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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.
Moscow University Chemistry Bulletin.
2004, Vol. 45, No. 2, P. 139
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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