Professor Bernard P Binks B.P.Binks@hull.ac.uk
Professor of Physical Chemistry
Professor Bernard P Binks B.P.Binks@hull.ac.uk
Professor of Physical Chemistry
Paul D. I. Fletcher
Benjamin L. Holt
Pascal Beaussoubre
Kenneth Wong
Phase inversion of fumed silica particle-stabilised emulsions of water and perfume oil can be effected in three ways. The transitional inversion from water-in-oil (w/o) to oil-in-water (o/w) occurs upon increasing the particle hydrophilicity for 9 oils of different polarity and structure. Results are compared for systems in which particles are pre-dispersed in one of the bulk phases and for those in which a novel powdered particle method is used. Using a simple theory involving the surface energies of the various interfaces, the contact angle theta of a particle with the oil-water interface is calculated as a function of the particle hydrophilicity. Assuming phase inversion occurs at theta - 90 degrees, very good agreement is obtained for all oils between the calculated and experimental particle hydrophilicity required for inversion in the case of the powdered particle method. Inversion from o/w to w/o induced by simply increasing the particle concentration is shown to be as a result of changes in the aggregation state of the particles influencing their wettability. Finally, catastrophic phase inversion from w/o to o/w is achieved by increasing the volume fraction of water, and multiple emulsions form around inversion in a system containing only one particle type. Results of the latter two inversion routes are combined to develop an emulsion compositional map allowing a variety of emulsions with different characteristics to be described by varying the relative amounts of the three components.
Binks, B. P., Fletcher, P. D. I., Holt, B. L., Beaussoubre, P., & Wong, K. (2010). Phase inversion of particle-stabilised perfume oil-water emulsions: experiment and theory. Physical chemistry chemical physics : PCCP, 12(38), 11954-11966. https://doi.org/10.1039/c0cp00558d
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 24, 2010 |
Online Publication Date | Aug 23, 2010 |
Publication Date | Oct 14, 2010 |
Journal | PHYSICAL CHEMISTRY CHEMICAL PHYSICS |
Print ISSN | 1463-9076 |
Electronic ISSN | 1463-9084 |
Publisher | Royal Society of Chemistry |
Peer Reviewed | Peer Reviewed |
Volume | 12 |
Issue | 38 |
Pages | 11954-11966 |
DOI | https://doi.org/10.1039/c0cp00558d |
Keywords | Colloidal particles; Interfacial-tension |
Public URL | https://hull-repository.worktribe.com/output/396263 |
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