Film and line tension effects on the attachment of particles to an interface: I. Conditions for mechanical equilibrium of fluid and solid particles at a fluid interface

A general variational approach has been applied to derive the conditions for mechanical equilibrium of fluid and solid particles at an interface in the presence of an external field. It is shown that Young's equation for solid particles does not follow from force balance, which is due to the di...

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Bibliographic Details
Published in:Journal of colloid and interface science 1986, Vol.112 (1), p.97-107
Main Authors: Ivanov, Ivan Boyanov, Kralchevsky, Peter Atanassov, Nikolov, Alexander Dushkov
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Gas-liquid interface and liquid-liquid interface
General and physical chemistry
Surface physical chemistry
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Summary:A general variational approach has been applied to derive the conditions for mechanical equilibrium of fluid and solid particles at an interface in the presence of an external field. It is shown that Young's equation for solid particles does not follow from force balance, which is due to the difference between the surface tension and the specific surface free energy of the solid. The correct definition of the contact angles in the presence of an external field is discussed.
ISSN:0021-9797
1095-7103
DOI:10.1016/0021-9797(86)90072-X