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The effects of salts and surfactants on the physical stability of lamellar liquid-crystalline systems

✍ Scribed by J.C. van de Pas; C.J. Buytenhek; L.F. Brouwn

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
599 KB
Volume
113
Category
Article
ISSN
0165-0513

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✦ Synopsis

Abstract

The effects of the salting‐out effectiveness of electrolytes and of the salting‐out resistance of surfactants on the physical stability of lamellar phase systems, consisting of sodium dodecylbenzenesulphonate, a co‐surfactant, an electrolyte and water, have been investigated. A correlation was found between (i) the electrolyte concentration necessary to induce salting‐out/phase separation of a micellar solution of the co‐surfactant and (ii) the maximum electrolyte concentration which can be incorporated into a lamellar phase system formed from the co‐surfactant before physical instability is observed. High concentrations of salting‐out electrolyte can be added to lamellar phase systems before instability is observed, when the co‐surfactant has a high resistance against salting‐out effects.

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