Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (09): 830-834.doi: 10.3866/PKU.WHXB20020913

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The Study of Bolaamphiphile/SDS Mixed Systems by Applying the Regular Solution Theory

Yan Yun;Han Feng;Huang Jian-Bin;Li Zi-Chen;Ma Ji-Ming   

  1. College of Chemistry and Molecular Engineering, Peking University,Beijing 100871
  • Received:2002-01-25 Revised:2002-03-13 Published:2002-09-15
  • Contact: Huang Jian-Bin E-mail:JBHuang@chem.pku.edu.cn

Abstract: The interaction of molecules on the surface and in the micelle of the mixed system of cationic bolaamphiphile/sodium dodecyl sulfate(SDS) was studied by using regular solution theory. The interaction parameter indicates that strong interaction exists both in the surface adsorption layer and in the micelle. The strength of the interaction is similar to that of conventional alkyl quaternary ammonium salt/alkyl sodium sulfate mixed system. This means the synergism in the bolaamphiphile/SDS mixed system is mainly caused by the electrostatic interaction between the hydrophilic head group, but not apparently affected by the hydrophobic part of the bola molecules.

Key words: Regular solution theory, Bolaamphiphile, Interaction, Micelle, Surface adsorption layer