화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.44, 204-209, December, 2016
DOI10.1016/j.jiec.2016.09.001  Export Citation
Measurement of the interaction enthalpy for mixed micelles of dodecyltrimethylammonium bromide and 1-dodecyl-3- methylimidazolium bromide
Peizhu Zheng1, Handi Yin1, Jihua Zhao1, and Weiguo Shen1, 2, †
  • 1Department of Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
  • 2School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
E-mail:
In order to clarify the nature of the inter-micellar interactions, we developed an approach to obtain the intermicellar interaction enthalpy through measuring the mixing heats of dodecyltrimethylammonium bromide (DTAB)/1-dodecyl-3-methylimidazolium bromide (C12mimBr) mixed micelles by using flow-mixing calorimetry. It was found that the inter-micellar interaction enthalpies for this system were negative, representing the attractive enthalpy interactions between the mixed micelle droplets. These results are contradictory to those reported in the literature and interpreted by the predominant attractive dehydration effect of counterion. Static light scattering experiment revealed that the repulsive nature of the interaction characterized by the Gibss free energy should be dominated by the entropy interaction.
Keywords:Mixed surfactants;Inter-micellar interactions;Interaction enthalpy;Flow-mixing calorimetry;Static light scattering
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