期刊
JOURNAL OF CHEMICAL THERMODYNAMICS
卷 113, 期 -, 页码 394-398出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2016.10.039
关键词
Mixed surfactants; Micellization; Margules equation; Thermodynamic properties; Excess properties
资金
- National Natural Science Foundation of China [21173080, 21373085, 21403098]
- Natural Science Foundation of Gansu Province [1506RJYA237]
The mixed surfactants of dodecyltrimethylammonium bromide (DTAB) and 1-dodecyl-3-methylimidazolium bromide (C(12)mimBr) in aqueous solutions were studied by measurement of electrical conductivity and isothermal titration microcalorimetry (ITC). The critical micelle concentrations (cmc) and the degree of dissociations of counter ions were determined for this system at various surfactant compositions, and the thermodynamic properties of micellization were evaluated. A one-parameter Margules equation was used to fit the cmc values to calculate the mole fraction, the activity coefficients of two surfactant components and the excess properties in mixed micelles. (C) 2016 Elsevier Ltd.
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