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Original Articles

Mixed Micellization of Ionic and Nonionic Surfactants in Aqueous Solution

, , , &
Pages 751-759 | Received 11 Sep 2005, Accepted 18 Sep 2005, Published online: 06 Feb 2007
 

Abstract

Mixed micelles of binary surfactant mixtures consisting of nonionic/nonionic and cationic/nonionic surfactants have been prepared in different compositions of the components in aqueous solution in order to study their stability and ideality. Interfacial adsorption, minimum area per surfactant molecule at the interface, thermodynamics of micellization, and stability of mixed micelles have been investigated. The surfactant‐surfactant interaction in the mixed micelle has been determined employing regular solution theory to interpret the experimental findings. Effect of chain length of hydrophobic and hydrophilic moiety on the stability of mixed micelles has been included in the present study.

Acknowledgment

Financial assistance (No. ERIP/ER/0103338/M/01) from DRDO, India, is gratefully acknowledged. One of the authors (SC) thanks DRDO for providing a JRF.

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