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Miniemulsions via in situ Surfactant Generation

✍ Scribed by Ula El-Jaby; Michael Cunningham; Timothy F. L. McKenna

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
221 KB
Volume
211
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

The preparation and stabilisation of miniemulsions using in situ generated surfactants is described. Neutralising a water‐soluble base with an oil‐soluble long‐chain acid instantaneously generates in situ surfactants at the oil/water interface, resulting in a rapid homogenisation/polymerisation process. It was found that droplet sizes decreased with surfactant concentration and solid content and that in situ generated potassium stearate is not capable of simultaneously serving as a surfactant and costabiliser. However, the presence of stearic acid delays the rate of ripening. A number of in situ surfactants were prepared with different acids and bases. It was found that the droplet size decreased with the hydrated radius of the counterions.

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