物理化学学报 >> 2001, Vol. 17 >> Issue (11): 1027 -1030 .doi: 10.3866/PKU.WHXB20011113

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DTAB-月桂酸钠体系表面活性剂双水相研究

巩育军;朱瑶;赵国玺   

  1. 北京大学物理化学研究所,北京 100871; 茂名学院石化系,茂名 525000
  • 收稿日期:2001-03-07 修回日期:2001-05-12 发布日期:2001-11-15
  • 通讯作者: 巩育军 E-mail:gongyujun@yeak.net

Study on the Aguous Surfactant TwoPhase of Dodecyltrimethylammonium Bromide(DTAB)Sodium Laurate(SL) Mixed System

Gong Yu-Jun;Zhu Bu-Yao;Zhao Guo-Xi   

  1. Institute of Physical Chemistry, Peking University, Beijing 100871;Department of Petrochemical Engineering, Maoming College, Maoming 525000
  • Received:2001-03-07 Revised:2001-05-12 Published:2001-11-15
  • Contact: Gong Yu-Jun E-mail:gongyujun@yeak.net

摘要: 绘制和分析了十二烷基三甲基溴化铵(DTAB)月桂酸钠(SL)组成的表面活性剂混合体系相图,系统研究了温度和无机盐等因素对该体系表面活性剂双水相 (ASTP) 影响的规律性.结果表明:与富含负离子表面活性剂双水相 (ASTPA) 相比较,富含正离子表面活性剂双水相(ASTPC)区域更大、更稳定;温度升高,无机盐(NaBr)的浓度增大,都引起 ASTP 体系上相体积的减小和下相体积的增加;囊泡普遍存在于ASTP的上下相之中.

关键词: 表面活性剂双水相, 囊泡, 上下相体积比, 温度, 无机盐

Abstract: The phase behavior diagram has been drawn and analysed in DTAB-SL mixed system and the influences of temperature and inorganic salt upon “aqueous surfactant twophase(ASTP)” have been studied systematically. The results show that ASTP region when cationics is in excess(ASTPC) is larger and stabler than that when anionics is in excess (ASTPA)(to see Fig.1). The higher the temperature and the inorganic salt concentration(NaBr), the less ratio of upper to lower volume( Vup/Vlow) in ASTP system(to see Table 1~2). Vesicles generally existed in upper and lower phases of ASTP.

Key words: Aqueous surfactant twophase(ASTP), Vesicle, Ratio of upper to lower volume, Temperature, Inorganic salt