The solubilization of alcohols in micellar solutions |
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Authors: | González-Pérez A Galán J J Rodríguez J R |
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Institution: | (1) Grupo de Ciencia y Tecnología de Coloides, Departamento de Física de la Materia Condensada, Universidad de Santiago de Compostela, Facultad de Física, Campus Sur s/n, 15782 Santiago de Compostela, Spain |
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Abstract: | The specific conductivities of dodecyldimethylbenzylammonium bromide (C12BBr) have been determined in aqueous butanol and
aqueous benzyl alcohol solutions in the temperature range of 5-40°C. From these data the temperature dependent critical micelle
concentration (cmc) was determined. The molar fraction of alcohol in the micelle was estimated using the theory suggested by Motomura et al. for surfactant binary mixtures. The thermal properties such as standard Gibbs free energy, enthalpy and entropy of solubilization
of alcohols in the micelles were estimated for the phase separation model. The change in heat capacity upon solubilization
of alcohol in the micelle has been estimated form the above properties.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | heat capacity enthalpy critical micelle concentration temperature dependence conductivity entropy and standard Gibbs free energy dodecyldimethylbenzylammonium bromide |
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