Surface tension of a solid with adsorption on its surface with its deformation and surface electric charge considered

The surface tension of a solid at its interface with a liquid phase containing a surfactant is considered. The deformation of the solid surface and its electric charge are taken into account. In terms of the previously proposed theory on equilibrium one-component adsorption on the solid surface with deformation of this surface taken into account, for the model involving two parallel capacitors, the criteria for the "positive" and "negative" Rehbinder effects are obtained. The conditions under which the "positive" Rehbinder effect disappears in moving from tensile deformation to compressive deformation are given. An expression for the derivative of the surface tension with respect to the electric potential of the solid is derived.