Journal
JOURNAL OF SURFACTANTS AND DETERGENTS
Volume 16, Issue 5, Pages 723-731Publisher
WILEY
DOI: 10.1007/s11743-013-1477-x
Keywords
Gemini surfactants; Conventional surfactant; Mixed micelles; Interaction parameter; Mixed adsorption energy
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The interfacial and micellization behaviors of binary mixtures of two gemini cationic surfactants and conventional the cetyl trimethyl ammonium bromide surfactant were studied at various molar ratios. From the equilibrium surface tension measurements, the critical micelle concentrations (CMC) data were obtained as functions of the composition. Values of the CMC were analyzed according to the regular solution model developed by Rubingh for mixed micelles. Two interaction parameters were obtained for each system, the interaction at the interface, and in the micellar phase. The results showed that micellization and adsorption properties of the studied mixed systems depend on the spacer chain lengths of the gemini surfactants and their ratio in the mixed systems.
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