Percolation transition in microemulsions: Effect of water-surfactant ratio, temperature, and salinity

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Abstract
The conductivity of water-AOT-undecane microemulsions has been studied with respect to the molar ratio ω=[water]/[AOT], temperature, and salinity. [Here AOT is an abbreviation for sodium bis(2-ethylhexyl)sulfosuccinate.] The use of a percolation model gives an excellent agreement between experimental and calculated values. We have determined for three temperatures (T=15, 25, 35?deC) the positions of the percolation thresholds in the phase diagram. The influence of salinity shows the important role of the interactions between particles.