Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (04): 413-419.doi: 10.3866/PKU.WHXB19910408

• ARTICLE • Previous Articles     Next Articles

Interaction Between Cationic-Antonic and Zwitterionic Surfactant in Mixed Aqueous Solutions

Ding Hui-Jun; Tian Bin; Zhao Guo-Xi   

  1. Laboratory of Colloid Chemistry, Institute of Physical Chemistry, Peking University, Beijing 100871
  • Received:1990-03-27 Revised:1990-07-20 Published:1991-08-15
  • Contact: Ding Hui-Jun

Abstract: Cationic-anionic surfactants have a high surface activity. But they are liable to precipitate as the concetration is slightly over cme, so their utilities are restricted. This paper describes their various surface properties and solubility phenomena when zwitterionic surfactant is mixed with them. The results indicate that (1) Owing to solubilization by the zwitterionic surfactant, the solubility of cationic-anionic surfactants is increased. (2) Proper amount of zwitterionic surfactant may keep the surface activity of the cationic-anionic surfactant essentially to be constant. (3) The molecular interaction between cationic-anionic and zwitterionic surfactants is stronger than that between cationic-anionic and nonioic surfactants in both surface layer and micelle; for HC-FC cationic-anionic and zwitterionic systems the saturated adsorption film possibly have a double-or multilayer structure.

Key words: Mixed surfactant, Molecular interaction, Surface activity