文献类型：期刊文献

英文题名：Aqueous two-phase system (ATPS) containing gemini (12-3-12,2Br-) and SDS I: Phase diagram and properties of ATPS

作者：Shang, Yazhuo[1]; Liu, Honglai[1]; Hu, Ying[1]; Prausnitz, John M.[2]

机构：[1] Department of Chemistry, Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai 200237, China; [2] Department of Chemical Engineering, University of California, Berkeley, Chemical Sciences Division, Berkeley, CA, United States

年份：2006

卷号：27

期号：3

起止页码：335

外文期刊名：Journal of Dispersion Science and Technology

收录：EI(收录号：2006119761325)

语种：英文

外文关键词：Optical properties - Phase composition - Phase diagrams - Phase separation - Surface active agents

摘要：Two phases coexist in an aqueous system that contains the two surfactants cationic gemini 12-3-12,2Br- and anionic SDS. An aqueous two-phase system (ATPS) is formed in a narrow region of the ternary phase diagram different from that of traditional aqueous cationic-anionic surfactant systems. In that region, the molar ratio of gemini to SDS varies with the total concentration of surfactants. ATPS not only has higher stability but also has longer phase separation time for the new systems than that of the traditional system. Furthermore, the optical properties of ATPS are different at different total concentrations. All of these experimental observations can be attributed to the unique properties of gemini surfactant and the synergy between the cationic gemini surfactant and the anionic surfactant SDS. Copyright ? Taylor & Francis Group, LLC.