ABSTRACT
Porous bodies represent one of the disperse states of matter studied by physical chemistry of colloid and surface phenomena. Such disperse systems, where close contacts between the particles of the solid phase provide a constancy of shape, are referred to as rigid porous bodies. The strength of a porous body, peculiarities of its structure and pore sizes depend on the forces acting between particles. Various properties of a porous body may be described by different characteristic features of pore space geometry. Methods for the determination of the parameters of porous structure are based on various approaches: simple capillary models are generally used. To investigate the porous structure of film materials, one can apply the method of displacement of a liquid from a completely saturated specimen by a gas or another immiscible liquid. For non-rigid porous bodies irreversibly changing their structure during liquid evacuation, the data on porous structure can be obtained by measuring the rate of the liquid flow.
