物理化学学报 >> 2010, Vol. 26 >> Issue (08): 2200-2204.doi: 10.3866/PKU.WHXB20100643

胶体及界面化学 上一篇    下一篇

Gemini表面活性剂烷烃尾链在吸附和聚集过程中的疏水协同效应

游毅, 邓永淑, 李二军, 裴晓梅, 赵剑曦   

  1. 福州大学化学化工学院, 胶体与界面化学研究所, 福州 350108
  • 收稿日期:2010-01-13 修回日期:2010-03-23 发布日期:2010-07-23
  • 通讯作者: 赵剑曦 E-mail:jxzhao.colloid@fzu.edu.cn
  • 基金资助:

     国家自然科学基金(20673021, 20873024)和福州大学教授基金(2008-XY-5)资助项目

Hydrophobic Synergism between the Alkyl Tails of Gemini Surfactants during Adsorption and Aggregation

YOU Yi, DENG Yong-Shu, LI Er-Jun, PEI Xiao-Mei, ZHAO Jian-Xi   

  1. Institute of Colloid and Interface Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, P. R. China
  • Received:2010-01-13 Revised:2010-03-23 Published:2010-07-23
  • Contact: ZHAO Jian-Xi E-mail:jxzhao.colloid@fzu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20673021, 20873024) and Professor Foundation of Fuzhou University, China (2008-XY-5).

摘要:

以表面张力法测定了系列Gemini表面活性剂m-6-m以及对应单体表面活性剂CmTABr的临界胶束浓度(cmc)和降低水表面张力20 mN·m-1需要的浓度(pC20). 比较这些参数表明m-6-m胶束化和在界面吸附的能力均强于CmTABr, 这被归结为Gemini表面活性剂烷烃尾链间的疏水协同效应. 与不对称Gemini表面活性剂12-6-m比较, 对称的Gemini结构更有利于表面活性剂的聚集和吸附.

关键词: Gemini表面活性剂, 六亚甲基联接链, 烷烃尾链疏水协同效应, 表面张力

Abstract:

The critical micelle concentration (cmc) and the concentration reducing 20 mN·m-1 of water surface tension (pC20) by the Gemini surfactant series (m-6-m) and the corresponding monomers (CmTABr) were determined using surface tension measurements. Comparison between the active parameters indicates that the Gemini surfactants have a stronger micellization and adsorption ability than CmTABr, which is attributed to the hydrophobic synergism between the alkyl tails of the Gemini surfactants. The effects of dissymmetry in the Gemini surfactants (12-6-m) on the micellization and adsorption were also discussed. The results showed that the Gemini surfactant with a symmetric structure is more effective in association and adsorption than that with a dissymmetric structure.

Key words: Gemini surfactant, Hexamethylene spacer, Hydrophobic synergism between alkyl tails, Surface tension

MSC2000: 

  • O648