表面活性剂双水相界面性质的研究  

Interfacial Properties of Aqueous Surfactant Two-Phase Systems

作　　者：阮科[1] 肖进新[1] 张翎[1] 赵振国[1] 张禹负[2] 

机构地区：[1]北京大学化学与分子工程学院,北京100871 [2]石油大学化工系,北京102249

出　　处：《化学学报》2002年第6期961-963,共3页Acta Chimica Sinica

基　　金：国家自然科学基金 (No.2 99730 0 2 )资助项目

摘　　要：Interfacial tensions of aqueous two-phase systems formed by mixtures of cationic and anionic surfactants were measured by the spinning drop method. The effect of the molar ratio of cationic surfactants to anionic surfactants (C +/C -) and the alkyl chain symmetry on the interfacial tensions were investigated. It was showed that values of the interfacial tensions of the aqueous two-phase systems were in the scale of ultralow interfacial tensions. Two types of γ～C +/C - curves were observed, in which DoTEAB/SDS and OTEAB/SDS systems were the typical representatives (DoTEAB, OTEAB and SDS are the abbreviations for dodecyltriethylammonium bromide, octyltriethylammonium bromide and sodium dodecylsulfate, respectively). The two types of curves were explained in terms of the change of the mixed micelles composition and symmetry of hydrophobic chains of cationic and anionic surfactants with molar ratio.Interfacial tensions of aqueous two-phase systems formed by mixtures of cationic and anionic surfactants were measured by the spinning drop method. The effect of the molar ratio of cationic surfactants to anionic surfactants (C+/C-) and the alkyl chain symmetry on the interfacial tensions were investigated. It was showed that values of the interfacial tensions of the aqueous two-phase systems were in the scale of ultralow interfacial tensions. Two types of gamma similar to C+/ C- curves were observed, in which DoTEAB/SDS and OTEAB/ SDS systems were the typical representatives ( DoTEAB, OTEAB and SDS are the abbreviations for dodecyltriethylammonium bromide, octyltriethylammonium bromide and sodium dodecylsulfate, respectively). The two types of curves were explained in terms of the change of the mixed micelles composition and symmetry of hydrophobic chains of cationic and anionic surfactants with molar ratio.

关 键 词：界面性质 负离子表面活性剂 双水相 界面张力 正离子表面活性剂 

分 类 号：O647[理学—物理化学]