Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (10): 2024.

• Articles • Previous Articles     Next Articles

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.

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

TrendMD: