Measurement of the interaction enthalpy for mixed micelles of dodecyltrimethylammonium bromide and 1-dodecyl-3- methylimidazolium bromide
- Resource Type
- Article
- Authors
- Peizhu Zheng; Handi Yin; Jihua Zhao; Weiguo Shen
- Source
- Journal of Industrial and Engineering Chemistry, 44(0), pp.204-209 Dec, 2016
- Subject
- 화학공학
- Language
- English
- ISSN
- 1876-794X
1226-086X
In order to clarify the nature of the inter-micellar interactions, we developed an approach to obtain theintermicellar interaction enthalpy through measuring the mixing heats of dodecyltrimethylammoniumbromide (DTAB)/1-dodecyl-3-methylimidazolium bromide (C12mimBr) mixed micelles by usingflow-mixing calorimetry. It was found that the inter-micellar interaction enthalpies for this system werenegative, representing the attractive enthalpy interactions between the mixed micelle droplets. Theseresults are contradictory to those reported in the literature and interpreted by the predominant attractivedehydration effect of counterion. Static light scattering experiment revealed that the repulsive nature ofthe interaction characterized by the Gibss free energy should be dominated by the entropy interaction.