You searched for subject:( Emulsions)
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1.
Nedjar, Soumia.
Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème.
Degree: 2011, Université M'Hamed Bougara Boumerdès
URL: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1066
► 78 p. : ill. ; 30 cm
La formation des émulsions est une application cruciale qui intéresse de nombreux domaines industriels. Notamment, l'émulsification d'une fraction…
(more)
▼ 78 p. : ill. ; 30 cm
La formation des émulsions est une application cruciale qui intéresse de nombreux domaines industriels. Notamment, l'émulsification d'une fraction d'eau dans les biocarburants, afin d'améliorer la combustion et de diminuer l'émission des gaz nocifs. Ce travail rapporte un microsystème capable de former des émulsions de type eau dans l'huile dont la taille moyenne des gouttes est de l'ordre de 1µm à 10µm. Ce microsystème comporte deux microcanaux croisés avec un angle droit capable de traiter des débits totaux de 10ml/min à 40ml/min, et un rapport de débit de phase continue sur le débit de la phase dispersée variant de 5 à 30. Une étude sur l'influence de configuration d'écoulement des deux phases continue et dispersée et de concentration du surfactif sur la taille des gouttes a été réalisée. La configuration où les deux phases s'écoulent sur le même axe mais en sens inverses (configuration B) produit des émulsions ayant une taille moyenne de gouttes plus petite que celles formées avec l'autre configuration où la phase continue s'écoule perpendiculairement à la phase dispersée (configuration A). Par contre une augmentation de concentration de surfactif de 5% à 10% n'a aucune influence sur le diamètre moyen des gouttes. Les dimensions et la forme de la section des microcanaux ont une importance sur la faisabilité de générer des gouttes d'eau. Des microcanaux de section rectangulaire et de dimension 500*2500µm ont montré une difficulté pour produire des émulsions de l'eau dans l'huile
Subjects/Keywords: Microtechniques; Emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
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to Zotero / EndNote / Reference
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APA (6th Edition):
Nedjar, S. (2011). Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1066
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nedjar, Soumia. “Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème.” 2011. Thesis, Université M'Hamed Bougara Boumerdès. Accessed February 18, 2019.
http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1066.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nedjar, Soumia. “Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème.” 2011. Web. 18 Feb 2019.
Vancouver:
Nedjar S. Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2011. [cited 2019 Feb 18].
Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1066.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nedjar S. Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème. [Thesis]. Université M'Hamed Bougara Boumerdès; 2011. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1066
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University
2.
Mehrotra, Rajat.
Monodispersed polygonal water droplets in microchannel.
Degree: 2009, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2726
► The fabrication, motion and behavior of small droplets are subjects under considerable current study. The possible applications include using droplets as actuators to enhance mixing,…
(more)
▼ The fabrication, motion and behavior of small droplets are subjects under
considerable current study. The possible applications include using droplets as actuators
to enhance mixing, as chemical reactors and the formation of
emulsions. Microfluidics
provides a convenient means of producing droplets at the micro scale. The study is
currently dominated by spherical systems where droplets are consistently spherical in
nature. Various methods and geometries have been tested for fabricating these droplets
but little research has been conducted towards producing non-circular droplets. While
the fabrication of non-spherical droplets has been reported before control over their
shape remains difficult to achieve.
In this thesis, we present a method to fabricate droplets using shear focusing in
an oil medium alternatively from two channels facing each other. The droplets produced
are non-circular in shape, and their shape dynamically alters as they travel in the
microfluidic channel. The size of the droplets can be controlled by the ratio of oil and
water flow rates.
Microscopic images have been presented that show the non-spherical shape of
the droplets at the point of fabrication. Images taken at two points further along the microfluidic channel show how the shapes of these droplets change as they travel in the
channel. There were three regimes of droplet shapes, circular, triangular and rectangular
shapes that were determined by the packing ratio of water droplet in oil phase in
microfluidic channels. All droplets formed in this experiment were monodispersed.
Advisors/Committee Members: Kameoka, Jun (advisor), Chang, Kuang-An (committee member), Kundur, Deepa (committee member), Su, Chin (committee member).
Subjects/Keywords: microfluidics; emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mehrotra, R. (2009). Monodispersed polygonal water droplets in microchannel. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2726
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mehrotra, Rajat. “Monodispersed polygonal water droplets in microchannel.” 2009. Thesis, Texas A&M University. Accessed February 18, 2019.
http://hdl.handle.net/1969.1/ETD-TAMU-2726.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mehrotra, Rajat. “Monodispersed polygonal water droplets in microchannel.” 2009. Web. 18 Feb 2019.
Vancouver:
Mehrotra R. Monodispersed polygonal water droplets in microchannel. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2726.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mehrotra R. Monodispersed polygonal water droplets in microchannel. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2726
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
3.
Nedjar, Soumia.
Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème.
Degree: 2011, Université M'Hamed Bougara Boumerdès
URL: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/489
► 78 p. ; ill. ; 30 cm
La formation des émulsions est une application cruciale qui intéresse de nombreux domaines industriels. Notamment, l'émulsification d'une fraction…
(more)
▼ 78 p. ; ill. ; 30 cm
La formation des émulsions est une application cruciale qui intéresse de nombreux domaines industriels. Notamment, l'émulsification d'une fraction d'eau dans les biocarburants, afin d'améliorer la combustion et de diminuer l'émission des gaz nocifs. Ce travail rapporte un microsystème capable de former des émulsions de type eau dans l'huile dont la taille moyenne des gouttes est de l'ordre de 1µm à 10µm. Ce microsystème comporte deux microcanaux croisés avec un angle droit capable de traiter des débits totaux de 10ml/min à 40ml/min, et un rapport de débit de phase continue sur le débit de la phase dispersée variant de 5 à 30. Une étude sur l'influence de configuration d'écoulement des deux phases continue et dispersée et de concentration du surfactif sur la taille des gouttes a été réalisée. La configuration où les deux phases s'écoulent sur le même axe mais en sens inverses (configuration B) produit des émulsions ayant une taille moyenne de gouttes plus petite que celles formées avec l'autre configuration où la phase continue s'écoule perpendiculairement à la phase dispersée (configuration A). Par contre une augmentation de concentration de surfactif de 5% à 10% n'a aucune influence sur le diamètre moyen des gouttes. Les dimensions et la forme de la section des microcanaux ont une importance sur la faisabilité de générer des gouttes d'eau. Des microcanaux de section rectangulaire et de dimension 500*2500µm ont montré une difficulté pour produire des émulsions de l'eau dans l'huile
Subjects/Keywords: Microtechniques; Emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nedjar, S. (2011). Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/489
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nedjar, Soumia. “Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème.” 2011. Thesis, Université M'Hamed Bougara Boumerdès. Accessed February 18, 2019.
http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/489.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nedjar, Soumia. “Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème.” 2011. Web. 18 Feb 2019.
Vancouver:
Nedjar S. Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2011. [cited 2019 Feb 18].
Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/489.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nedjar S. Mise au point d'un dispositif d'alimentation et synthèse d'émulsion dans un microsystème. [Thesis]. Université M'Hamed Bougara Boumerdès; 2011. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/489
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cape Peninsula University of Technology
4.
Foudazi, Reza.
Models for structure-rheology of highly concentrated emulsions
.
Degree: 2009, Cape Peninsula University of Technology
URL: http://etd.cput.ac.za/handle/20.500.11838/2152
► Highly concentrated emulsions (HCE) are classified as high internal phase ratio emulsions (or simply HIPRE), and the dispersed phase droplets are ranged In a hexagonal…
(more)
▼ Highly concentrated emulsions (HCE) are classified as high internal phase ratio
emulsions (or simply HIPRE), and the dispersed phase droplets are ranged In a
hexagonal closely packed configuration. This closely packed configuration and the
profound hydrodynamic interaction between neighbouring droplets induce mechanical
interference between the droplets, thus prohibiting their free movement. Hence, while
the highly concentrated emulsions consist of very low viscosity and inelastic
components, they show gel-like behaviour with high elasticity and non-Newtonian flow
response. It has been suggested in the literature that this behaviour originated from
interfacial energy in terms of Laplace pressure. Therefore, the scaling of rheological
properties with Laplace pressure is expected, but several publications show a deviation
from this scaling behaviour. It seems that the source of deviation from this scaling is
interdroplet interaction, which can contribute to the rheological behaviour of highly
concentrated emulsions. The shear modulus of highly concentrated emulsions in the
presence of interdroplet interaction was developed in this work. The prediction of model
was verified by the data presented in the literature. It was shown that a small source of
interdroplet interaction can result in deviation from scaling of shear modulus with
Laplace pressure.
Subjects/Keywords: Emulsions;
Rheology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Foudazi, R. (2009). Models for structure-rheology of highly concentrated emulsions
. (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/2152
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Foudazi, Reza. “Models for structure-rheology of highly concentrated emulsions
.” 2009. Thesis, Cape Peninsula University of Technology. Accessed February 18, 2019.
http://etd.cput.ac.za/handle/20.500.11838/2152.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Foudazi, Reza. “Models for structure-rheology of highly concentrated emulsions
.” 2009. Web. 18 Feb 2019.
Vancouver:
Foudazi R. Models for structure-rheology of highly concentrated emulsions
. [Internet] [Thesis]. Cape Peninsula University of Technology; 2009. [cited 2019 Feb 18].
Available from: http://etd.cput.ac.za/handle/20.500.11838/2152.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Foudazi R. Models for structure-rheology of highly concentrated emulsions
. [Thesis]. Cape Peninsula University of Technology; 2009. Available from: http://etd.cput.ac.za/handle/20.500.11838/2152
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University
5.
Jooste, Martha Elizabeth.
Cake structure and palatability as affected by emulsifying agents and baking temperatures.
Degree: PhD, Foods and Nutrition, 1951, Oregon State University
URL: http://hdl.handle.net/1957/26200
Subjects/Keywords: Emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jooste, M. E. (1951). Cake structure and palatability as affected by emulsifying agents and baking temperatures. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/26200
Chicago Manual of Style (16th Edition):
Jooste, Martha Elizabeth. “Cake structure and palatability as affected by emulsifying agents and baking temperatures.” 1951. Doctoral Dissertation, Oregon State University. Accessed February 18, 2019.
http://hdl.handle.net/1957/26200.
MLA Handbook (7th Edition):
Jooste, Martha Elizabeth. “Cake structure and palatability as affected by emulsifying agents and baking temperatures.” 1951. Web. 18 Feb 2019.
Vancouver:
Jooste ME. Cake structure and palatability as affected by emulsifying agents and baking temperatures. [Internet] [Doctoral dissertation]. Oregon State University; 1951. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/1957/26200.
Council of Science Editors:
Jooste ME. Cake structure and palatability as affected by emulsifying agents and baking temperatures. [Doctoral Dissertation]. Oregon State University; 1951. Available from: http://hdl.handle.net/1957/26200

Massey University
6.
Fuller, George Thomas.
Studies on the shear stability of partially crystalline oil-in-water emulsions.
Degree: PhD, Food Technology, 2015, Massey University
URL: http://hdl.handle.net/10179/8304
► Partial coalescence or fusion of fat globules is a common form of destabilisation in food-related partially crystalline oil-in-water emulsions that generally causes thickening of the…
(more)
▼ Partial coalescence or fusion of fat globules is a common form of destabilisation in
food-related partially crystalline oil-in-water emulsions that generally causes thickening
of the emulsion, reduced functionality and phase separation. Partial coalescence is
particularly exacerbated by shear, temperature fluctuations and air incorporation. Each
of which the food product may be exposed to during manufacture, storage, transport or
end use leading most often to deleterious effects. One notable example of partial
coalescence being desirable is during the manufacture of ice cream.
In order to better understand the factors affecting partial coalescence and their
interactions, a systematic series of studies was undertaken on the shear stability of a
model food-related partially crystalline oil-in-water emulsion. Shear-induced
aggregation of 35 wt% partially crystalline oil-in-water emulsions was studied under
conditions causing jamming of partially coalesced fat globule aggregates formed under
steady shear. Emulsions with different interfacial compositions and solid fat content
(~25–90%) were studied to probe their effect on the generation of a jamming transition
over a range of shear rates (500–2000 s-1). By displacing adsorbed sodium caseinate
from the oil-water interface using Tween 20, partial coalescence sensitive emulsions
were prepared with either mixed sodium caseinate-Tween 20 or Tween 20 dominated
interfacial film compositions using 0.5 or 1.5 wt% Tween 20 respectively. Quiescently,
the emulsions were stable with 0.5 wt% Tween 20 regardless of solid fat content. At 1.5
wt% or above, stability decreased with increasing solid fat content and Tween
concentration. Under shear, partial displacement of adsorbed sodium caseinate by
Tween 20 generally resulted in the formation of relatively stable aggregates whereas
high displacement of protein led to the formation of less stable aggregates under shear.
The aggregation time of emulsions with Tween 20 dominated interfaces decreased with
increasing solid fat content whereas for mixed sodium caseinate-Tween 20 emulsions it
increased with increasing solid fat content. The extent of fat globule aggregation at low
solid fat content was relatively low irrespective of Tween concentration, whereas at
high solid fat content, the extent of aggregation varied considerably when interfacial
composition was altered. Cryo-TEM micrographs of the fat globules revealed a
relatively smooth surface regardless of composition indicating that fat crystal protrusion
was not a major factor affecting the stability. These findings showed that interfacial
protein functions both to regulate the formation of partially crystalline aggregates as
well as the aggregate stability under shear. Furthermore, high solid fat content
emulsions although low in liquid oil content were shown to be highly susceptible to
partial coalescence when the adsorbed protein load was low.
The effect of polyoxyethylene sorbitan fatty acid esters (Tween) alone or in
combination with sorbitan…
Subjects/Keywords: Emulsions;
Food
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fuller, G. T. (2015). Studies on the shear stability of partially crystalline oil-in-water emulsions. (Doctoral Dissertation). Massey University. Retrieved from http://hdl.handle.net/10179/8304
Chicago Manual of Style (16th Edition):
Fuller, George Thomas. “Studies on the shear stability of partially crystalline oil-in-water emulsions.” 2015. Doctoral Dissertation, Massey University. Accessed February 18, 2019.
http://hdl.handle.net/10179/8304.
MLA Handbook (7th Edition):
Fuller, George Thomas. “Studies on the shear stability of partially crystalline oil-in-water emulsions.” 2015. Web. 18 Feb 2019.
Vancouver:
Fuller GT. Studies on the shear stability of partially crystalline oil-in-water emulsions. [Internet] [Doctoral dissertation]. Massey University; 2015. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/10179/8304.
Council of Science Editors:
Fuller GT. Studies on the shear stability of partially crystalline oil-in-water emulsions. [Doctoral Dissertation]. Massey University; 2015. Available from: http://hdl.handle.net/10179/8304

Oregon State University
7.
Beecroft, Robert Isaiah.
Some phenomena in photographic emulsions in strong electric fields.
Degree: MS, Physics, 1957, Oregon State University
URL: http://hdl.handle.net/1957/50357
Subjects/Keywords: Emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Beecroft, R. I. (1957). Some phenomena in photographic emulsions in strong electric fields. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/50357
Chicago Manual of Style (16th Edition):
Beecroft, Robert Isaiah. “Some phenomena in photographic emulsions in strong electric fields.” 1957. Masters Thesis, Oregon State University. Accessed February 18, 2019.
http://hdl.handle.net/1957/50357.
MLA Handbook (7th Edition):
Beecroft, Robert Isaiah. “Some phenomena in photographic emulsions in strong electric fields.” 1957. Web. 18 Feb 2019.
Vancouver:
Beecroft RI. Some phenomena in photographic emulsions in strong electric fields. [Internet] [Masters thesis]. Oregon State University; 1957. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/1957/50357.
Council of Science Editors:
Beecroft RI. Some phenomena in photographic emulsions in strong electric fields. [Masters Thesis]. Oregon State University; 1957. Available from: http://hdl.handle.net/1957/50357

Oregon State University
8.
Wang, Ruey-Hsi.
Thermal conductivity of emulsions made up of two immiscible liquids.
Degree: MS, Chemical Engineering, 1957, Oregon State University
URL: http://hdl.handle.net/1957/51120
Subjects/Keywords: Emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wang, R. (1957). Thermal conductivity of emulsions made up of two immiscible liquids. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/51120
Chicago Manual of Style (16th Edition):
Wang, Ruey-Hsi. “Thermal conductivity of emulsions made up of two immiscible liquids.” 1957. Masters Thesis, Oregon State University. Accessed February 18, 2019.
http://hdl.handle.net/1957/51120.
MLA Handbook (7th Edition):
Wang, Ruey-Hsi. “Thermal conductivity of emulsions made up of two immiscible liquids.” 1957. Web. 18 Feb 2019.
Vancouver:
Wang R. Thermal conductivity of emulsions made up of two immiscible liquids. [Internet] [Masters thesis]. Oregon State University; 1957. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/1957/51120.
Council of Science Editors:
Wang R. Thermal conductivity of emulsions made up of two immiscible liquids. [Masters Thesis]. Oregon State University; 1957. Available from: http://hdl.handle.net/1957/51120

University of British Columbia
9.
Kazmi, Syed Jamshed Ali.
Preservative distribution in emulsions
.
Degree: 1971, University of British Columbia
URL: http://hdl.handle.net/2429/34150
► Until recently, evaluation of the effectiveness of preservatives in emulsified systems has depended largely on time-consuming microbiological techniques. Mathematical models have now been developed which…
(more)
▼ Until recently, evaluation of the effectiveness of preservatives in emulsified systems has depended largely on time-consuming microbiological techniques. Mathematical models have now been developed which enable the amount of preservative necessary for adequate preservation to be calculated. Determination of the physico-chemical parameters for these models is again a time-consuming process, especially where complex emulsions are involved. In the present work a three-chambered dialysis method has been investigated. Using this method it is possible to determine the concentration of preservative in the various phases of an emulsion and thus the total concentration required for adequate preservation.
Various factors affecting the distribution of preservatives between oil and water and the interaction between preservatives and surfactant are discussed. These factors are then related to the problem of the distribution of a preservative in an oil in water emulsion system. Methodology used to evaluate the various physico-chemical parameters is reviewed and equations for representing the results are discussed.
The distribution of benzoic acid between peanut oil and water and mineral oil and water systems was studied over a wide concentration range. The interaction of benzoic acid with aqueous solutions of the nonionic surfactant cetomacrogol was studied using solubility and equilibrium dialysis techniques. The interaction of various other preservatives with aqueous solutions of the nonionic surfactant cetomacrogol was examined. A comparison was made of various methods of expressing this interaction. It is suggested that the Scatchard equation is the most satisfactory equation for describing the binding data. Binding parameters determined from a Scatchard plot in the concentration range of free preservative appropriate for antimicrobial activity were used to calculate the total concentration of preservative required in the surfactant solution.
A three-chambered dialysis cell was used to estimate the distribution of benzoic acid between the oil phase and the aqueous phase of oil in water emulsions containing peanut oil or mineral oil. The method also differentiates between preservative bound, or solubilized, by the surfactant and free in the aqueous phase. The distribution data was plotted on a three-dimensional graph from which the total concentration of preservative needed to provide a given free concentration in the aqueous phase can be determined. Results from the dialysis method agree closely with those calculated using mathematical models for preservative distribution. Hence the three-chambered dialysis method provides a relatively simple direct method of determining the required preservative concentration without recourse to mathematical models.
Subjects/Keywords: Emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kazmi, S. J. A. (1971). Preservative distribution in emulsions
. (Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/34150
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kazmi, Syed Jamshed Ali. “Preservative distribution in emulsions
.” 1971. Thesis, University of British Columbia. Accessed February 18, 2019.
http://hdl.handle.net/2429/34150.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kazmi, Syed Jamshed Ali. “Preservative distribution in emulsions
.” 1971. Web. 18 Feb 2019.
Vancouver:
Kazmi SJA. Preservative distribution in emulsions
. [Internet] [Thesis]. University of British Columbia; 1971. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/2429/34150.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kazmi SJA. Preservative distribution in emulsions
. [Thesis]. University of British Columbia; 1971. Available from: http://hdl.handle.net/2429/34150
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Guelph
10.
Massel, Valerie.
Factors Influencing the Stability and Encapsulation
Efficiency of Water-in-Oil and Water-in-Oil-in-Water Emulsions
Stabilized by PGPR and Sodium Caseinate.
Degree: MS, Food Science, 2012, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3064
► Water-in-oil (W/O) emulsions were investigated using light scattering and rheology to determine the effect of polyglycerol polyricinoleate (PGPR) concentration and inner aqueous phase composition on…
(more)
▼ Water-in-oil (W/O)
emulsions were investigated using
light scattering and rheology to determine the effect of
polyglycerol polyricinoleate (PGPR) concentration and inner aqueous
phase composition on stability. Using high-pressure homogenization
and 2% PGPR it was possible to obtain small and stable W/O emulsion
droplets with 30% water. The
emulsions were then incorporated in a
water-in-oil-in-water (W/O/W) emulsion, and droplets were still
present in the inner phase after one month of storage, as clearly
shown by confocal microscopy. Encapsulation efficiencies were
tested using a water-soluble dye, brilliant blue and a divalent
cation, magnesium chloride. The encapsulation efficiency and
stability of the encapsulated material depended on the nature of
the material being encapsulated.
Advisors/Committee Members: Corredig, Milena.
Subjects/Keywords: Multiple Emulsions; PGPR; W/O Emulsions; DWS
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Massel, V. (2012). Factors Influencing the Stability and Encapsulation
Efficiency of Water-in-Oil and Water-in-Oil-in-Water Emulsions
Stabilized by PGPR and Sodium Caseinate. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3064
Chicago Manual of Style (16th Edition):
Massel, Valerie. “Factors Influencing the Stability and Encapsulation
Efficiency of Water-in-Oil and Water-in-Oil-in-Water Emulsions
Stabilized by PGPR and Sodium Caseinate.” 2012. Masters Thesis, University of Guelph. Accessed February 18, 2019.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3064.
MLA Handbook (7th Edition):
Massel, Valerie. “Factors Influencing the Stability and Encapsulation
Efficiency of Water-in-Oil and Water-in-Oil-in-Water Emulsions
Stabilized by PGPR and Sodium Caseinate.” 2012. Web. 18 Feb 2019.
Vancouver:
Massel V. Factors Influencing the Stability and Encapsulation
Efficiency of Water-in-Oil and Water-in-Oil-in-Water Emulsions
Stabilized by PGPR and Sodium Caseinate. [Internet] [Masters thesis]. University of Guelph; 2012. [cited 2019 Feb 18].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3064.
Council of Science Editors:
Massel V. Factors Influencing the Stability and Encapsulation
Efficiency of Water-in-Oil and Water-in-Oil-in-Water Emulsions
Stabilized by PGPR and Sodium Caseinate. [Masters Thesis]. University of Guelph; 2012. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3064

Ryerson University
11.
Haj-Shafiei, Samira.
Rheological properties and flow behaviour of wax-stabilized water-in-oil emulsions.
Degree: 2011, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A1751
► The objective of this study was to characterize the flow and rheological behaviour of model wax-stabilized water-in-oil (W/O) emulsions consisting of light mineral oil, paraffin…
(more)
▼ The objective of this study was to characterize the flow and rheological behaviour of model wax-stabilized water-in-oil (W/O)
emulsions consisting of light mineral oil, paraffin wax and glycerol monooleate as the oil phase and water as the dispersed aqueous phase. An[sic] laboratory-scale benchtop flowloop system was used to explore the flow behaviour of the
emulsions' oil phase (oil, paraffin wax and surfactant). The key contribution from this work was that the higher initial temperature gradient (40°C compared to 19°C) experienced by the rapidly-cooled oil led to more initial deposition on the flowloop inner wall. The rheological properties of W/O
emulsions with different water cuts (10-50wt%) were also studied. Rotational, oscillatory rheology and creep compliance and recovery were characterized on
emulsions aged up to 28 days. Overall, the results demonstrated that emulsion composition, and age could significantly influence an emulsion's flow behaviour and rheological properties.
Advisors/Committee Members: Rousseau, Dérick (Thesis advisor), Ryerson University (Degree grantor).
Subjects/Keywords: Emulsions – Mathematical models; Emulsions; Rheology; Viscosity; Stability
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Haj-Shafiei, S. (2011). Rheological properties and flow behaviour of wax-stabilized water-in-oil emulsions. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A1751
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Haj-Shafiei, Samira. “Rheological properties and flow behaviour of wax-stabilized water-in-oil emulsions.” 2011. Thesis, Ryerson University. Accessed February 18, 2019.
https://digital.library.ryerson.ca/islandora/object/RULA%3A1751.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Haj-Shafiei, Samira. “Rheological properties and flow behaviour of wax-stabilized water-in-oil emulsions.” 2011. Web. 18 Feb 2019.
Vancouver:
Haj-Shafiei S. Rheological properties and flow behaviour of wax-stabilized water-in-oil emulsions. [Internet] [Thesis]. Ryerson University; 2011. [cited 2019 Feb 18].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1751.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Haj-Shafiei S. Rheological properties and flow behaviour of wax-stabilized water-in-oil emulsions. [Thesis]. Ryerson University; 2011. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1751
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology
12.
Fitzpatrick, Paul.
Correlation of silver halide emulsion bar-coater vacuum chamber pressure fluctuations with flow pattern occurrence.
Degree: Imaging Science (BS), School of Photographic Arts and Sciences (CIAS), 1982, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/928
► A study was conducted in which the cause of flow pattern, a repetitive mottle-like defect, was investigated. Results obtained indicate that vacuum pressure fluctuations…
(more)
▼ A study was conducted in which the cause of flow pattern, a repetitive mottle-like defect, was investigated. Results obtained indicate that vacuum pressure fluctuations occur at the start of coating by the vacuum flow port that are 367% greater than at the center of coating. These fluctuations decay in time during the period of flow pattern occurrence, and range in frequency from 0 to .10 mm-1. These pressure fluctuations correlate to flow pattern density fluctuation frequencies of the same range. Additionally, it was seen that the decay rate of the ME side of the vacuum chamber was three times the rate of the UME side. No significant pressure fluctuation phenomena was observed by the end seals of the vacuum chamber.
Advisors/Committee Members: Serafino Cardinali.
Subjects/Keywords: Photographic emulsions; Emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fitzpatrick, P. (1982). Correlation of silver halide emulsion bar-coater vacuum chamber pressure fluctuations with flow pattern occurrence. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/928
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fitzpatrick, Paul. “Correlation of silver halide emulsion bar-coater vacuum chamber pressure fluctuations with flow pattern occurrence.” 1982. Thesis, Rochester Institute of Technology. Accessed February 18, 2019.
https://scholarworks.rit.edu/theses/928.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fitzpatrick, Paul. “Correlation of silver halide emulsion bar-coater vacuum chamber pressure fluctuations with flow pattern occurrence.” 1982. Web. 18 Feb 2019.
Vancouver:
Fitzpatrick P. Correlation of silver halide emulsion bar-coater vacuum chamber pressure fluctuations with flow pattern occurrence. [Internet] [Thesis]. Rochester Institute of Technology; 1982. [cited 2019 Feb 18].
Available from: https://scholarworks.rit.edu/theses/928.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fitzpatrick P. Correlation of silver halide emulsion bar-coater vacuum chamber pressure fluctuations with flow pattern occurrence. [Thesis]. Rochester Institute of Technology; 1982. Available from: https://scholarworks.rit.edu/theses/928
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
13.
Metidji, Karima.
Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut.
Degree: 2011, Université M'Hamed Bougara Boumerdès
URL: http://dlibrary.univ-boumerdes.dz:8080123456789/1401
► 84 p. : ill. ; 30 cm
Les émulsions pétrolières sont des systèmes complexes très souvent rencontrés à tous les niveaux de l'industrie pétrolière :…
(more)
▼ 84 p. : ill. ; 30 cm
Les émulsions pétrolières sont des systèmes complexes très souvent rencontrés à tous les niveaux de l'industrie pétrolière : production du pétrole brut, transport, traitement en raffinerie et d'autres. Elles augmentent le volume et la viscosité de brut, qui s'ajoutent de manière significative aux frais d'exploitation. Il est bien connu que la stabilité de ces émulsions dépend principalement de la présence d'un film rigide sur l'interface eau/huile. Ce film se compose des émulsifiants qui ne sont certes que des asphaltènes et des résines, constituants naturels de pétrole brut. L'objectif de ce travail est d'identifier les paramètres du processus d'agrégation d'asphaltènes et par la suite étudier l'influence de ces derniers sur la stabilité des bruts de HassiMessaoud et d'Adrar. Une caractérisation physico-chimique de pétrole brut de Hassi Messaoud et d'Adrar a été effectuée en particulier la composition chimique à l'aide de la chromatographie en phase gazeuse et la composition SARA à l'aide de la chromatographie TLC/FID. Les principaux groupes fonctionnels composant les asphaltènes d'Adrar ont été identifiés grâce à la spectrométrie infrarouge. Les résultats d'études de stabilité d'agrégation ont montré que les asphaltènes en milieu aliphatique forment les plus grands agrégats. Il a été constaté que la présence des solvants aromatiques ou un excès de résines de pétrole réduit le degré d'agrégation. Au cours de ce travail, des échantillons d'émulsion ont été préparés à partir de pétrole de Hassi Messaoud, d'Adrar et les maltènes d'Adrar afin d'étudier l'effet des propriétés physico-chimiques et la composition chimique de la phase huileuse sur la stabilité des émulsions eau-brut. Les résultats indiquant que les huiles les plus lourdes et les plus riches en asphaltènes forment les émulsions les plus stables. Aussi nous nous sommes proposés d'étudier l'effet de la température, du pH d'eau, de la teneur en asphaltènes et de l'aromaticité du brut. Ces essais ont montré que la concentration des asphaltènes, le rapport résines/asphaltènes et la solubilité des asphaltènes sont les facteurs primaires régissant la stabilité des émulsions eau-pétrole brut
Subjects/Keywords: Asphaltènes; Emulsions; Pétroliers
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Metidji, K. (2011). Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080123456789/1401
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Metidji, Karima. “Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut.” 2011. Thesis, Université M'Hamed Bougara Boumerdès. Accessed February 18, 2019.
http://dlibrary.univ-boumerdes.dz:8080123456789/1401.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Metidji, Karima. “Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut.” 2011. Web. 18 Feb 2019.
Vancouver:
Metidji K. Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2011. [cited 2019 Feb 18].
Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1401.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Metidji K. Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut. [Thesis]. Université M'Hamed Bougara Boumerdès; 2011. Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1401
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo
14.
Bains, Upinder.
In-Situ Continuous Monitoring of Catastrophic Phase Inversion and Viscosity of Pickering Emulsions.
Degree: 2018, University of Waterloo
URL: http://hdl.handle.net/10012/13335
► Emulsions are used in the various field such as petroleum, pharmaceuticals, foods, cosmetics, paints, etc. Emulsions stabilized with solid nanoparticles are called Pickering emulsions. More…
(more)
▼ Emulsions are used in the various field such as petroleum, pharmaceuticals, foods, cosmetics, paints, etc. Emulsions stabilized with solid nanoparticles are called Pickering emulsions. More recently, a growing awareness of using environment friendly products has led to more and more researchers to develop and modify natural materials. Starch nanoparticle might be a suitable candidate because they are environmentally friendly, safe and non-toxic. Also, from a practical point of view, starch nanoparticles are low cost, and rheological properties of their emulsions can easily be altered with the help of additives. Because of the unstable nature of these emulsions, continuous agitation is needed to keep the emulsion from separating. This makes the viscosity measurements a challenge, however this task was made possible at low shear rates under some controlled parameters.
In this study, an in-situ viscosity measurement method is used to investigate the viscous behaviour of O/W and W/O emulsions at a different volume fraction of the dispersed phase. For this purpose, rotational viscometer installed in a tank was used along with a high shear mixer. In this work, two sets of emulsions were formulated with starch nanoparticles to study their rheological behaviour. Also, Surfactant-stabilized O/W type emulsions were formulated with commercially known Triton X-100 non-ionic surfactant and compared with solid nanoparticles emulsions for rheology and stability. The emulsions viscosities and shear rate were measured at different concentrations of the dispersed phase and spindle rotation speeds.
Experimental results showed that, at low concentration of dispersed phase, emulsions exhibited Newtonian behaviour and at high concentrations of the dispersed phase, emulsions displayed non-Newtonian shear-thinning behaviour in that viscosity was dependent on the shear rate. This nature of the emulsions was confirmed as the viscosity measurements changed with spindle rotation speeds. Starch nanoparticles increased the viscosity of the emulsions and played a critical role in stabilizing emulsions by adsorbing at the oil-water interface. For water-in-oil emulsions, Pickering emulsions displayed phase inversion which was related to particle concentration.
Subjects/Keywords: Emulsions; Viscosity; Rheology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bains, U. (2018). In-Situ Continuous Monitoring of Catastrophic Phase Inversion and Viscosity of Pickering Emulsions. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/13335
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bains, Upinder. “In-Situ Continuous Monitoring of Catastrophic Phase Inversion and Viscosity of Pickering Emulsions.” 2018. Thesis, University of Waterloo. Accessed February 18, 2019.
http://hdl.handle.net/10012/13335.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bains, Upinder. “In-Situ Continuous Monitoring of Catastrophic Phase Inversion and Viscosity of Pickering Emulsions.” 2018. Web. 18 Feb 2019.
Vancouver:
Bains U. In-Situ Continuous Monitoring of Catastrophic Phase Inversion and Viscosity of Pickering Emulsions. [Internet] [Thesis]. University of Waterloo; 2018. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/10012/13335.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bains U. In-Situ Continuous Monitoring of Catastrophic Phase Inversion and Viscosity of Pickering Emulsions. [Thesis]. University of Waterloo; 2018. Available from: http://hdl.handle.net/10012/13335
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta
15.
Khademi, Sima.
Effect of Solid Contamination on Stability of Model
Oil-Water Emulsions.
Degree: MS, Department of Chemical and Materials
Engineering, 2012, University of Alberta
URL: https://era.library.ualberta.ca/files/7s75dd721
► Stabilization of water droplets in froth treatment process results in poor de-watering efficiency and potentially affects final bitumen quality. The purpose of this research is…
(more)
▼ Stabilization of water droplets in froth treatment
process results in poor de-watering efficiency and potentially
affects final bitumen quality. The purpose of this research is to
study the effect of solid contamination by diluted bitumen on water
droplet stabilization in water in oil emulsions. To model froth
solids different types of minerals were ground to similar sizes and
exposed to solutions of different bitumen concentrations as
encountered in froth cleaning process. Complementary surface
characterization techniques were used to characterize surface
composition. It was revealed that all type of minerals were capable
of adsorbing bitumen components when the solid surface was dry. To
mimic the cleaning process, contaminated solids were added to the
diluted bitumen and water so that the emulsion formation could be
studied and linked with surface properties of solids. The results
from this study indicated that partially hydrophobic kaolinite,
siderite and silica could stabilize water droplets very
well.
Subjects/Keywords: emulsions; solid contamination
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Khademi, S. (2012). Effect of Solid Contamination on Stability of Model
Oil-Water Emulsions. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/7s75dd721
Chicago Manual of Style (16th Edition):
Khademi, Sima. “Effect of Solid Contamination on Stability of Model
Oil-Water Emulsions.” 2012. Masters Thesis, University of Alberta. Accessed February 18, 2019.
https://era.library.ualberta.ca/files/7s75dd721.
MLA Handbook (7th Edition):
Khademi, Sima. “Effect of Solid Contamination on Stability of Model
Oil-Water Emulsions.” 2012. Web. 18 Feb 2019.
Vancouver:
Khademi S. Effect of Solid Contamination on Stability of Model
Oil-Water Emulsions. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2019 Feb 18].
Available from: https://era.library.ualberta.ca/files/7s75dd721.
Council of Science Editors:
Khademi S. Effect of Solid Contamination on Stability of Model
Oil-Water Emulsions. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/7s75dd721

Victoria University of Wellington
16.
Monahan, Nicholas.
Structure and Rheology of Monodisperse and Bimodal Emulsions.
Degree: 2010, Victoria University of Wellington
URL: http://hdl.handle.net/10063/1401
► Emulsions are the basis for many commercial products such as foodstuffs and paint due in part to their highly tunable flow properties. It is qualitatively…
(more)
▼ Emulsions are the basis for many commercial products such as foodstuffs and paint
due in part to their highly tunable flow properties. It is qualitatively understood that
factors such as the dispersed phase droplet size and size distribution should affect
how an emulsion flows because they influence how droplets can deform or pack.
Since standard emulsification techniques such as blending and homogenization cannot
produce
emulsions with well-defined size distributions, little work has been done to,
in particular, quantitatively determine the influence of droplet size distribution on
emulsion flow properties. Consequently, in this investigation we have probed how the
droplet size distribution affects emulsion flow properties by using model monodisperse
emulsion systems with narrow, controllable droplet size distributions.
Using a microfluidic flow focusing device, dodecane-in-water
emulsions with diameters
between 50 to 100 m with polydispersities less than 5% were produced, as characterized
by pulsed field gradient nuclear magnetic resonance and optical microscopy. Due
to the relatively large size of the droplets, it was only possible to examine the creamed
phase of the emulsion. Samples of known polydispersity were made by mixing known
quantities of two monodisperse
emulsions. The monodisperse and bimodal
emulsions
were then subjected to rotational and oscillatory shear flow using a controlled stress
rheometer to determine the effects of droplet size and size distribution on emulsion
flow properties.
Rotational and oscillatory rheological experiments showed that the monodisperse
emulsions had two distinct behaviours: foam-like with appreciable thixotropy and
yield stresses as well as emulsion-like with no evident thixotropy. The transition
between these two behaviours appears to happen at a critical droplet radius between
33 and 37 micrometres. The rheological properties of the bimodal
emulsions was split into
three distinct behaviours. In samples that could be considered a matrix of large
droplets perturbed by smaller droplets, the flow properties were similar to those of
the constituent emulsion with the larger droplets. Increasing the number fraction of
smaller droplets to a 1:1 ratio creates an entirely new phase with significantly reduced
elastic properties. Surprisingly, when the emulsion primarily consists of small droplets,
the flow properties are most similar to that of the large droplets. Additionally, despite
the microstructural differences, all
emulsions showed flow characteristics typical of
soft glassy materials above the glass transition temperature.
These results demonstrate the significant influence of microstructure on emulsion
rheology, where altering the droplet size or polydispersity essentially creates a new
phase with its own unique flow properties that is not simply a combination of the
properties of the individual monodisperse components that make up the sample
Advisors/Committee Members: McGrath, Kathryn.
Subjects/Keywords: Emulsions; Rheology; Microfluidics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Monahan, N. (2010). Structure and Rheology of Monodisperse and Bimodal Emulsions. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/1401
Chicago Manual of Style (16th Edition):
Monahan, Nicholas. “Structure and Rheology of Monodisperse and Bimodal Emulsions.” 2010. Masters Thesis, Victoria University of Wellington. Accessed February 18, 2019.
http://hdl.handle.net/10063/1401.
MLA Handbook (7th Edition):
Monahan, Nicholas. “Structure and Rheology of Monodisperse and Bimodal Emulsions.” 2010. Web. 18 Feb 2019.
Vancouver:
Monahan N. Structure and Rheology of Monodisperse and Bimodal Emulsions. [Internet] [Masters thesis]. Victoria University of Wellington; 2010. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/10063/1401.
Council of Science Editors:
Monahan N. Structure and Rheology of Monodisperse and Bimodal Emulsions. [Masters Thesis]. Victoria University of Wellington; 2010. Available from: http://hdl.handle.net/10063/1401
17.
Metidji, Karima.
Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut.
Degree: 2011, Université M'Hamed Bougara Boumerdès
URL: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/307
► 84 p. ; ill. ; 30 cm
Les émulsions pétrolières sont des systèmes complexes très souvent rencontrés à tous les niveaux de l'industrie pétrolière :…
(more)
▼ 84 p. ; ill. ; 30 cm
Les émulsions pétrolières sont des systèmes complexes très souvent rencontrés à tous les niveaux de l'industrie pétrolière : production du pétrole brut, transport, traitement en raffinerie et d'autres. Elles augmentent le volume et la viscosité de brut, qui s'ajoutent de manière significative aux frais d'exploitation. Il est bien connu que la stabilité de ces émulsions dépend principalement de la présence d'un film rigide sur l'interface eau/huile. Ce film se compose des émulsifiants qui ne sont certes que des asphaltènes et des résines, constituants naturels de pétrole brut. L'objectif de ce travail est d'identifier les paramètres du processus d'agrégation d'asphaltènes et par la suite étudier l'influence de ces derniers sur la stabilité des bruts de HassiMessaoud et d'Adrar. Une caractérisation physico-chimique de pétrole brut de Hassi Messaoud et d'Adrar a été effectuée en particulier la composition chimique à l'aide de la chromatographie en phase gazeuse et la composition SARA à l'aide de la chromatographie TLC/FID. Les principaux groupes fonctionnels composant les asphaltènes d'Adrar ont été identifiés grâce à la spectrométrie infrarouge. Les résultats d'études de stabilité d'agrégation ont montré que les asphaltènes en milieu aliphatique forment les plus grands agrégats. Il a été constaté que la présence des solvants aromatiques ou un excès de résines de pétrole réduit le degré d'agrégation. Au cours de ce travail, des échantillons d'émulsion ont été préparés à partir de pétrole de Hassi Messaoud, d'Adrar et les maltènes d'Adrar afin d'étudier l'effet des propriétés physico-chimiques et la composition chimique de la phase huileuse sur la stabilité des émulsions eau-brut. Les résultats indiquant que les huiles les plus lourdes et les plus riches en asphaltènes forment les émulsions les plus stables. Aussi nous nous sommes proposés d'étudier l'effet de la température, du pH d'eau, de la teneur en asphaltènes et de l'aromaticité du brut. Ces essais ont montré que la concentration des asphaltènes, le rapport résines/asphaltènes et la solubilité des asphaltènes sont les facteurs primaires régissant la stabilité des émulsions eau-pétrole brut
Subjects/Keywords: Asphaltènes; Emulsions; Pétroliers
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
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to Zotero / EndNote / Reference
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APA (6th Edition):
Metidji, K. (2011). Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/307
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Metidji, Karima. “Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut.” 2011. Thesis, Université M'Hamed Bougara Boumerdès. Accessed February 18, 2019.
http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/307.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Metidji, Karima. “Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut.” 2011. Web. 18 Feb 2019.
Vancouver:
Metidji K. Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2011. [cited 2019 Feb 18].
Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/307.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Metidji K. Influence des asphaltènes sur la stabilité des émulsions : eau - pétrole brut. [Thesis]. Université M'Hamed Bougara Boumerdès; 2011. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/307
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
18.
Chen, Yen-an.
Study on Lubrication Film of Emulsion Using Laser Measurement Method.
Degree: Master, Mechanical and Electro-Mechanical Engineering, 2008, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132805
► Abstract Since emulsions combine good lubricating and cooling capabilities, they have been widely used in metal rolling and cutting. This study first uses AR2000 rheometer…
(more)
▼ Abstract
Since
emulsions combine good lubricating and cooling capabilities, they have been widely used in metal rolling and cutting. This study first uses AR2000 rheometer to measure viscosity of
emulsions under atmospheric pressure. The results of the test show that the viscosity of
emulsions is approximately the highest in the 80% oil volume fraction. Meanwhile, the viscosity drops along with increasing the shear rate, it proves that
emulsions are a pseudoplastic fluid.
This study uses an EHL squeeze tester to explore the effects of squeeze velocity, load and volume fraction concentration of oil phase of
emulsions on the dimple film thickness in the contact conjunction of squeezing lubrication. Results show that the dimple becomes deeper with increasing squeeze velocity. When the load increases, the dimple can keep longer due to higher hertz pressure. Furthermore,
emulsions which have the higher oil volume fraction, have the higher maximum dimple depth under the same load and squeeze velocity. The results are different that the viscosity of 80%
emulsions is higher than crude oil under atmospheric pressure. It is because that the significantly effect of pressure on the viscosity of oil phase, and the surface viscosity between oil and water phases can be ignored.
Keywords:
emulsions, EHL, dimple
Advisors/Committee Members: Chang, Yuh-Ping (chair), Chiou, Yuang-Cherng (committee member), Chu, Li-Ming (chair), Lee, Rong-Tsong (committee member).
Subjects/Keywords: emulsions; EHL; dimple
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, Y. (2008). Study on Lubrication Film of Emulsion Using Laser Measurement Method. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132805
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chen, Yen-an. “Study on Lubrication Film of Emulsion Using Laser Measurement Method.” 2008. Thesis, NSYSU. Accessed February 18, 2019.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132805.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Yen-an. “Study on Lubrication Film of Emulsion Using Laser Measurement Method.” 2008. Web. 18 Feb 2019.
Vancouver:
Chen Y. Study on Lubrication Film of Emulsion Using Laser Measurement Method. [Internet] [Thesis]. NSYSU; 2008. [cited 2019 Feb 18].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132805.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen Y. Study on Lubrication Film of Emulsion Using Laser Measurement Method. [Thesis]. NSYSU; 2008. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0908108-132805
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cape Peninsula University of Technology
19.
Mudeme, Sipho.
Drop formation and rupture in shearing during processing of highly concentrated emulsions
.
Degree: 2009, Cape Peninsula University of Technology
URL: http://etd.cput.ac.za/handle/20.500.11838/2164
► The purpose of emulsification process is to create numerous small droplets from a large and homogenous oil phase. The emulsion used for this study is…
(more)
▼ The purpose of emulsification process is to create numerous small droplets from a large and
homogenous oil phase. The emulsion used for this study is new thermodynamically unstable
multi-component water-in-oil (w/o) explosive type with an internal phase ratio of approximately
94% (wt), i.e. far beyond the close packing limit of spherical droplets of 74%. However, little work
has been done for this system, pertaining to the literature explaining what physical phenomena
plays a major role in the process of drop formation during highly concentrated emulsion (HGE)
manufacturing. This thesis is devoted to develop an understanding of what parameters control
drop formation and rupture during processing of highly concentrated emulsions. The material used for the study consisted of three Pibsa derivatives (MEA, IMIDE and UREA),
one mixture (MEA/SMO, 10:1) and SMO. Two concentrations were used namely 8% and 14%
and the two fuel phase material were Mosspar-H and Shell sol. The Pibsa IMIDE was carried out
in both oil phases. To carry out the study, the Hobart N50 mixer coupled with a power and
harmonic analyser to record power as a function of time was used to manufacture all samples
for the study.
Subjects/Keywords: Emulsions;
Drops;
Rheology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mudeme, S. (2009). Drop formation and rupture in shearing during processing of highly concentrated emulsions
. (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/2164
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mudeme, Sipho. “Drop formation and rupture in shearing during processing of highly concentrated emulsions
.” 2009. Thesis, Cape Peninsula University of Technology. Accessed February 18, 2019.
http://etd.cput.ac.za/handle/20.500.11838/2164.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mudeme, Sipho. “Drop formation and rupture in shearing during processing of highly concentrated emulsions
.” 2009. Web. 18 Feb 2019.
Vancouver:
Mudeme S. Drop formation and rupture in shearing during processing of highly concentrated emulsions
. [Internet] [Thesis]. Cape Peninsula University of Technology; 2009. [cited 2019 Feb 18].
Available from: http://etd.cput.ac.za/handle/20.500.11838/2164.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mudeme S. Drop formation and rupture in shearing during processing of highly concentrated emulsions
. [Thesis]. Cape Peninsula University of Technology; 2009. Available from: http://etd.cput.ac.za/handle/20.500.11838/2164
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Massey University
20.
Sarkar, Anwesha.
Behaviour of milk protein-stabilized oil-in-water emulsions in simulated physiological fluids.
Degree: PhD, Food Technology, 2010, Massey University
URL: http://hdl.handle.net/10179/1409
► Emulsions form a major part of processed food formulations, either being the end products in themselves or as parts of a more complex food system.…
(more)
▼ Emulsions form a major part of processed food formulations, either being the end
products in themselves or as parts of a more complex food system. For the past
few decades, colloid scientists have focussed mainly on the effects of processing
conditions (e.g. heat, high pressure, and shear) on the physicochemical properties
of emulsions (e.g. viscosity, droplet size distribution and phase stability).
However, the information about the behaviour of food structures post
consumption is very limited. Fundamental knowledge of how the food structures
behave in the mouth is critical, as these oral interactions of food components
influence the common sensorial perceptions (e.g. creaminess, smoothness) and
the release of fat-soluble flavours. Initial studies also suggest that the breakdown
of emulsions in the gastrointestinal tract and the generated interfacial structures
impact lipid digestion, which can consequently influence post-prandial metabolic
responses. This area of research needs to be intensively investigated before the
knowledge can be applied to rational design of healthier food structures that
could modulate the rate of lipid metabolism, bioavailability of nutrients, and also
help in providing targeted delivery of flavour molecules and/or bioactive
components.
Hence, the objective of this research was to gain understanding of how emulsions
behave during their passage through the gastrointestinal tract. In vitro digestion
models that mimic the physicochemical processes and biological conditions in
the mouth and gastrointestinal tract were successfully employed. Behaviour of
model protein-stabilized emulsions (both positively charged (lactoferrin) as well
as negatively charged [β-lactoglobulin (β-lg)] oil-in-water emulsions) at each step
of simulated physiological processing (using model oral, gastric and duodenal
fluids individually) were investigated.
In simulated mouth conditions, oil-in-water emulsions stabilized by lactoferrin or
β-lg at the interfacial layers were mixed with artificial saliva at neutral pH that
contained a range of mucin concentrations and salts. The β-lg emulsions did not
interact with the artificial saliva due to the dominant repulsion between mutually
opposite charges of anionic mucin and anionic β-lg interfacial layer at neutral pH.
However, β-lg emulsions underwent some depletion flocculation on addition of
higher concentrations of mucin due to the presence of unadsorbed mucin
molecules in the continuous phase. In contrast, positively charged lactoferrin
emulsions showed considerable salt-induced aggregation in the presence of salts
(from the saliva) alone. Furthermore, lactoferrin emulsions underwent bridging
flocculation because of electrostatic binding of anionic mucin to the positively
charged lactoferrin-stabilized emulsion droplets.
In acidic pH conditions (pH 1.2) of the simulated gastric fluid (SGF), both
protein-stabilized emulsions were positively charged. Addition of pepsin resulted
in extensive droplet flocculation in both emulsions with…
Subjects/Keywords: Milk proteins;
Emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sarkar, A. (2010). Behaviour of milk protein-stabilized oil-in-water emulsions in simulated physiological fluids. (Doctoral Dissertation). Massey University. Retrieved from http://hdl.handle.net/10179/1409
Chicago Manual of Style (16th Edition):
Sarkar, Anwesha. “Behaviour of milk protein-stabilized oil-in-water emulsions in simulated physiological fluids.” 2010. Doctoral Dissertation, Massey University. Accessed February 18, 2019.
http://hdl.handle.net/10179/1409.
MLA Handbook (7th Edition):
Sarkar, Anwesha. “Behaviour of milk protein-stabilized oil-in-water emulsions in simulated physiological fluids.” 2010. Web. 18 Feb 2019.
Vancouver:
Sarkar A. Behaviour of milk protein-stabilized oil-in-water emulsions in simulated physiological fluids. [Internet] [Doctoral dissertation]. Massey University; 2010. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/10179/1409.
Council of Science Editors:
Sarkar A. Behaviour of milk protein-stabilized oil-in-water emulsions in simulated physiological fluids. [Doctoral Dissertation]. Massey University; 2010. Available from: http://hdl.handle.net/10179/1409

Western Carolina University
21.
Ballew, Stephen Daniel.
Rheological characteristics of aqueous wax emulsions used
for the controlled release of pheromones as an alternative to the
use of pesticides for insect pest management.
Degree: 2011, Western Carolina University
URL: http://libres.uncg.edu/ir/listing.aspx?styp=ti&id=9011
► Most pesticides produce some risk of harm to the environment because pesticides are designed to kill or adversely affect living organisms (US EPA, 2010). It…
(more)
▼ Most pesticides produce some risk of harm to the
environment because pesticides are designed to kill or adversely
affect living organisms (US EPA, 2010). It is desirable that
alternate, safer forms of pest control be developed. One
alternative is the controlled release of pest insect sex pheromones
to produce a mating disruption effect (Ahmed et al., 1993;
Atterholt, 1996). Aqueous paraffin wax
emulsions have shown much
promise as formulations for this controlled release when applied to
tree bark or foliage (Atterholt et al., 1996; Rice et al., 1997;
Atterholt et al., 1998; Atterholt et al., 1999; Meissner et al.,
2000; de Lame, 2003). Soy wax has recently become of interest in
pheromone formulations because it is renewable, biodegradable,
commercially available, and acceptable for organic farming (Behle,
2008).
Emulsions exhibit complex flow behavior which can be studied
using rheometry (Macosko, 1994; Mezger, 2006). Rheometry refers to
experimental techniques to determine the fundamental relationships
between force and deformation in materials (Macosko, 1994). The
rheological properties of
emulsions are very important for
production, storage, and application of these formulations (Mezger,
2006). In this project the flow and viscoelastic properties of
aqueous 30% paraffin wax and soy wax
emulsions were investigated
using three different emulsifiers: sorbitan monostearate (Span
60®), triethanolamine (TEA) stearate, and a 50%-50% mixture of
both. Span 60® has already been used to make effective
emulsions
for the controlled release of pheromones, and it is food safe
(Atterholt et al., 1996; Rice et al., 1997; Atterholt et al., 1998;
Atterholt et al., 1999; Meissner et al., 2000; de Lame, 2003). TEA
stearate is widely used to make nontoxic wax
emulsions in the
cosmetics industry (Wilkinson, 1940). The investigations were
carried out in both the rotational and oscillatory modes of a
parallel-plate rheometer. The flow curves at three different
temperatures (15 °C, 25 °C and 35 °C) of each emulsion were fitted
with the Herschel-Bulkley model with the yield points determined
using the one tangent method. The resulting equations can predict
flow behavior at different conditions (Mezger, 2006). The
emulsions
were also tested using a temperature sweep at low shear from 15 °C
to 50 °C to investigate temperature dependent changes. The
viscoelastic properties were investigated using oscillatory shear
tests and expressed in terms of elastic modulus and loss modulus.
This gives information about time-dependant behavior like storage
and the elastic character of the formulations which were found to
be weak gels (Mezger, 2006). The Span 60®
emulsions displayed faux
shear-thickening behavior due to droplet subdivision while the
other
emulsions generally displayed shear-thinning behavior. Each
emulsion approaches an infinite shear viscosity. The yield points
and other flow parameters for the
emulsions varied with
temperature, depending on the formulation in question. All soy wax
emulsions showed an increase in viscosity between 45 °C…
Advisors/Committee Members: Cynthia Atterholt (advisor).
Subjects/Keywords: Pheromones; Emulsions; Rheology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ballew, S. D. (2011). Rheological characteristics of aqueous wax emulsions used
for the controlled release of pheromones as an alternative to the
use of pesticides for insect pest management. (Masters Thesis). Western Carolina University. Retrieved from http://libres.uncg.edu/ir/listing.aspx?styp=ti&id=9011
Chicago Manual of Style (16th Edition):
Ballew, Stephen Daniel. “Rheological characteristics of aqueous wax emulsions used
for the controlled release of pheromones as an alternative to the
use of pesticides for insect pest management.” 2011. Masters Thesis, Western Carolina University. Accessed February 18, 2019.
http://libres.uncg.edu/ir/listing.aspx?styp=ti&id=9011.
MLA Handbook (7th Edition):
Ballew, Stephen Daniel. “Rheological characteristics of aqueous wax emulsions used
for the controlled release of pheromones as an alternative to the
use of pesticides for insect pest management.” 2011. Web. 18 Feb 2019.
Vancouver:
Ballew SD. Rheological characteristics of aqueous wax emulsions used
for the controlled release of pheromones as an alternative to the
use of pesticides for insect pest management. [Internet] [Masters thesis]. Western Carolina University; 2011. [cited 2019 Feb 18].
Available from: http://libres.uncg.edu/ir/listing.aspx?styp=ti&id=9011.
Council of Science Editors:
Ballew SD. Rheological characteristics of aqueous wax emulsions used
for the controlled release of pheromones as an alternative to the
use of pesticides for insect pest management. [Masters Thesis]. Western Carolina University; 2011. Available from: http://libres.uncg.edu/ir/listing.aspx?styp=ti&id=9011

University of Minnesota
22.
Zhang, Jian.
Novel emulsion-based delivery systems.
Degree: PhD, Food science, 2011, University of Minnesota
URL: http://purl.umn.edu/117545
► Novel emulsions with useful attributes such as improved stability, clarity and label friendliness were investigated in this thesis. Overall, this thesis has three parts: the…
(more)
▼ Novel emulsions with useful attributes such as improved stability, clarity and label friendliness were investigated in this thesis. Overall, this thesis has three parts: the first part systematically studied the formation and optical properties of nanoemulsions; the second part focused on formation and beverage cloud application of multilayer emulsions; and the third part evaluated the formation, stability and beverage cloud application of multiple phase emulsions.
In part 1, nanoemulsions were prepared using four different food grade biopolymers (different concentrations) and high pressure homogenization (Microfluidizer®, different pressures, temperature and number of passes). It was found that increasing number of passes through the microfluidizer led to a wider particle size distribution. The effect of oil types on mean droplet diameter (MDD) was complex being dependent on the emulsifier, homogenization pressure, phase viscosity and number of passes. It was also found that interface composition, relative refractive index, volume fraction of dispersed phase and droplet size influenced the turbidity. A polynomial relationship was found between MDD and turbidity within the MDD range of 80 to 400 nm. The effects of lipid phase and interface composition on turbidity were droplet size dependent. A linear relationship between volume fraction of dispersed phase and turbidity was established. Experiment results demonstrated that matching refractive indices between phases led to clear emulsions. Finally the primary destabilization mechanism of MCT nanoemulsions emulsified with modified starch was identified as coalescence from a two-week shelf life study. In part 2 of this thesis, the ability to prepare secondary and tertiary beverage cloud emulsions using a layer-by-layer deposition technique was developed. Proteins, β-lactoglobulin (L) and sodium caseinate (S), were selected to stabilize the primary emulsions. Biopolymers of sodium alginate (S), ι-carrageenan (C), gum Arabic (G), pectin (P), chitosan (Ch) and gelatin (Ge) were evaluated as secondary and tertiary layers. Biopolymer concentration and pH were found critical to the formation of stable multilayer emulsions. Protein and polysaccharide type also impacted droplet size and δ-potential of multilayer emulsions. Interestingly, β-lactoglobulin was found better than sodium caseinate in forming protein-polysaccharide interfacial complexes as demonstrated by smaller MDD of LA, LP and LC than those of SA, SP and SC. It was also found biopolymer concentration has to be above a critical value (0.2 ~ 0.5% w/w) to prevent multilayer emulsions from bridging flocculation. Our data showed that both secondary (LA, LC, LG) and tertiary (LGC) emulsions formed by electrostatic deposition could provide the same performance as traditional emulsifiers of gum Arabic (G) and modified starch (M). After four weeks of storage at room temperature, beverage clouds stabilized with G, M, LA, LC, LG and LGCh showed MDDs of 0.68, 0.67, 0.90, 0.82, 0.65 and 2.2 μm, respectively, and turbidity…
Subjects/Keywords: Beverage Cloud Application; Double Emulsions; Emulsions Stability; Multilayer Emulsions; Nanoemulsion; Optical Properties; Food Science
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, J. (2011). Novel emulsion-based delivery systems. (Doctoral Dissertation). University of Minnesota. Retrieved from http://purl.umn.edu/117545
Chicago Manual of Style (16th Edition):
Zhang, Jian. “Novel emulsion-based delivery systems.” 2011. Doctoral Dissertation, University of Minnesota. Accessed February 18, 2019.
http://purl.umn.edu/117545.
MLA Handbook (7th Edition):
Zhang, Jian. “Novel emulsion-based delivery systems.” 2011. Web. 18 Feb 2019.
Vancouver:
Zhang J. Novel emulsion-based delivery systems. [Internet] [Doctoral dissertation]. University of Minnesota; 2011. [cited 2019 Feb 18].
Available from: http://purl.umn.edu/117545.
Council of Science Editors:
Zhang J. Novel emulsion-based delivery systems. [Doctoral Dissertation]. University of Minnesota; 2011. Available from: http://purl.umn.edu/117545
23.
Tir, Mohamed.
Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau.
Degree: 2008, Université M'Hamed Bougara Boumerdès
URL: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/138
► 174 p. ; ill. ; 30 cm
L’objectif de ce travail est l’application des techniques électrochimiques pour le traitement des émulsions d’huile de coupe. Pour…
(more)
▼ 174 p. ; ill. ; 30 cm
L’objectif de ce travail est l’application des techniques électrochimiques pour le traitement des émulsions d’huile de coupe. Pour aboutir à cet objectif, une série d’essais a été réalisé dans un réacteur électrochimique fonctionnant en batch. La technique d'électroflottation s’est avérée inefficace pour le traitement d’émulsions concentrées. Le couplage de cette dernière avec la floculation chimique a donné d’excellents résultats pour le traitement des émulsions huile-eau (4% massique). La conduite des expériences a été réalisée en utilisant une méthodologie expérimentale basée sur une modélisation en surface de réponses (RSM). Le traitement des émulsions d’huile de coupe par électrocoagulation a montré que cette méthode électrolytique est très efficace pour l’abattement de la turbidité et de la DCO. Les résultats expérimentaux ont indiqué que l'électrocoagulation était très efficace et capable de réaliser un abattement de la turbidité et de la DCO de 99% et de 90% respectivement et cela pour une densité de courant, 25mAcm−2, et un temps de traitement de 22min. L'analyse de la variance ANOVA a montré une valeur élevée du coefficient de détermination (R2= 0.998), ce qui montre qu’un ajustement satisfaisant est assuré par le modèle de régression de second ordre entre les données expérimentales et estimées l’étude comparative basée sur l’efficacité de traitement et la consommation énergétique a montré que l’électrocoagulation et le couplage de l'électroflottation avec la floculation semblent des procédés plus efficaces que le procédé d’électroflottation dans ce genre d’opérations
Subjects/Keywords: Floculation; Eau; Emulsions; Electrochimie : Technique
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tir, M. (2008). Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/138
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tir, Mohamed. “Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau.” 2008. Thesis, Université M'Hamed Bougara Boumerdès. Accessed February 18, 2019.
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/138.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tir, Mohamed. “Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau.” 2008. Web. 18 Feb 2019.
Vancouver:
Tir M. Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2008. [cited 2019 Feb 18].
Available from: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/138.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tir M. Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau. [Thesis]. Université M'Hamed Bougara Boumerdès; 2008. Available from: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/138
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Colorado
24.
Martin, Richard Michael.
Derivation and Applications of a Generalized Oldroyd Constitutive Model.
Degree: PhD, 2017, University of Colorado
URL: http://scholar.colorado.edu/chbe_gradetds/108
► The search for relevant constitutive models valid for a broad variety of non-Newtonian fluids is an urgent problem in rheology. These constitutive models must…
(more)
▼ The search for relevant constitutive models valid for a broad variety of non-Newtonian fluids is an urgent problem in rheology. These constitutive models must accurately capture many of the non-Newtonian behaviors of the fluids and be valid for arbitrary kinematics. Many constitutive models have been proposed, but are sometimes limited in their scope of application. Some constitutive models are only valid for a specific type of fluid, and other models have many material parameters that cannot be readily evaluated. In this work, a generalized Oldroyd model is developed that can be applied to a broad range of complex, non-Newtonian fluids. The generalized Oldroyd model consists of five material parameters, that can be evaluated based on the rheological functions of two base flows – simple shear and planar extension. The material parameters are allowed to be functions of an invariant of the flow, which is chosen to be the energy dissipation rate in this work. The generalized Oldroyd equation is applied to three non-Newtonian suspensions: dilute
emulsions, suspensions of rigid spheroids
subject to Brownian rotations, and dilute
emulsions in the presence of surfactants. A variety of kinematics is explored to validate the effectiveness of the generalized Oldroyd equation, including calculation of the stress components in planar mixed flows and uniaxial extension/compression. A number of Lagrangian-unsteady flows are also explored to test the generalized Oldroyd method in nontrivial time-dependent flows. The Lagrangian-unsteady flows that are explored in this work include: flow in a rectangular cavity with a moving wall; flow around a macroscopic sphere; time-dependent planar extension; flow around a macroscopic sphere at a finite Reynolds number; and flow between two eccentric spheres. For these Lagrangian-unsteady cases, a material fluid element is advected along one of the streamlines in the flow, and the stress is calculated along the streamline. The generalized Oldroyd model is shown in all cases to accurately predict the stresses, with greater accuracy in slower flows. The generalized Oldroyd equation in this work is shown to be a broad constitutive model that can be applied to a variety of complex fluids in arbitrary kinematics.
Advisors/Committee Members: Robert Davis, Robert Davis, Alexander Zinchenko, Richard Regueiro, Christine Hrenya.
Subjects/Keywords: CFD; emulsions; rheology; Chemical Engineering
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Martin, R. M. (2017). Derivation and Applications of a Generalized Oldroyd Constitutive Model. (Doctoral Dissertation). University of Colorado. Retrieved from http://scholar.colorado.edu/chbe_gradetds/108
Chicago Manual of Style (16th Edition):
Martin, Richard Michael. “Derivation and Applications of a Generalized Oldroyd Constitutive Model.” 2017. Doctoral Dissertation, University of Colorado. Accessed February 18, 2019.
http://scholar.colorado.edu/chbe_gradetds/108.
MLA Handbook (7th Edition):
Martin, Richard Michael. “Derivation and Applications of a Generalized Oldroyd Constitutive Model.” 2017. Web. 18 Feb 2019.
Vancouver:
Martin RM. Derivation and Applications of a Generalized Oldroyd Constitutive Model. [Internet] [Doctoral dissertation]. University of Colorado; 2017. [cited 2019 Feb 18].
Available from: http://scholar.colorado.edu/chbe_gradetds/108.
Council of Science Editors:
Martin RM. Derivation and Applications of a Generalized Oldroyd Constitutive Model. [Doctoral Dissertation]. University of Colorado; 2017. Available from: http://scholar.colorado.edu/chbe_gradetds/108

Texas A&M University
25.
Martinez Cedillo, Arturo Rey.
Enhanced Heavy Oil Recovery by Emulsification With Injected Nanoparticles.
Degree: 2013, Texas A&M University
URL: http://hdl.handle.net/1969.1/151854
► In-situ oil-in-water emulsion generation, using modified silica hydrophilic nanoparticles as emulsifier, has been proposed as an enhanced oil recovery process. The nanoparticles are injected as…
(more)
▼ In-situ oil-in-water emulsion generation, using modified silica hydrophilic nanoparticles as emulsifier, has been proposed as an enhanced oil recovery process. The nanoparticles are injected as an aqueous dispersion; its hydrophilic character allows emulsifying the immobile heavy oil, and transports it out of the reservoir as a low viscosity fluid. Generating the
emulsions in the reservoir was suggested because it offers numerous advantages. The first advantage is low injectivity pressures due to the low dispersion viscosity. Also, the size of nanoparticles (5 nm) yields a better emulsion stability. Furthermore, complex injection facilities are not required, which reduces operational costs.
In this research, 12 nanoparticle dispersions were created using nanoparticle concentrations of 0.5, 2.0 and 5.0 wt%, deionized water or brine made with 0.5 wt% of Sodium Chloride. These dispersions were tested to investigate their ability to generate oil-in-water
emulsions. Emulsion generation experiments included interfacial tension measurements between heavy oil and nanoparticle dispersions, microscopy analysis to determine the amount of emulsion generated, and emulsion viscosity measurements. Results obtained from these experiments indicated that the nanoparticles lead to a reduction of the interfacial tension of the heavy oil and the dispersion. In addition, the presence of Sodium Chloride in the dispersion reduced still more of that interfacial tension, generating the largest amount of
emulsions.
Six core flooding experiments were conducted to study the effect of the nanoparticle dispersion flooding on the final recovery under different settings. Two types of core plugs with permeabilities of 150 mD and 2,300 mD, and two heavy oils with viscosities of 600 cP and 3500 cP were combined to establish the original experiment conditions. Tertiary heavy oil recoveries ranged from 20% to 64 % of OOIP were obtained. The results throughout these experiments suggest that if the reservoir conditions (e.g. permeability, porosity and oil viscosity) are adequate, the nanoparticle dispersion flooding may be a reliable alternative to the thermal recovery processes.
Advisors/Committee Members: Lane , Robert H (advisor), Barrufet, Maria A (committee member), Sun, Yuefeng (committee member).
Subjects/Keywords: Nanoparticles; Emulsions; Heavy Oil
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Martinez Cedillo, A. R. (2013). Enhanced Heavy Oil Recovery by Emulsification With Injected Nanoparticles. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151854
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Martinez Cedillo, Arturo Rey. “Enhanced Heavy Oil Recovery by Emulsification With Injected Nanoparticles.” 2013. Thesis, Texas A&M University. Accessed February 18, 2019.
http://hdl.handle.net/1969.1/151854.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Martinez Cedillo, Arturo Rey. “Enhanced Heavy Oil Recovery by Emulsification With Injected Nanoparticles.” 2013. Web. 18 Feb 2019.
Vancouver:
Martinez Cedillo AR. Enhanced Heavy Oil Recovery by Emulsification With Injected Nanoparticles. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/1969.1/151854.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Martinez Cedillo AR. Enhanced Heavy Oil Recovery by Emulsification With Injected Nanoparticles. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151854
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
26.
Tir, Mohamed.
Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau.
Degree: 2008, Université M'Hamed Bougara Boumerdès
URL: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/505
► 174 p. ; ill. ; 30 cm
L’objectif de ce travail est l’application des techniques électrochimiques pour le traitement des émulsions d’huile de coupe. Pour…
(more)
▼ 174 p. ; ill. ; 30 cm
L’objectif de ce travail est l’application des techniques électrochimiques pour le traitement des émulsions d’huile de coupe. Pour aboutir à cet objectif, une série d’essais a été réalisé dans un réacteur électrochimique fonctionnant en batch. La technique d'électroflottation s’est avérée inefficace pour le traitement d’émulsions concentrées. Le couplage de cette dernière avec la floculation chimique a donné d’excellents résultats pour le traitement des émulsions huile-eau (4% massique). La conduite des expériences a été réalisée en utilisant une méthodologie expérimentale basée sur une modélisation en surface de réponses (RSM). Le traitement des émulsions d’huile de coupe par électrocoagulation a montré que cette méthode électrolytique est très efficace pour l’abattement de la turbidité et de la DCO. Les résultats expérimentaux ont indiqué que l'électrocoagulation était très efficace et capable de réaliser un abattement de la turbidité et de la DCO de 99% et de 90% respectivement et cela pour une densité de courant, 25mAcm−2, et un temps de traitement de 22min. L'analyse de la variance ANOVA a montré une valeur élevée du coefficient de détermination (R2= 0.998), ce qui montre qu’un ajustement satisfaisant est assuré par le modèle de régression de second ordre entre les données expérimentales et estimées l’étude comparative basée sur l’efficacité de traitement et la consommation énergétique a montré que l’électrocoagulation et le couplage de l'électroflottation avec la floculation semblent des procédés plus efficaces que le procédé d’électroflottation dans ce genre d’opérations
Subjects/Keywords: Floculation; Eau; Emulsions; Electrochimie : Technique
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tir, M. (2008). Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/505
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tir, Mohamed. “Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau.” 2008. Thesis, Université M'Hamed Bougara Boumerdès. Accessed February 18, 2019.
http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tir, Mohamed. “Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau.” 2008. Web. 18 Feb 2019.
Vancouver:
Tir M. Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2008. [cited 2019 Feb 18].
Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/505.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tir M. Utilisation des techniques électrochimiques dans le traitement des émulsions hydrocarbures/eau. [Thesis]. Université M'Hamed Bougara Boumerdès; 2008. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/505
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Adelaide
27.
Zhang, Mengjue.
Microfluidic system development for drug delivery.
Degree: 2016, University of Adelaide
URL: http://hdl.handle.net/2440/102614
► Development and application of a microfluidic system for generating drug delivery carriers are investigated in this research. Various types of microfluidic devices are designed and…
(more)
▼ Development and application of a microfluidic system for generating drug delivery carriers are investigated in this research. Various types of microfluidic devices are designed and fabricated for peptide nanotubes, liposome vesicles and double
emulsions formation. The microfluidic system offers a better control over the formation process of all three drug delivery carriers. Comparing to traditional methods such as bulk mixing, the process efficiency, size and size distribution of the final products are significantly improved. The results generated show that tuning the flow rate ratios between different reagents from the inlet streams successfully controls the sizes and size distributions of liposomes vesicles. The relationship between the flow rate ratio and the size of the resulting vesicles is established. Macrocycle (AP-169) that was found to self-assemble into an anti-parallel β-sheet nanotube with a triggering agent is successfully synthesized and purified for peptide nanotube self-assembling process. A microfluidic device is designed and fabricated to control the interaction between AP-169 and its self-assembling triggering agent, dimethyl sulfoxide. Double
emulsions with different radii are produced with the microfluidic system by adjusting the flow rate ratio between each phase of the solution, and changing the wetting properties of the microchannels. The stability of double
emulsions is enhanced by introducing various surfactants. The sizes and size distributions of liposomes and double
emulsions have been successfully controlled and optimized for drug delivery. In conclusion, various drug delivery carriers have been successfully generated and optimized with a designed and modified microfluidic system. These products can be further applied in drug encapsulation, biomolecular screening and in vitro compartmentalization in the future.
Advisors/Committee Members: Bi, Jingxiu (advisor), Zhang, Hu (advisor), Biggs, Mark James (advisor), School of Chemical Engineering (school).
Subjects/Keywords: microfluidic; liposomes; double emulsions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, M. (2016). Microfluidic system development for drug delivery. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/102614
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhang, Mengjue. “Microfluidic system development for drug delivery.” 2016. Thesis, University of Adelaide. Accessed February 18, 2019.
http://hdl.handle.net/2440/102614.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhang, Mengjue. “Microfluidic system development for drug delivery.” 2016. Web. 18 Feb 2019.
Vancouver:
Zhang M. Microfluidic system development for drug delivery. [Internet] [Thesis]. University of Adelaide; 2016. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/2440/102614.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhang M. Microfluidic system development for drug delivery. [Thesis]. University of Adelaide; 2016. Available from: http://hdl.handle.net/2440/102614
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cape Peninsula University of Technology
28.
Tshilumbu, Nsenda Ngenda.
Design and development of a novel high performance emulsion explosive using nanoparticles
.
Degree: 2014, Cape Peninsula University of Technology
URL: http://etd.cput.ac.za/handle/20.500.11838/930
► This study investigated water-in-oil (W/O) super-concentrated emulsions used as pumpable explosives. The aqueous phase of the emulsions is a supersaturated nitrate salt solution (at room…
(more)
▼ This study investigated water-in-oil (W/O) super-concentrated emulsions used as pumpable explosives. The aqueous phase of the emulsions is a supersaturated nitrate salt solution (at room temperature), with a volume fraction of approximately 0.9. Instability of such emulsions arises either from crystallization of the dispersed phase in the system during ageing or under high shear conditions. Here, we report an alternative approach to stabilize this highly concentrated W/O emulsion by adding colloidal particles in combination with short amphiphilic molecules. Thus, the primary goal of this research concerned a phenomenological study of the dependence of surfactant-to-particle ratio as well as the particle hydrophobicity index on stability under high shear in the emulsification process, rheological properties and stability against initiation of crystallization of an internal phase both with ageing and under high shear with a view to optimize the time to the start of crystallization of the emulsion both with ageing and under high shear; to elucidate the mechanism of initiation of crystallization of an internal phase (homogeneous or heterogeneous) and shed light in the stabilization mechanism of the emulsion; to determine how the emulsion formulation content affect pumping characteristics as measured by characteristic rheological parameters.
A series of five fumed silica nanoparticles, each with a different hydrophobicity index (HI) in the range of 0.60 – 3, were used in the form of single types of particles as well as binary mixtures. These particles were combined with a low molecular weight conventional surfactant, Sorbitan MonoOleate (SMO), into the oil phase prior to emulsification.
It has been found that regardless of the particle hydrophobicity, fumed nanosilica alone cannot form highly concentrated W/O emulsion up to 90 vol%. Moreover, Pickering emulsions are unstable under shear conditions and thus it is difficult to make highly concentrated W/O pumpable emulsion explosives using only fumed nanosilica.
The correlation between the refinement time and SMO-to-particle ratio showed a deflection point/transitional point in the stabilization mechanism. Below the transitional point the silica content dominates over SMO. Conversely, above the transitional point the particles have little effect and the SMO dominates. A thermodynamic consideration revealed that in this region only SMO is likely to adsorb at the W/O interface and controls the emulsifying process. As
with refinement time, the correlation between the shear modulus and SMO/particle ratio shows a deflection /transitional point which, as before, mark the transition point between regions of particle or SMO domination.
Interestingly, it was found that for each HI, the initiation of crystallization is the most delayed, both on shelf life and under high shear, when the emulsion is prepared with an SMO-to-particle ratio equaling exactly the value at this transitional point. Moreover, the research demonstrated that a drastic change in mechanism of initiation of…
Subjects/Keywords: Emulsions;
Rheology;
Crystallization;
Nanoparticles
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tshilumbu, N. N. (2014). Design and development of a novel high performance emulsion explosive using nanoparticles
. (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/930
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tshilumbu, Nsenda Ngenda. “Design and development of a novel high performance emulsion explosive using nanoparticles
.” 2014. Thesis, Cape Peninsula University of Technology. Accessed February 18, 2019.
http://etd.cput.ac.za/handle/20.500.11838/930.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tshilumbu, Nsenda Ngenda. “Design and development of a novel high performance emulsion explosive using nanoparticles
.” 2014. Web. 18 Feb 2019.
Vancouver:
Tshilumbu NN. Design and development of a novel high performance emulsion explosive using nanoparticles
. [Internet] [Thesis]. Cape Peninsula University of Technology; 2014. [cited 2019 Feb 18].
Available from: http://etd.cput.ac.za/handle/20.500.11838/930.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tshilumbu NN. Design and development of a novel high performance emulsion explosive using nanoparticles
. [Thesis]. Cape Peninsula University of Technology; 2014. Available from: http://etd.cput.ac.za/handle/20.500.11838/930
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cape Peninsula University of Technology
29.
Yakhoub, Hamat Abderrahmane.
Effect of high shearing on the rheological/structural properties of highly concentrated w/o emulsions
.
Degree: 2009, Cape Peninsula University of Technology
URL: http://etd.cput.ac.za/handle/20.500.11838/2163
► Emulsion explosives are classified as highly concentrated water-in-oil emulsions with high droplet volume fraction that exceeding the close packing limit of spherical droplets. These emulsions…
(more)
▼ Emulsion explosives are classified as highly concentrated water-in-oil emulsions with high
droplet volume fraction that exceeding the close packing limit of spherical droplets. These
emulsions are commonly used as re-pumpable materials. Thus, the shearing action resulting
from the transportation process of these materials has a tremendous impact on their
structures and functionality and might reduce the shelf-life and performance of the products.
Therefore the main goal of this research was to investigate the stability of highly
concentrated water-in-oil emulsion under shearing using a newly designed piston-pumping
instrument.
The results of measurement included the droplet size distribution, microscopic observation,
flow and viscoelastic properties of the materials. Neither crystallisation nor other
destabilisation phenomena such as coalescence, partial coalescence, or phase inversion
occurred during the shearing process of these emulsions, regardless of their formulation
content. It was found that the high shearing action within this research experimental window
induced droplet refinement. The changes in droplet size distribution were achieved by multipass
flow through a small orifice set as outlet of the piston-chamber pumping instrument,
and intensive shearing provided the shift of the droplet sizes to the smaller-size side of the
distribution. Their distributions were wider and of Gaussian type. Two models were proposed
and used to fit the refinement evolution and the width of distributions respectively.
Subjects/Keywords: Emulsions;
Rheology;
Drops;
Shear flow
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yakhoub, H. A. (2009). Effect of high shearing on the rheological/structural properties of highly concentrated w/o emulsions
. (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/2163
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yakhoub, Hamat Abderrahmane. “Effect of high shearing on the rheological/structural properties of highly concentrated w/o emulsions
.” 2009. Thesis, Cape Peninsula University of Technology. Accessed February 18, 2019.
http://etd.cput.ac.za/handle/20.500.11838/2163.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yakhoub, Hamat Abderrahmane. “Effect of high shearing on the rheological/structural properties of highly concentrated w/o emulsions
.” 2009. Web. 18 Feb 2019.
Vancouver:
Yakhoub HA. Effect of high shearing on the rheological/structural properties of highly concentrated w/o emulsions
. [Internet] [Thesis]. Cape Peninsula University of Technology; 2009. [cited 2019 Feb 18].
Available from: http://etd.cput.ac.za/handle/20.500.11838/2163.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yakhoub HA. Effect of high shearing on the rheological/structural properties of highly concentrated w/o emulsions
. [Thesis]. Cape Peninsula University of Technology; 2009. Available from: http://etd.cput.ac.za/handle/20.500.11838/2163
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Victoria University of Wellington
30.
Malassagne-Bulgarelli, Nelly.
Emulsion Microstructure and Dynamics.
Degree: 2010, Victoria University of Wellington
URL: http://hdl.handle.net/10063/1493
► Emulsions are kinetically stabilised mixtures of two immiscible fluids (e.g. oil and water). They are encountered in many industrial applications including cosmetics, food, road, drug…
(more)
▼ Emulsions are kinetically stabilised mixtures of two immiscible fluids (e.g. oil and water). They are encountered in many industrial applications including cosmetics, food, road, drug delivery and paint technology. Despite their wide spread use, the formulation of
emulsions remains largely empirical. The nature of the relationships between ingredients, composition, emulsification method and energy input, defining the microstructure (e.g. droplet size distribution and surfactant packing at the oil/water interface), the dynamics (e.g. interdroplet exchange) and the lifetime of
emulsions, is still poorly understood. In particular, little work has focused on the mutual interactions between emulsifier and oil molecules and how these affect the properties of the interfacial domain and emulsion dynamics.
The emulsion system oil/Triton X-100/water was investigated, where Triton X-100 is a commercially available non ionic surfactant and the oil is one of toluene, p-xylene or octane. The microstructure and the dynamics of these oil/Triton X-100/water
emulsions were monitored upon varying oil type, oil concentration, emulsion age and ionic strength while maintaining the oil-to-surfactant weight ratio, temperature, energy input and emulsification method constant. For this purpose, laser scanning confocal microscopy, cryo scanning electron microscopy (cryo-SEM), pulsed field gradient NMR (PFG-NMR), macroscopic phase separation and light scattering techniques were used as experimental techniques.
The occurrence of an oil exchange between oil droplets that is not coupled to droplet growth and emulsion destabilization is reported for the three oil systems: toluene, p-xylene or octane. The mixture of two separately stained
emulsions, using green and red fluorescing dye molecules, leads to all droplets emitting yellow fluorescence under the confocal microscope within ∼10 min of mixing due to the interdroplet exchange of the two water insoluble dyes.
Furthermore, the PFG-NMR data for both toluene and p-xylene systems indicate that, for long observation times, Δ, the echo attenuation of the oil signal decays as a single exponential upon increasing the diffusion parameters. In other words the individual motions of the droplets and oil molecules are described by a unique diffusion coefficient belying the system polydispersity and indicative of a
dynamic process occurring on a time scale faster than the observation time. One way to explain this outcome is to consider a motional averaging of the oil diffusion arising from either oil permeation upon droplet collision or reversible coalescence of the droplets. These two mechanisms are supported by the extensive droplet contact observed by cryo-SEM. Such an oil transfer occurring in three distinct oil systems, independently of emulsion destabilization, has not been reported previously.
Upon decreasing the NMR observation time below a specific value, Δswitch, a switch of the echo attenuation data was detected between a single exponential and a multiexponential decay, the latter indicative of…
Advisors/Committee Members: McGrath, Kathryn.
Subjects/Keywords: Emulsions; Diffusion NMR; Light scattering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Malassagne-Bulgarelli, N. (2010). Emulsion Microstructure and Dynamics. (Doctoral Dissertation). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/1493
Chicago Manual of Style (16th Edition):
Malassagne-Bulgarelli, Nelly. “Emulsion Microstructure and Dynamics.” 2010. Doctoral Dissertation, Victoria University of Wellington. Accessed February 18, 2019.
http://hdl.handle.net/10063/1493.
MLA Handbook (7th Edition):
Malassagne-Bulgarelli, Nelly. “Emulsion Microstructure and Dynamics.” 2010. Web. 18 Feb 2019.
Vancouver:
Malassagne-Bulgarelli N. Emulsion Microstructure and Dynamics. [Internet] [Doctoral dissertation]. Victoria University of Wellington; 2010. [cited 2019 Feb 18].
Available from: http://hdl.handle.net/10063/1493.
Council of Science Editors:
Malassagne-Bulgarelli N. Emulsion Microstructure and Dynamics. [Doctoral Dissertation]. Victoria University of Wellington; 2010. Available from: http://hdl.handle.net/10063/1493
◁ [1] [2] [3] [4] [5] … [19] ▶
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