Effect of different solvents on the low-frequency electrical conductivity of water-in-oil microemulsions
The low-frequency electrical conductivity of water-in-oil micro-emulsions, built up with different solvents (carbon tetrachloride, n-pentane, n-heptane and n-decane), has been measured in the temperature interval from 5 to 60°C, for different values of the water-to-surfactant ratio W, from 2 to 20. The results have been analyzed on the basis of the charge fluctuation theories recently proposed by Eicke, Hall and Halle and the effects of short-range attractive interactions due to surfactant tail interpenetration between two adjacent water droplets have been evaluated.
Key wordsMicroemulsions electrical conductivity charge fluctuation
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