Interaction Between Cationic-Anionic and Nonionic Surfactants in Mixed Aqueous Solutions

Abstract

Abstract: Cationic-anionic surfactants have a high surface acivity. But they are liable to precipitate as the concentration is slightly over cmc, so their uses are restricted. This paper describes their various surface properties and solubility phenomena when a nonionic surfactant is added into them. The results indicate that (1) owing to solubilization of nonionic surfactant, the solubility of cationic-anionic surfactants is increased and the surface activity of cationic-anionic surfactant is essentially kept constant under the condition of certain proportions; (2) the interaction between cationic-anionic and nonionic surfactants is very small, they can form nearly an ideal mixed micelle; (3) the cloud points of TX-100(8. 33 × 10^-3mol/kg) increase as the concentration of C⁺C^-increases and decrease as the concentration of C⁺C^-goes beyond the cmc.

Key words: Mixed surfactant, Molecular interaction, Cloud point

TrendMD:

Ding Hui-jun, Hou Xiang-ling, Zhao Guo-xi . Interaction Between Cationic-Anionic and Nonionic Surfactants in Mixed Aqueous Solutions[J]. Chem. J. Chinese Universities, 1991, 12(2): 222.

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Interaction Between Cationic-Anionic and Nonionic Surfactants in Mixed Aqueous Solutions

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