抄録
The thermodynamic equations to quantitatively well explain the temperature and pressure effects on the solubility of surfactants in water have been obtained by the application of the small system thermodynamics to a multi-component micellar solution coexisting at equilibrium with the crystalline solid phases of the component surfactants. The equation theoretically predicts the existence of the critical micellization temperature, the Krafft temperature, in the temperature effect on solubility at given pressure, and that of the critical micellization pressure; the Tanaka pressure, in the pressure effect on solubility at given temperature.