill. SURFACE LAYER MATRIX-ASSISTED LASER DESORPTION IONIZATION TIME OF FLIGHT MASS SPECTROMETRY (SL-MALDI-TOF MS) ANALYSIS OF POLYMER BLEND SURFACE COMPOSITION.

Degree: PhD, Polymer Science, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1514479406062149

► The composition of a polymer blend is generally different at the surface than in the bulk and the gradient in composition with depth has important… (more)

▼ The composition of a polymer blend is generally different at the surface than in the bulk and the gradient in composition with depth has important implications for surface properties. The determination of the surface composition presents various challenges which continue to prompt the development of new techniques for quantifying the composition. Here the technique of surface layer matrix-assisted laser desorption ionization time-of-flight mass spectrometry (SL-MALDI-ToF-MS) has been further developed to address four specific questions of polymer blend surface behavior within the general category of surface composition determination.The first question is how chain length disparity affects surface segregation in the case that the disparity is quite small. While such segregation is known for blends containing low molecular weight additives or systems with large polydispersity, it has not been reported for anionically polymerized polymers that are viewed, in practice, as monodisperse. For 6 kDa polystyrene the number average molecular weight (Mn) at the surface is ca. 300 Da (5%) lower than that in the bulk and for 7 kDa polymethyl methacrylate the shift is ca. 500 Da.The second question is how chain-end functionalization effects not the location of chain ends at the surface, but rather the prevalence at the surface of any part of a chain having an end functionalization. A key issue of such an approach is understanding precisely where the functionalities ultimately reside and how this functionalization shifts the balance of forces that determine the distribution of chains with depth. The surface of a blend of 6 kDa polystyrene and 6 kDa polystyrene functionalized with hydroxymethyl ends is not only depleted of the higher energy end groups, but is depleted of any segments belonging to the functionalized chains. This is demonstrated using SL-MALDI-ToF-MS, which detects entire chains that have any repeat unit at the outer surface, and requires no labelling. This study was extended to the surfaces of blends of 6 kDa polystyrene and 6 kDa polystyrene functionalized with hydroxyethyl ends. Blends of all compositions less than 90 wt. % functionalized chains showed depletion.Finally, the challenge of determining lateral variations in the surface composition has been addressed with the development of SL-MALDI-ToF-MS imaging (SL-MALDI-ToF-MSI). Key to developing imaging capability was improving the lateral uniformity of the matrix deposition. This uniformity was achieved using solvent free sublimation of matrix and salt onto the sample’s surface. The capabilities of SL-MALDI-ToF-MSI were demonstrated by imaging the absence of material due to masking during material deposition, mechanical scribing or solvent perturbation at the surface of low molecular weight poly(methyl methacrylate) and polystyrene thin films. SL-MALDI-ToF MSI was made possible through the first uniform, solvent free simultaneous sublimation of matrix and salt onto the material’s surface. Advisors/Committee Members: Foster, Mark (Advisor), Dhinojwala, Ali (Committee Chair).

Subjects/Keywords: Analytical Chemistry; Chemistry; Molecular Physics; Molecules; Physical Chemistry; Polymers; polymer, surface segregation, polymer surfaces, MALDI, mass spectrometry, functionalized polymers

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APA (6^th Edition):

Hill, Jacob A, H. (2017). SURFACE LAYER MATRIX-ASSISTED LASER DESORPTION IONIZATION TIME OF FLIGHT MASS SPECTROMETRY (SL-MALDI-TOF MS) ANALYSIS OF POLYMER BLEND SURFACE COMPOSITION. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1514479406062149

Chicago Manual of Style (16^th Edition):

Hill, Jacob A, Hill. “SURFACE LAYER MATRIX-ASSISTED LASER DESORPTION IONIZATION TIME OF FLIGHT MASS SPECTROMETRY (SL-MALDI-TOF MS) ANALYSIS OF POLYMER BLEND SURFACE COMPOSITION.” 2017. Doctoral Dissertation, University of Akron. Accessed April 10, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1514479406062149.

MLA Handbook (7^th Edition):

Hill, Jacob A, Hill. “SURFACE LAYER MATRIX-ASSISTED LASER DESORPTION IONIZATION TIME OF FLIGHT MASS SPECTROMETRY (SL-MALDI-TOF MS) ANALYSIS OF POLYMER BLEND SURFACE COMPOSITION.” 2017. Web. 10 Apr 2021.

Vancouver:

Hill, Jacob A H. SURFACE LAYER MATRIX-ASSISTED LASER DESORPTION IONIZATION TIME OF FLIGHT MASS SPECTROMETRY (SL-MALDI-TOF MS) ANALYSIS OF POLYMER BLEND SURFACE COMPOSITION. [Internet] [Doctoral dissertation]. University of Akron; 2017. [cited 2021 Apr 10]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1514479406062149.

Council of Science Editors:

Hill, Jacob A H. SURFACE LAYER MATRIX-ASSISTED LASER DESORPTION IONIZATION TIME OF FLIGHT MASS SPECTROMETRY (SL-MALDI-TOF MS) ANALYSIS OF POLYMER BLEND SURFACE COMPOSITION. [Doctoral Dissertation]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1514479406062149

University of Hong Kong

28. Wong, Hoi-man. Surface modification of biodegradable metallic material.

Degree: 2008, University of Hong Kong

URL: http://hdl.handle.net/10722/52252

Subjects/Keywords: Polymers - Surfaces.; Magnesium alloys.; Orthopedic implants.

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

APA (6^th Edition):

Wong, H. (2008). Surface modification of biodegradable metallic material. (Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/52252

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):

Wong, Hoi-man. “Surface modification of biodegradable metallic material.” 2008. Thesis, University of Hong Kong. Accessed April 10, 2021. http://hdl.handle.net/10722/52252.

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

MLA Handbook (7^th Edition):

Wong, Hoi-man. “Surface modification of biodegradable metallic material.” 2008. Web. 10 Apr 2021.

Vancouver:

Wong H. Surface modification of biodegradable metallic material. [Internet] [Thesis]. University of Hong Kong; 2008. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/10722/52252.

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

Council of Science Editors:

Wong H. Surface modification of biodegradable metallic material. [Thesis]. University of Hong Kong; 2008. Available from: http://hdl.handle.net/10722/52252

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

Nelson Mandela Metropolitan University

29. Bosch, Tanya. Development of a degreasing and anti-fogging formulation for wet wipe application for automotive glass surfaces.

Degree: MTech, Faculty of Science, 2012, Nelson Mandela Metropolitan University

URL: http://hdl.handle.net/10948/d1013177

► It was the objective of this project to provide a glass cleaner formulation for a wet wipe application with cleaning and anti-fogging properties. This glass… (more)

Subjects/Keywords: Porous materials – Transport properties; Hydrophobic surfaces; Vapor degreasing; Cleaning compounds; Water-soluble polymers

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

APA (6^th Edition):

Bosch, T. (2012). Development of a degreasing and anti-fogging formulation for wet wipe application for automotive glass surfaces. (Masters Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/d1013177

Chicago Manual of Style (16^th Edition):

Bosch, Tanya. “Development of a degreasing and anti-fogging formulation for wet wipe application for automotive glass surfaces.” 2012. Masters Thesis, Nelson Mandela Metropolitan University. Accessed April 10, 2021. http://hdl.handle.net/10948/d1013177.

MLA Handbook (7^th Edition):

Bosch, Tanya. “Development of a degreasing and anti-fogging formulation for wet wipe application for automotive glass surfaces.” 2012. Web. 10 Apr 2021.

Vancouver:

Bosch T. Development of a degreasing and anti-fogging formulation for wet wipe application for automotive glass surfaces. [Internet] [Masters thesis]. Nelson Mandela Metropolitan University; 2012. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/10948/d1013177.

Council of Science Editors:

Bosch T. Development of a degreasing and anti-fogging formulation for wet wipe application for automotive glass surfaces. [Masters Thesis]. Nelson Mandela Metropolitan University; 2012. Available from: http://hdl.handle.net/10948/d1013177

Hong Kong University of Science and Technology

30. Fu, Yi. ToF-SIMS studies on chain mobility at surface of supported polymer films.

Degree: 2013, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-92553 ; https://doi.org/10.14711/thesis-b1254507 ; http://repository.ust.hk/ir/bitstream/1783.1-92553/1/th_redirect.html

► The surface properties of polymer thin films are important in many industrial applications. The free surface, polymer-substrate interactions and environmental conditions can impart dramatic effects… (more)

▼ The surface properties of polymer thin films are important in many industrial applications. The free surface, polymer-substrate interactions and environmental conditions can impart dramatic effects on the properties of thin films. Many researches have studied various polymers and indicated that a surface glass transition temperature (T_g^s) exists at a temperature below or above its bulk glass transition temperature (T_g ). This thesis aims to develop a novel technique to determine this transition temperature using temperature-programmed time-of-flight secondary ion mass spectrometry (ToF-SIMS). Firstly, ToF-SIMS spectra of polystyrene (PS) films supported on silicon wafers were obtained at various temperatures. Principal component analysis (PCA) of the ToF-SIMS data revealed a transition temperature (T_T) at which the surface structure of PS was rearranged. The T_Ts of 120 nm thick PSs with different molecular weights were approximately 30 °C lower than their bulk T_g s . As the T_T is dependent on the molecular weight and strongly related to the T_g , it is believed that the T_T determined by ToF-SIMS is related to the T_gs . Furthermore, the detailed PCA analysis indicated that the phenyl groups of PS tended to move away from the surface at temperatures above T_T , and the results were confirmed by contact angle measurements and X-ray photoelectron spectroscopy (XPS). Secondly, the mobility of polymer segments at the free surface was further analyzed using poly (2, 3, 4, 5, 6-pentafluorostyrene) (5FPS) at various temperatures. A detailed analysis of ToF-SIMS spectra indicated that the fragmentation processes for PS and 5FPS are very similar, but the pendant groups of 5FPS and PS moved in exactly opposite directions as the temperature increased. The concentration of the end-group ions increased significantly at temperatures above T_T . This information can also be used to determine T_g^s . In summary, this study demonstrated the capability of ToF-SIMS combined with PCA in determining the surface glass transition temperatures

Subjects/Keywords: Time-of-flight mass spectrometry ; Glass transition temperature ; Polymers ; Thermal properties ; Surfaces

Record Details Similar Records Cite « Share

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

APA (6^th Edition):

Fu, Y. (2013). ToF-SIMS studies on chain mobility at surface of supported polymer films. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-92553 ; https://doi.org/10.14711/thesis-b1254507 ; http://repository.ust.hk/ir/bitstream/1783.1-92553/1/th_redirect.html

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):

Fu, Yi. “ToF-SIMS studies on chain mobility at surface of supported polymer films.” 2013. Thesis, Hong Kong University of Science and Technology. Accessed April 10, 2021. http://repository.ust.hk/ir/Record/1783.1-92553 ; https://doi.org/10.14711/thesis-b1254507 ; http://repository.ust.hk/ir/bitstream/1783.1-92553/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Fu, Yi. “ToF-SIMS studies on chain mobility at surface of supported polymer films.” 2013. Web. 10 Apr 2021.

Vancouver:

Fu Y. ToF-SIMS studies on chain mobility at surface of supported polymer films. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2013. [cited 2021 Apr 10]. Available from: http://repository.ust.hk/ir/Record/1783.1-92553 ; https://doi.org/10.14711/thesis-b1254507 ; http://repository.ust.hk/ir/bitstream/1783.1-92553/1/th_redirect.html.

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

Council of Science Editors:

Fu Y. ToF-SIMS studies on chain mobility at surface of supported polymer films. [Thesis]. Hong Kong University of Science and Technology; 2013. Available from: http://repository.ust.hk/ir/Record/1783.1-92553 ; https://doi.org/10.14711/thesis-b1254507 ; http://repository.ust.hk/ir/bitstream/1783.1-92553/1/th_redirect.html

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

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Open Access Theses and Dissertations