物理化学学报 >> 2006, Vol. 22 >> Issue (04): 414-418.doi: 10.3866/PKU.WHXB20060405

研究论文 上一篇    下一篇

酯基Gemini型季铵盐表面活性剂与SDS的相互作用

许虎君;王中才;刘晓亚;吕春绪   

  1. 江南大学化工学院, 江苏 无锡 214036; 南京理工大学化工学院, 南京 210094
  • 收稿日期:2005-09-05 修回日期:2005-11-20 发布日期:2006-04-10
  • 通讯作者: 许虎君 E-mail:xu6209@163.com

The Interaction of Esterquat Gemini Surfactant with SDS

XU Hu-Jun;WANG Zhong-Cai;LIU Xiao-Ya;LÜ Chun-Xu   

  1. School of Chemical Engineering, Southern Yangtze University, Wuxi 214036, P. R. China; School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
  • Received:2005-09-05 Revised:2005-11-20 Published:2006-04-10
  • Contact: XU, Hu-Jun E-mail:xu6209@163.com

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摘要： 研究了酯基Gemini型季铵盐表面活性剂[Cm-1H2m-1COOCH2CH2(CH3)2N+(CH2)n+N(CH3)2CH2CH2OOCCm-1H2m-1]•2Br-(简称II-m-n, m=10, 12; n=3, 4, 6)与十二烷基硫酸钠(SDS)的复配体系的相互作用以及无机盐(NaBr)对复配体系表面活性的影响. 结果发现, 其复配体系具有显著的胶团化协同增效作用和降低表面张力的增效作用, 并且II-10-n与SDS的复配体系的增效作用具有等链长效应. II-m-n/SDS复配体系的胶团化协同增效作用随n增大而增强. 混合胶团中II-m-n与SDS的摩尔比均近似为1:1, 显示各复配体系的混合胶团均带电性, 因此NaBr的加入能增强复配体系的表面活性和促进混合胶团的形成.

关键词: 酯基Gemini型季铵盐表面活性剂, 十二烷基硫酸钠, 复配体系, 混合胶团

Abstract: The interactions of a series of novel cleavable esterquat Gemini surfactants, Cm-1H2m-1COOCH2CH2(CH3)2N+(CH2)n+N(CH3)2CH2CH2OOCCm-1H2m-1]•2Br-(symbolized II-m-n, m=10, 12; n=3, 4, 6), with sodium dodecyl sulphate (SDS) in aqueous solution have been investigated. The experimental results suggested that both II-10-n and II-12-n had evident synergism with SDS in mixed micelle formation and surface tension reduction in binary system. II-10-n manifested stronger synergistic interaction with SDS than II-12-n, which was attributed to the equal-chain length effect. The synergism in mixed micelle formation of II-m-n/SDS was found to become more intense increasingly with the increase of n. The equilibrium constant proof illustrated that the ratio of II-m-n to SDS existed in mixed micelles was approximately 1:1, which indicated that the mixed micelle was charged. Therefore the addition of NaBr could improve the surface activity of II-m-n/SDS mixtures and promote the formation of mixed micelles.

Key words: Esterquat Gemini surfactant, Sodium dodecyl sulphate, Mixed system, Mixed micelle