Self-diffusion near the percolation threshold in reverse microemulsions

摘要

Self-diffusion measurements of reverse water-acrylamide-sodium bis(2-ethylhexyl)sulfosuccinate-toluene microemulsions have identified a distinct increase in water proton diffusion above the percolation threshold in cosurfactant chemical potential. This increase is assigned to water transport through fractal aggregates and clusters. Above threshold, increasing apparent partitioning of water and cosurfactant into the continuous pseudophase yields an order parameter for estimating percolating cluster volume, and shows that cosurfactant preferentially segregates into these clusters.