Abstract
Within the framework of finite thick method the equation of the interfacial tension isotherm for a disperse particle of radius r (including the sphere of nanosize) immersed in a dispersive medium is obtained with taking into account the particle interactions in binary system. The account of particle interactions in condensed phases far from a critical condition has been conducted with use of a rigid transition layer model when the value of molar partial surface does not vary with change of an interfacial tension. Cases when the pressure in the dispersive medium and a dispersive particle are independent on temperature are considered. The known formulas received earlier by other authors follow from obtained equation of the interfacial tension isotherm at corresponding assumptions, including expressions for one-component system, flat boundary between two solutions in a binary system, condensed phase at the boundary of vapor and others.
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