Acta Scientiarum Naturalium Universitatis Pekinensis

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Stability of Vesicle from Catanionic Surfactants in Aqueous Solution

HUANG Jianbin, ZHAO Guoxi, ZHU Buyao   

  1. Institute of Physical Chemistry, Peking University, Beijing, 100871
  • Received:1997-08-05 Online:1999-03-20 Published:1999-03-20



  1. 北京大学物理化学研究所,北京,100871

Abstract: The stability of vesicles formed by catanionic surfactants in aqueous solution has been investigated systematically. The vesicles are stable for weeks and maintain their stability in a rather large temperature variation. Even with an addition of inorganic salt in large amount, the catanionic surfactants still show the superior vesicle forming ability. However, the vesicles can be destroyed by adding small amounts of CaBr2 or surfactants such as SDS or TritonX-100.

Key words: Catanionic surfactant, vesicle, molecular organized assembly, vesicle-stability

摘要: 水环境中直链烷基羧酸盐与溴代烷基季铵盐1∶1混合表面活性剂囊泡可在一定时间和较大温度范围内稳定存在。1-1价型无机盐对混合囊泡稳定性影响较小。但少量高价金属离子与离子、非离子表面活性剂的介入对混合体系形成的囊泡具有较为明显的破坏作用。

关键词: 正负离子表面活性剂, 囊泡, 分子有序组合体, 囊泡稳定性

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