Abnormal Dielectric Response of Aerosol OT W/O Microemulsion in Cyclohexane at 298.15 K
A dielectric constant for W/O microemulsions consisting of sodium bis (2-ethyhexyl) sulfosuccinate (AOT), water and cyclohexane was measured at 1 MHz and at 298.15 K. Minima were found in the dielectric constant when a molar ratio of water to AOT was 15 irrespectively of the AOT concentration. This minimum would be related to symmetric hydration of ions, therefore, water pool in the microemulsion becomes more nonpolar around the ratio of 15.