Journal of Surface Science and Technology

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The Interaction between Zwitterionic Hydrocarbon and Anionic Fluorocarbon Surfactants in Dilute and Concentrated Aqueous Solutions


Affiliations
1 Department of Applied Chemistry and Institute of Colloid and Interface Science, Science University of Tokyo, Kagurazaka, Shinjulcu-ku, Tokyo 162, Japan
     

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The interaction between a zwitterionic hydrocarbon surfactant, N-tetradecyl-N,N-dimethyl betaine (TNB) and an anionic fiuorocarbon surfactant, lithium perfluorooctanesulfonate (LiFOS) in dilute aqueous solution in the presence of 0.01 moldm-3 LiCl has been investigated by means of surface tension, static and dynamic light scattering, solubilization of water-insoluble dye, fluorescence probing and rheological measurements. The same system in concentrated aqueous solution has been characterized from the phase diagram. In the concentrated system, the lamellar liquid crystal phase forms at low surfactant concentrations over a wide region. The L3 phase has been observed at composition weight ratio of TNB:LiFOS = 0.7:0.3 (molar function of TNB, XTNB = 0.8). On the other hand, the mixed system in dilute aqueous solutions has shown a composition dependence of micellar properties and synergistic effect. At XTNB = 0.8, the solubilized amount of a water-insoluble dye and relative viscos ities have shown maxima, whereas the diffusion coefficient has shown a minimum. A strong shear dependence has been observed at XTNB = 0.8. The L3 phase aggregates consist of plate-like micelles.

Keywords

Zwitterionic Hydrocarbon Surfactant, Anionic Fiuorocarbon Surfactant, Mixed Micelle, L3 Phase, Plate-Like Micelle.
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  • The Interaction between Zwitterionic Hydrocarbon and Anionic Fluorocarbon Surfactants in Dilute and Concentrated Aqueous Solutions

Abstract Views: 254  |  PDF Views: 2

Authors

Masataka Ogawa
Department of Applied Chemistry and Institute of Colloid and Interface Science, Science University of Tokyo, Kagurazaka, Shinjulcu-ku, Tokyo 162, Japan
Kunio Esumi
Department of Applied Chemistry and Institute of Colloid and Interface Science, Science University of Tokyo, Kagurazaka, Shinjulcu-ku, Tokyo 162, Japan

Abstract


The interaction between a zwitterionic hydrocarbon surfactant, N-tetradecyl-N,N-dimethyl betaine (TNB) and an anionic fiuorocarbon surfactant, lithium perfluorooctanesulfonate (LiFOS) in dilute aqueous solution in the presence of 0.01 moldm-3 LiCl has been investigated by means of surface tension, static and dynamic light scattering, solubilization of water-insoluble dye, fluorescence probing and rheological measurements. The same system in concentrated aqueous solution has been characterized from the phase diagram. In the concentrated system, the lamellar liquid crystal phase forms at low surfactant concentrations over a wide region. The L3 phase has been observed at composition weight ratio of TNB:LiFOS = 0.7:0.3 (molar function of TNB, XTNB = 0.8). On the other hand, the mixed system in dilute aqueous solutions has shown a composition dependence of micellar properties and synergistic effect. At XTNB = 0.8, the solubilized amount of a water-insoluble dye and relative viscos ities have shown maxima, whereas the diffusion coefficient has shown a minimum. A strong shear dependence has been observed at XTNB = 0.8. The L3 phase aggregates consist of plate-like micelles.

Keywords


Zwitterionic Hydrocarbon Surfactant, Anionic Fiuorocarbon Surfactant, Mixed Micelle, L3 Phase, Plate-Like Micelle.