Two-liquid wetting properties as a surface polarity probe for hydrophobic coatings

A model for the spreading of a non-polar liquid on a surface within a polar medium is described theoretically, according to Fowkes, Good and Girifalco approximations on interfacial tension. We demonstrate both theoretically and experimentally that surface polarity measurements using the contact angl...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2017, Vol.19 (4), p.3214-3218
Main Authors: Bonfante, G, Chevalliot, S, Toury, B, Berge, B, Maillard, M
Format: Article
Language:English
Subjects:
Approximation
Chemical Sciences
Error analysis
Liquids
Mathematical analysis
Mathematical models
or physical chemistry
Permissible error
Polarity
Spreading
Theoretical and
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Summary:A model for the spreading of a non-polar liquid on a surface within a polar medium is described theoretically, according to Fowkes, Good and Girifalco approximations on interfacial tension. We demonstrate both theoretically and experimentally that surface polarity measurements using the contact angle of two immiscible liquids minimize drastically the measurement error. The present method has been successfully applied to various substrates of variable polarity and overall surface energy. We also demonstrate that this method allows a direct measurement of surface sensitivity to pH.
ISSN:1463-9076
1463-9084
DOI:10.1039/c6cp07392a