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A study of oil droplet coalescence

Boyson, T.K. and Pashley, R.M. (2007) A study of oil droplet coalescence. Journal of Colloid and Interface Science, 316 (1). pp. 59-65.

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Oil droplets dispersed in water can be readily studied when they are coated with surfactants, which lower their interfacial tension and enhance their stability. Pure oil droplets are more difficult to study because of their high interfacial tension, which facilitates coalescence and the adsorption of contaminants. In this study, we have characterised the surface charging properties of a water insoluble oil, bromododecane, which has a density close to water. The small density difference allows us to study relatively large drops of this oil and to analyse its coalescence behaviour. The results obtained with this simple, surfactant-free, system suggest that an additional attractive force, such as the long range hydrophobic interaction, might be required to explain oil droplet coalescence behaviour.

Item Type: Journal Article
Murdoch Affiliation(s): School of Engineering and Energy
Publisher: Academic Press
Copyright: © 2007 Elsevier Inc.
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