高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (2): 401.doi: 10.7503/cjcu20120265

• 物理化学 • 上一篇    下一篇

新型Gemini咪唑表面活性剂的合成及表面性能

刘海燕1,2, 顾大明1, 刘国宇1, 赵秀丽2, 陈成2, 徐克明2   

  1. 1. 哈尔滨工业大学化学系, 哈尔滨 150001;
    2. 大庆师范学院化学化工学院, 大庆 163712
  • 收稿日期:2012-03-23 出版日期:2013-02-10 发布日期:2013-01-21
  • 通讯作者: 顾大明,男,博士,教授,博士生导师,主要从事油田化学方面的研究.E-mail:gudaming@163.com E-mail:gudaming@163.com
  • 基金资助:

    黑龙江省自然科学基金(批准号: QC08C33)和黑龙江省教育厅科学技术研究项目(批准号: 11553010)资助.

Synthesis and Surface Properties of Novel Gemini Imidazolium Surfactants

LIU Hai-Yan1,2, GU Da-Ming1, LIU Guo-Yu1, ZHAO Xiu-Li2, CHEN Cheng2, XU Ke-Ming2   

  1. 1. Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China;
    2. Department of Chemistry and Chemical Engineering, Daqing Normal University, Daqing 163712, China
  • Received:2012-03-23 Online:2013-02-10 Published:2013-01-21

PDF (PC)

被引次数

19

摘要：

以2,2-双(溴甲基)-1,3-丙二醇为连接基合成了新型的连接基为枝状的Gemini咪唑表面活性剂2,4-二(溴化-3-烷基咪唑)-1,3-丙二醇([Cn-P-Cnim]Br2, n=10, 12, 14). 产物经核磁共振氢谱(1H NMR)、 红外(IR)光谱和元素分析等进行了分析, 证明所得产物即为目标产物. 通过表面张力法和电导法测量其表面活性并计算胶束形成热力学参数(). 结果表明, 25 ℃时3种表面活性剂均具有很高的表面活性, 胶束的形成是自发的熵驱动过程.

关键词: Gemini咪唑表面活性剂, 表面张力, 电导法, 临界胶束浓度, 胶束形成热力学参数

Abstract:

Gemini imidazolium surfactants 2,4-[Cn-P-Cnim]-1,3-propanediol(Br2, n=10, 12, 14) were synthesized with dibromoneopenty glycol as the spacer. The surfactants were characterized via 1H NMR spectra, IR spectra and elemental analysis, and the results prove that they are all the objective products. The surface activity and thermodynamic properties of micellization of the surfactants were characterized by surface tension and electrical conductivity measurements. The values of critical micelle concentration(cmc), γcmc, Γmax, Amin, pc20 and πcmc derived from surface tension measurement at 25 ℃ suggest that the surface activities of Br2 are high. While the thermodynamic parameters of micellization() of all the surfactants derived from electrical conductivity indicate that the formation of micelles is spontaneous and the micellization of [Cn-P-Cnim]Br2 is entropy-driven.

Key words: Gemini imidazolium surfactant, Surface tension, Electrical conductivity measurement, Critical micelle concentration(cmc), Thermodynamic parameter of micelle formation

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