高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (10): 2024.

• 研究论文 • 上一篇    下一篇

含Gemini表面活性剂结构单元的新型两亲聚电解质的合成及聚集行为

李荣强1,2, 徐承凤2, 韦鲁滨1, 王金本2   

  1. 1. 中国矿业大学(北京)化学与环境工程学院, 北京 100083;
    2. 中国科学院化学研究所, 胶体、界面与化学热力学重点实验室, 北京 100190
  • 收稿日期:2010-03-01 出版日期:2010-10-10 发布日期:2010-10-10
  • 通讯作者: 王金本, 男, 博士, 研究员, 主要从事两亲功能分子的设计及性能研究. E-mail: jbwang@iccas.ac.cn
  • 基金资助:

    国家“八六三”计划项目(批准号: 2007AA090701-2)和国家科技重大专项基金(批准号: 2008ZX05024-02)资助.

Synthesis and Self-aggregation Behavior of Novel Amphiphilic Polyelectrolytes Containing Gemini Surfactant Units

LI Rong-Qiang1,2, XU Cheng-Feng2, WEI Lu-Bin1, WANG Jin-Ben2*   

  1. 1. School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;
    2. Key Laboratory of Colloid, Interface and Chemical Termodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2010-03-01 Online:2010-10-10 Published:2010-10-10
  • Contact: WANG Jin-Ben. E-mail: jbwang@iccas.ac.cn
  • Supported by:

    国家“八六三”计划项目(批准号: 2007AA090701-2)和国家科技重大专项基金(批准号: 2008ZX05024-02)资助.

摘要: 分别将Gemini型单体1,3-双(二甲基十四烷基溴化铵)-2-丙烯酰氧基丙烷(14G)或1,3-双(二甲基十六烷基溴化铵)-2-丙烯酰氧基丙烷(16G)与丙烯酰氧乙基三甲基氯化铵(DAC, D)共聚合反应, 合成了新型含Gemini表面活性剂结构单元的两亲性阳离子聚电解质(D14G和D16G). 采用稳态荧光、电导、动态光散射及透射电镜等手段研究了这些聚电解质在水溶液中的聚集行为. 结果表明, 临界聚集浓度(CAC)随着Gemini型表面活性剂单元含量的增加而减小, 同时随着Gemini型表面活性剂单元中疏水碳链长度的增加而降低. 这些聚电解质在水溶液中同时存在分子内和分子间两种类型的聚集体, 而且碳链越长, 形成分子内聚集体的倾向越强. 随着Gemini表面活性剂单元含量的增加, D14G溶液中聚集体的流体动力学半径(Rh)也有所增大, 而D16G溶液中的聚集体的流体动力学半径(Rh) 却略有减小.

关键词: 聚电解质, 两亲性, Gemini表面活性剂单体, 聚集行为

Abstract: A novel class of amphiphilic polyelectrolytes bearing Gemini surfactant units were synthesized using the copolymerization of acryloyloxyethyltrimethylammonium chloride(D) and Gemini surfactant type monomer 1,3-bis(N,N-dimethyl-N-alkylammonium)-2-proplylacrylate dibromide(G)(alkyl=tetradecyl or cetyl). The self-aggregation properties of these polyelectrolytes in aqueous solution were investigated by steady fluorescence, conductivity, dynamic light scattering(DLS) and Transmission electron microscopy(TEM) techniques as the function of the molar fraction of Gemini surfactant units in the polyelectrolyte. It was found that the cri-tical aggregation concentration(CAC) decreases with the increase of molar fraction of Gemini surfactant segments and the length of alkyl chain on the Gemini surfactant units. Two kinds of aggregates coexist in the solution, one of which is suggested to be intrapolymer aggregate and the other is interpolymer aggregate. With the increase of alkyl chain length, the polyelectrolytes exhibit a strong preference for intrapolymer hydrophobe self-aggregation. With the increase of molar fraction of Gemini segments, the hydrodynamic radius(Rh) increases in the case of D14G and oppositely decreases slightly in the case of D16G.

Key words: Polyelectrolyte, Amphiphilicity, Gemini surfactant-type monomer, Aggregation behavior

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