Thermodynamic Study on the Micellar Properties of DBS/Brij 30 Mixed Surfactant Systems

Journal of the Korean Chemical Society

Byung-Hwan Lee¹  In-Jung Park¹ 

关键词: Mixed Surfactant System;    DBS;    Brij 30;    Critical Micelle Concentration;    Counter Ion Binding Constant;    Iso-Structural Temperature;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The critical micelle concentrations (CMC) and the counter ion binding constants (B) in a micellar state of the mixed surfactant systems of sodium dodecylbenzenesulfonate (DBS) with polyoxyethylene(4) lauryl ether (Brij 30) in water were determined as a function of ¥á1 (the overall mole fraction of DBS) by the use of electric conductivity method and surface tensiometer method from 288 K to 308 K. Various thermodynamic parameters (¥ÄSmo, ¥ÄHmo, and ¥ÄGmo) for the micellization of DBS/Brij 30 mixtures were calculated and analyzed from the temperature dependence of CMC values. The measured values of ¥ÄGom are all negative but the values of ¥ÄSmo are positive in the whole measured temperature region. On the other hand, the values of ¥ÄHmo are positive or negative, depending on the measured temperature and ¥á1.

【 授权许可】

Unknown