Abstract
The process of emulsion breakdown is complex and may involve several stages. For example, emulsion droplets stabilised with ionic surfactants can undergo flocculation (aggregation in the secondary minimum), coagulation (aggregation in the primary minimum) and finally rupture of the thin film separating the droplets (coalescence), whereas emulsions stabilised with polymers and nonionic surfactants will undergo flocculation and coalescence. Most of the work on non-ionic surfactants as stabilisers has involved polyoxyethylene glycol derivatives and similar surfactants (1). However studies on thin liquid films have shown that Newton-black (primary minimum) films (2) can be very stable and implies that emulsions stabilised with simple, low-molecular weight non-ionic surfactants might have appreciable stability to coalescence. The first part of this paper deals with an investigation into the breakdown of emulsions stabilised by a simple non-ionic surfactant, decyldimethylphosphine oxide. The effect of electrolytes is also considered.
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Buscall, R. (1978). The properties of O/W emulsions stabilised with a non-ionic surfactant and surfactant-polymer mixtures. In: Emulsions. Progress in Colloid and Polymer Science, vol 63. Steinkopff, Heidelberg. https://doi.org/10.1007/BFb0117148
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DOI: https://doi.org/10.1007/BFb0117148
Publisher Name: Steinkopff, Heidelberg
Print ISBN: 978-3-662-16093-0
Online ISBN: 978-3-7985-1805-6
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