SDS/CTAB/H_2O体系特异性质研究  

Study on special properties of SDS/CTAB/H_2O system

作　　者：王海波[1] 张粟[2] 王静静[3] 肖贤明[1] 滕弘霓[3] 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510640 [2]青岛科技大学化学与分子工程学院,山东青岛266042 [3]山东科技大学化学与环境工程学院,山东青岛266510

出　　处：《化学研究与应用》2007年第8期854-857,共4页Chemical Research and Application

摘　　要：对SDS/CTAB/H2O系统的三元相行为,导电能力,粘度性质等进行了相关性研究,发现相图中存在两个规则的液晶区。当SDS/CTAB(摩尔比)接近1∶2或2∶1时,其混合水溶液中表面活性剂分子异种电荷间的静电引力作用和同种电荷间的静电斥力作用达到吻合状态,既不易形成以胶束为主的均相溶液体系,也不易形成沉淀,而是形成远程有序组合体-液晶结构。当表面活性剂总浓度一定时,具有液晶结构的SDS/CTAB混合水溶液体系,致使体系的导电能力及粘度均呈现极大值。The phase behavior and electrical conductivity and viscosity of sodium dodeeyl sulfate （SDS） and eetyle trimethyle ammonium bromide （CTAB） aqueous mixture have been investigated. It was found that there were two regular regions of liquid crystal （LC） in the ternary phase diagram of SDS/CTAB/H2O system. When the molecular ratio of SDS and CTAB was approximate 1： 2 or 2： 1, the electrostatic attraction and electrostatic repulsion in the ordered composite structure formed by SDS and CTAB molecules arrived equilibrium. Neither micelle nor precipitation could be formed largely . Instead of that, however, long range ordered structure-liquid crystal was mainly formed in the system and it made the system have maximum conductivity and maximum viscosity. The mechanism was discussed in this paper.

关 键 词：正负离子表面活性剂 电导率 粘度 液晶 

分 类 号：O647.2[理学—物理化学]