物理化学学报 >> 2003, Vol. 19 >> Issue (06): 557-559.doi: 10.3866/PKU.WHXB20030616

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C12-s-C12•2Br和己醇混合水溶液的胶团化行为

赵剑曦;朱永平;游毅;蔡伟荣   

  1. 福州大学化学化工学院,福州　350002
  • 收稿日期:2002-09-02 修回日期:2002-12-07 发布日期:2003-06-15
  • 通讯作者: 赵剑曦 E-mail:jxzhao.colloid@fzu.edu.cn

Mixed Micellization of C12-s-C12•2Br and n-Hexanol in Aqueous Solution

Zhao Jian-Xi;Zhu Yong-Ping;You Yi;Cai Wei-Rong   

  1. College of Chemistry and Chemical Engineering,Fuzhou University,Fuzhou,350002
  • Received:2002-09-02 Revised:2002-12-07 Published:2003-06-15
  • Contact: Zhao Jian-Xi E-mail:jxzhao.colloid@fzu.edu.cn

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摘要： 己醇的加入使C12-s-C12•2Br（s=3,4,6）的临界胶团浓度cmc降低,s越大其影响也越显著.己醇参与组成了混合胶团,当添加的己醇量相同时,它在混合胶团中的摩尔分数几乎一样.混合胶团表面反离子解离度随己醇浓度增大而增大.

关键词: 季铵盐二聚表面活性剂, 己醇影响, 胶团化

Abstract: The effects of n-hexanol on the micellization of quaternary ammonium dimeric surfactants (C12-s-C12•2Br,s=3,4,6) have been examined using conductivity and steady fluorescence measurements.The results showed that the critical micelle concentration cmc decreases with the addition of n-hexanol.The larger s,the stronger the effect.The dimeric surfactant and n-hexanol form the mixed micelles with the alkyl chains of n-hexanol molecules penetrating into the micelle interior and with hydroxyl groups lie in the palisade layer of the micelle.At the same concentration of n-hexanol in aqueous solution,the molar fraction of n-hexanol in the mixed micelle is almost the same for different s.The ionization degree of the mixed micelle increases with increasing n-hexanol concentration.

Key words: Quaternary-ammonium dimeric surfactants, n-hexanol effects, 　Micellization