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O. A. Soboleva
Selective
wetting of heterogenious surfaces by surfactant solutions
Abstract
Selective wetting of glass plates, treatment with
dimethyldichlorosilane, by aqueous tetradecyltrimethylammonium
bromide (TDTAB) solutions in p-xylene medium was investigated. It was
demonstrated that when surfactant concentrations were below CMC, contact angles
of selective wetting increased with the growth of glass surfaces
hydrophobisity. At concentrations above CMC contact angles were the similar on
all surfaces investigated. The results obtained were explained by surfactant
adsorptions at hydrophobic and hydrophilic parts of heterogeneous surfaces and
by the stability of wetting films.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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