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化学学报
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化学学报 ›› 1992, Vol. 50 ›› Issue (11): 1041-1045.    下一篇

研究论文

氧杂氟表面活性剂及其与同电性碳氢表面活性剂混合溶液的表面吸附和胶团形成

张兰辉;朱步瑶;赵国玺   

  1. 北京大学物理化学研究所
  • 发布日期:1992-11-15

The surface adsorption and micelle formation of the solutions of oxafluorocarbon surfactants and their mixtures with hydrocarbon surfactant

ZHANG LANHUI;ZHU BUYAO;ZHAO GUOXI   

  • Published:1992-11-15

PDF

448

被引次数

4

研究了四种氧杂氟表面活性及其与同电性直链碳氢表面活性剂混合体系的表面活性;考察了混合体系中的表面吸附和胶团形成现象.在吸附层中分子间有明显的互疏作用,在溶液中倾向于各自形成胶团.还讨论了反离子结合度不同对理想混合胶团的组成CMC的计算的影响,提出了一般的计算式,实验测得这些氧杂氟表面活性剂有较低的胶团反离子结合度.

关键词: 表面活性剂, 表面吸附, 混合液, 碳氢化合物, 胶团, 氧杂氟化合物

Surface activity, surface adsorption, and micelle formation were studied for 4 oxafluorocarbon surfactants (C3H7OCF(CF3)CF2OCF(CF3)COOH (C9FOH), C9FONa, (C2F5)C(CF3)C(CF3):C(CF3)OC6H4SO3Na, C2F5(OCF2CF(CF3))2OC2F4SO3Na) and their mixtures with SDS or Na cetyl sulfate. There is a remarkable mutual phobic interaction between 2 surfactants in the mixed adsorption layer even though both surfactants tend to form sep. micelles in mixed aqueous solns. General equations are presented for calculation of cmc and mixed micelle or adsorption layer compns. Experimental studies showed that counterion binding to micelles is less for oxafluorocarbon than for hydrocarbon surfactants.

Key words: SURFACTANTS, SURFACES ADSORPTION, MIXED SOLTION, HYDROCARBAN

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