dspaceThe Cape Peninsula University of Technology (CPUT) Electronic Theses and Dissertations (ETD) repository holds full-text theses and dissertations submitted for higher degrees at the University (including submissions from former Cape Technikon and Peninsula Technikon).

Show simple item record

dc.contributor.advisorMasalova, IrinaEN
dc.contributor.advisorMalkin, Alexander YaEN
dc.contributor.authorFoudazi, Reza
dc.date.accessioned2016-08-22T06:34:42Z
dc.date.accessioned2016-09-09T06:20:43Z
dc.date.available2016-08-22T06:34:42Z
dc.date.available2016-09-09T06:20:43Z
dc.date.issued2009
dc.identifier.urihttp://hdl.handle.net/20.500.11838/2152
dc.descriptionThesis (DTech (Chemical Engineering))--Cape Peninsula University of Technology, 2009.en_US
dc.description.abstractHighly 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.en_US
dc.language.isoenen_US
dc.publisherCape Peninsula University of Technologyen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/za/en
dc.subjectEmulsionsen_US
dc.subjectRheologyen_US
dc.titleModels for structure-rheology of highly concentrated emulsionsen_US
dc.typeThesisen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

http://creativecommons.org/licenses/by-nc-sa/3.0/za/
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-sa/3.0/za/