Abstract
Electrical transient techniques were used to study conduction processes and surfactant aggregation in low conductivity dielectric liquids containing surfactant and water. Dependence of the transient conduction on electric field, cell thickness, water and surfactant concentrations, electrode materials, temperature and impurities was determined. Charged species are likely inverted micelles of surfactant and water molecules. In Aerosol OT+water+m-xylene system with surfactant concentrations below 10 mM and water concentration extrapolated to zero, the mobility of charged micelles is 1.2 × 10-8 m2/Vsec and the corresponding micellar diameter with one electron charge per micelle is 22A. The degree of ionization is very low relative to aqueous systems. The fraction of ionized species is in part per million range with respect to concentration of surfactant or water molecules.
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