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Changing the size of oil droplets dispersed in water without added surfactants
Journal article   Peer reviewed

Changing the size of oil droplets dispersed in water without added surfactants

M.J. Francis, T.K. Boyson and R.M. Pashley
Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol.316(1-3), pp.136-141
2008
DOI: https://doi.org/10.1016/j.colsurfa.2007.08.044
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Abstract

Electrophoresis studies on pure hydrocarbon oil droplets, dispersed in water, have established that a significant charge is naturally developed on the droplets surface due to the spontaneous adsorption of hydroxyl ions. It has subsequently been pointed out that this charge should ensure the meta-stability of fine, micron-sized oil droplets dispersed in water. Further studies have demonstrated that such dispersions can be produced by the vigorous shaking of de-gassed mixtures of oil and water. De-gassing appears to enhance the dispersion process and the natural charging of the oildroplets ensures their meta-stability. Using this enhanced dispersion process, we have found that subsequent heating and cooling cycles, carried out over several minutes, can alter the average droplet size and the droplet size distribution, in some cases producing narrower distributions.

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Collaboration types
Domestic collaboration
Citation topics
2 Chemistry
2.167 Microelectromechanical Systems
2.167.555 Atomic Force Microscopy
Web Of Science research areas
Chemistry, Physical
ESI research areas
Chemistry
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