Influences of molecular structure of the cationic surfactant, additives and medium on the micellization of cationic/anionic surfactant mixed systems
Influences of molecular structure of the cationic surfactant, additives and medium on the micellization of cationic/anionic surfactant mixed systems
复制标题
阳离子表面活性剂、助剂和介质的分子结构对阴/阳离子表面活性剂混合体系胶束化的影响
DOI：
10.1016/j.colsurfa.2016.09.054
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发表时间：
2016-12-20
影响因子：
5.2
通讯作者：
Nan, Yan-Qing
中科院分区：
文献类型：
--
作者：
Hao, Li-Sheng;Jia, Yun-Feng;Nan, Yan-Qing
研究了4种不同分子结构的溴化季铵盐表面活性剂与十二烷基磺酸钠（Na+AS）在318.15K下形成的混合胶束化。用解离的Margules模型来模拟非理想混合胶束化。双子型溴化季铵（12-3-122+.2Br-）与Na+AS水溶液混合体系表现出最强的协同作用。研究了在318.15K下，表面活性剂反离子组成的外加盐对双子季铵盐表面活性剂与不同反离子的十二烷基磺酸钠在水溶液中混合胶团化的影响。当双子表面活性剂过量时，比表面活性剂效应变得不显著。当十二烷基磺酸钠过量时，K+的反离子效应强于Na+。还探索了1-丙醇对12-3-122+.2Br/Na+AS/H2O体系在318.15K下的混合胶束化的影响。与单一离子表面活性剂的非单调行为不同，在正丙醇-水混合介质中，混合体系的临界胶束浓度（cmc）随正丙醇添加浓度的增加而增加。(C)2016爱思唯尔B. V.保留所有权利。
The mixed micellization of four cationic/anionic surfactant aqueous systems formed by quaternary ammonium bromide surfactants with different molecular structures and sodium dodecylsulfonate (Na+AS) at 318.15 K have been investigated. The dissociated Margules model has been used to model the nonideal mixed micellization. The gemini quaternary ammonium bromide (12-3-122+.2Br-) and Na+AS aqueous mixed system shows the strongest synergism. The effect of added salt constituted by surfactant counterions on the mixed micellization of the gemini quaternary ammonium surfactant and alkali dodecylsulfonate with various counterions in aqueous solution at 318.15 K has been explored. When gemini surfactant is in excess, the specific counterion effect becomes insignificant. Whereas, when alkali dodecylsulfonate is in excess, the counterion effect of K+ is stronger than that of Na+. The effect of 1-propanol on the mixed micellization of the 12-3-122+.2Br/Na+AS/H2O system at 318.15 K has also been explored. Different from the nonmonotonic behavior of the single ionic surfactants, the critical micelle concentration (cmc) of the mixed systems increases with the increase of the concentration of added 1-propanol in the 1-propanol water mixed medium. (C) 2016 Elsevier B.V. All rights reserved.