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A. V. Ivanov, B. D. Summ
On the new approach to the theory
of preferential wetting of heterogeneous solid surfaces
Abstract
The model of preferential wetting
of heterogeneous solid surfaces is proposed.
In a basis of model the assumption about two stage – wetting
mechanism lays: at the first stage
there is a displacement of a precursor phase; on the second — direct
wetting of the solid surface by wetting liquid. Within the framework of the
offered model the line of three-phase contact represents ensemble of
alternating sites of positive and negative curvature. Conditions of balance on a three-phase line (TPL) for a case
when displacement of a precursor phase is limiting stage of process of
selective (preferential) wetting are considered. The equation binding a static contact angle with a relative share
of sites of different curvature on TPL is presented.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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