Effect of monovalent anions on cationic Gemini micro-emulsion

作     者：Yinglu Gu Shuang Chen Hui'e Liu Yubin Wang Pingping Zhou 

作者机构：State Key Laboratory of Heavy Oil Processing China University of Petroleum(East China)Qingdao 266580China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2018年第26卷第12期

页      面：2636-2640页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 

基　　金：Supported by China Petroleum Science and Technology Innovation Fund(2017D-5007-0601) State Key Laboratory of Heavy Oil Processing and China University of Petroleum(East China)2018 Graduate Engineering Innovation Project Found(SLKZZ-2017002) 

主　　题：Gemini surfactant Monovalent anions Micro-emulsion Phase behavior Solubilization 

摘      要：Micro-emulsion usually consists of water, oil, surfactants and co-surfactants, and each component has an effect on the phase behavior and solubilization of the micro-emulsion. When the surfactant in the micro-emulsion system is quaternary ammonium cationic Gemini surfactant, the surfactant mainly combines with the anions in the salt. With the increase of salt concentration, the phase transformation of Winsor I → Winsor III → Winsor II occurred, but the optimum salinity and salt width are different because of the type of salt. The effects of 5 different kinds of monovalent anions, including C_6H_5SO_3^-, I-, Br-, NO_3^- and Cl-, on the phase behavior and solubilization of quaternary ammonium cationic Gemini micro-emulsion are researched by Winsor phase diagram. It is found that the effects of organic anions C_6H_5SO_3-and I-on the phase behavior and solubilization of quaternary ammonium cationic Gemini micro-emulsion are most significant, and the effects of Br-, NO_3^- and Cl-are less significant. Meanwhile, when the optimum solubilization is achieved, the amount of sodium benzoate is the least, indicating that the organic anion has stronger self-organization behavior with quaternary ammonium cationic Gemini surfactants.