Solubilization of water in non-polar solvents by cationic detergents

Palit, Santi R. ; Venkateswarlu, V. (1951) Solubilization of water in non-polar solvents by cationic detergents Proceedings of the Royal Society of London Series A: Mathematical, Physical & Engineering Sciences, 208 (1095). pp. 542-551. ISSN 1364-5021

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Solubilization of water in common organic solvents by fatty acid salts of long-chain (C12-C18) aliphatic primary amines was studied. It was found that, of all the salts from formate to palmitate and oleate, dodecylamine-n-butyrate and octadecylamine propionate solubilize most in xylene, the figure reaching about 29 molecules of H2O/mole of soap. Additions of free amine enhanced solubilization, while free butyric acid decreased the intake. Our viscosity and freezing-point measurements of the same systems indicated that the additive is most likely to form a complex with soap micelles, and that their solubilizing power is modified thereby. Freezing-point measurements of detergent solutions with and without the solubilized phase showed, surprisingly enough, that the dissolved water elevates the freezing-points considerably, showing that solubilized water acts as a binding agent between micelles and probably promotes micelle formation. The results are discussed and correlated on Winsor's theory of solubilization.

Item Type:Article
Source:Copyright of this article belongs to The Royal Society.
ID Code:34245
Deposited On:29 Mar 2011 12:52
Last Modified:29 Mar 2011 12:52

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