中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (1): 46-49.

• 研究论文 • 上一篇    下一篇

长链烷氧甲基冠醚的表面活性研究

余孝其, 蓝仲薇, 赵华明   

  1. 四川大学化学系 成都 610064
  • 收稿日期:1993-03-02 修回日期:1993-06-29 出版日期:1994-02-10 发布日期:1994-02-10

Surface Active Properties of Long Chain Alkoxymethyl Substituted Crown Ethers

Yu Xiaoqi, Lan Zhongwei, Zhao Huaming   

  1. Department of Chemislry, Sichuan University, Chengdu 610064
  • Received:1993-03-02 Revised:1993-06-29 Published:1994-02-10 Online:1994-02-10

PDF

503

被引次数

1

摘要： 用表面张力测定法研究了长链烷氧甲基取代三甘醇及长链烷氧甲基取代冠醚的表面活性。结果表明,当侧链碳原子数大于8的双亲分子,在水溶液中一般均可形成胶束,而且随着碳原子数的增加,双亲分子在水溶液中的临界胶束浓度(CMC)值减小,且每增加两个碳原子,其CMC值减小约10倍。在每一温度下,同系物CMC的对数值与疏水链碳原子数之间呈线性关系,求出了回归方程。探讨了NaCl对上述两种化合物表面活性的影响。

关键词: 长链烷氧甲基冠醚, 表面活性

Abstract: The surface active properties of aqueous solution of the long chain alkoxymethyl crown ethers and corresponding open chain compounds alkoxymethyl oligoethylene glycols, have been investigated by surface tension measurement. The results show that compounds 1 and 2, where the number of carbon atoms in the side chain (n) exceeds 8,can form micelles in aqueous solution, and their CMC values decrease with the increase of n. Correlation of the log(CMC)values of a homologous series of surface active agents for the same temperatare with n gives a satisfactory linear relationship with the correlation coeffecients generally being greater than 0. 99. The effects of NaCl on the surface properties of the long chain alkoxymethyl substituted oligoethylene glycols and corresponding crown ether compounds also have been investigated.

Key words: long chain alkoxymethyl substituted crown ether, surface active property

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