Open AccessMethod and device for the control of surface properties of porous solids at the boundary of their contact with liquids and gases
Author(s) -
М. М. Чуйко,
Лідія Витвицька,
Наталія Піндус
Publication year - 2021
Publication title -
ukraïnsʹkij metrologìčnij žurnal
Language(s) - English
Resource type - Journals
eISSN - 2522-1345
pISSN - 2306-7039
DOI - 10.24027/2306-7039.2.2021.236089
Subject(s) - wetting , porosity , contact angle , materials science , hysteresis , surface roughness , surface (topology) , solid body , porous medium , composite material , mechanics , condensed matter physics , geometry , physics , mathematics
The article indicates the relevance of the problem of controlling the surface properties of solids, analyzes the features of interaction between porous solids in direct contact with liquids.
The process of adhesive interaction of the system “liquid – porous solid” at the interface of these phases is analyzed and the dependence of the degree of wetting by a liquid of the surface of a solid on the structure of the porous body and the surface properties of the liquid is established. The dependence of the contact angle hysteresis of the solid with liquid on the porosity and roughness of the sample of the controlled body is substantiated.
A method of complex express control of the wetting process, which consists in determining the hysteresis of fluid flowing in and out from the surface of a solid body, has been proposed. The method consists in determining the rate of liquid outflow from a tilted sample of a solid. At the same time, the liquid is applied with the same speed to the surface of a porous body sample. The design of device for realization of the method has been developed.