期刊
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
卷 38, 期 2, 页码 280-287出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01932691.2016.1163719
关键词
Critical micelle concentration; CTAB; gemini surfactant; mixed micelles thermodynamics; 16-6-16
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi, India [STRAIT (CSC0201), 1203]
In the present study, we have investigated the self-association, mixed micellization, and thermodynamic studies of a cationic gemini (dimeric) surfactant, hexanediyl-1,6-bis(dimethylcetylammonium bromide (16-6-16)) and a cationic conventional (monomeric) surfactant, cetyltrimethylammonium bromide (CTAB). The critical micelle concentration (CMC) of pure (16-6-16 and CTAB) and mixed (16-6-16+CTAB) surfactants was measured by electrical conductivity, dye solubilization, and surface tension measurements. The surface properties (viz., C-20 (the surfactant concentration required to reduce the surface tension by 20 mN/m), (CMC) (the surface pressure at the CMC), (max) (maximum surface excess concentration at the air/water interface), A(min) (the minimum area per surfactant molecule at the air/water interface), etc.) of micellar (16-6-16 or CTAB) and mixed micellar (16-6-16+CTAB) surfactant systems were evaluated. The thermodynamic parameters of the micellar (16-6-16 and CTAB) and mixed micellar (16-6-16+CTAB) surfactant systems were also evaluated.
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