物理化学学报 >> 1999, Vol. 15 >> Issue (02): 110-115.doi: 10.3866/PKU.WHXB19990204

研究论文 上一篇    下一篇

脂肪酸盐-烷基吡啶盐混合体系的双水相

朱王步瑶, 张镤, 黄建滨, 赵国玺   

  1. 北京大学化学学院,北京 100871
  • 收稿日期:1998-05-20 修回日期:1998-06-12 发布日期:1999-02-15
  • 通讯作者: 朱王步瑶

An Investigation on the Aqueous Surfactant Two Phase in Mixed Carboxylate-Alkyl Pyrridinium Salt Systems

Zhu Bu-Yao, Zhang Pu, Huang Jian-Bin, Zhao Guo-Xi   

  1. Chemistry Department,Peking University,Beijing 100871
  • Received:1998-05-20 Revised:1998-06-12 Published:1999-02-15
  • Contact: Zhu Bu-Yao

摘要:

研究了脂肪酸盐和烷基吡啶盐混合水溶液中双水相的形成规律和性质.考察了形成双水相的组成范围和烷基碳链长的影响. 测定了两相的密度及化学组成.应用电子显微镜观察了两相的微观结构.结果表明,两相均存在囊泡结构.两相含水均在95%以上.上相为表面活性剂富集的囊泡絮凝相,浓度远远大于下相,相差均在二十倍以上.下相为含有分散的囊泡的表面活性剂稀溶液.

关键词: 表面活性剂双水相, 囊泡, 混合阴、阳离子表面活性剂, 羟酸盐, 烷基吡啶盐

Abstract:

The Phenomenon of two diluite aqueous phases coexisting in mixed aqueous solutions of carboxylates and alkyl pyrridmmin salts were investigated This phenomenon occurs in limit range of composition of system: limited carbon nuuber in hydrophobic groups of surfactants: limited miolar ratio of cationic and anionic surfactants; and limited concentration of surfactants. The coexistent two phases contain large amount of water , more than 95% in-both The upper phases are richer in surfactants being more than twenty fold of the concentration in lower phase Vesicular structure exists in upper and lower Phases, which are aggregated in upper phases and dispersed in the lower. The molecular ratio of cationics and maniocs is more close to 1 in upper phase than that in lower phase. The concentration of inorganic ions is almost the same in both phases.

Key words: Aqueous surfactant two phase, Vesicles, Mixed cationic-anionic system, Carboxylates, Alkyl pyrridinium aslts