VOLUMETRIC AND TRANSPORT-PROPERTIES OF AEROSOL-OT REVERSED MICELLES CONTAINING LIGHT AND HEAVY-WATER

Densities and viscosities of sodium bis(2-ethylhexyl) sulfosuccinate (AOT /n-heptane system containing light and heavy water, as a function of the molar ratio R (R = [H2O or D2O]/[AOT]) were measured at 0, 5, 25 and 40-degrees-C. At low R values, the apparent molar volume of deuterium oxide is smaller than that of light water. The difference is related to the strength of the hydrogen bonding H2O and D2O. The viscosities of both H2O-AOT-n-heptane and D2O-AOT-n-heptane systems were explained in terms of intermicellar interactions mainly governed by hydration of the head groups of AOT.