文献类型：期刊文献

中文题名：偶联表面活性剂与传统表面活性剂混合溶液的双水相

英文题名：Aqueous Two-phase System in the Mixed Solution of Gemini Surfactant and Traditional Surfactant

作者：尚亚卓[1];陈启斌[1];韦园红[1];刘洪来[1];胡英[1]

机构：[1]华东理工大学化学系国家重点化学工程联合实验室,上海200237

年份：2003

卷号：29

期号：2

起止页码：206

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金(20025618;20236010);教育部青年骨干教师基金;上海市教委资助项目

语种：中文

中文关键词：偶联正离子表面活性剂;负离子表面活性剂;双水相;液晶;微观结构;混合溶液;表观现象

外文关键词：gemini cationic surfactant, anionic surfactant, aqueous two-phase system (ATPS); liquid crystal; microstructure

摘要：研究了偶联表面活性剂(Geminis,12-3-12,2Br)和传统表面活性剂(SDS)混合体系双水相的性质。结果表明:该系统在很低的总浓度下(0.03mol/L)能够形成双水相。双水相的区域非常狭窄,且分相溶液中正负离子表面活性剂的比值随着表面活性剂总浓度的变化而线性改变。双水相的表观现象也因表面活性剂总浓度的不同而异。采用冷冻蚀刻技术、负染色技术及透射电子显微镜观察得到的结果表明,双水相中两相的微观结构明显不同,胶团和囊泡可以共存。偏光显微照片显示该系统有独特的液晶结构。
The phenomenon of two dilute aqueous phases coexisting in mixed gemini surfactant (12312,2B) and traditional surfactant (anionic surfactant SDS) was investigated. It was shown that the aqueous twophase system (ATPS) can be formed with a low total concentration of surfactants (0.03mol/L) and the range under which ATPS was formed is very narrow. The molar ratio of gemini cationic surfactant to anionic surfactant varies with the total concentration of surfactants in this system. The appearance of ATPS is different obviously at different total concentration of surfactants. The results by freeze etching technology, negative staining technique and transition electron microscope show that the microstructures of the two phases are completely different in ATPS. The fact that micelles and vesicles coexist in a single phase can be found too. The photography of polarmicroscope demonstrates that the microstructure of liquid crystal in this system is very unique.