PRESSURE-DEPENDENCE OF THE INTERFACIAL-TENSION BETWEEN FLUID PHASES .2. APPLICATION TO LIQUID VAPOR INTERFACES AND TO INTERFACES OF AMPHIPHILIC SOLUTIONS

We extend our previous theoretical study (preceding paper in this issue) of the pressure dependence of the interfacial tension, 嵾(p), between two fluid phases with a planar interface. The theory is applied to pressurized liquid-vapor surfaces. The case of surface-active amphiphiles is treated as a third phase residing at the interface between the two liquids; we predict a change in behavior at the critical micelle concentration. The theory is applied to pressurized liquid-vapor and liquid-liquid surfaces of aqueous surfactant solutions. We also discuss the case of phase separation in micellar and microemulsion solutions. © 1990, American Chemical Society. All rights reserved.