HIERARCHICAL MICRO–NANO COATINGS BY PAINTING

Anna Kirveslahti, Tuulia Korhonen, Mika Suvanto and Tapani A. Pakkanen
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Anna Kirveslahti: Department of Chemistry, University of Eastern Finland, P. O. Box 111, Joensuu, FIN-80101, Finland
Tuulia Korhonen: Department of Chemistry, University of Eastern Finland, P. O. Box 111, Joensuu, FIN-80101, Finland
Mika Suvanto: Department of Chemistry, University of Eastern Finland, P. O. Box 111, Joensuu, FIN-80101, Finland
Tapani A. Pakkanen: Department of Chemistry, University of Eastern Finland, P. O. Box 111, Joensuu, FIN-80101, Finland

Surface Review and Letters (SRL), 2016, vol. 23, issue 04, 1-9

Abstract: In this paper, the wettability properties of coatings with hierarchical surface structures and low surface energy were studied. Hierarchically structured coatings were produced by using hydrophobic fumed silica nanoparticles and polytetrafluoroethylene (PTFE) microparticles as additives in polyester (PES) and polyvinyldifluoride (PVDF). These particles created hierarchical micro–nano structures on the paint surfaces and lowered or supported the already low surface energy of the paint. Two standard application techniques for paint application were employed and the presented coatings are suitable for mass production and use in large surface areas. By regulating the particle concentrations, it was possible to modify wettability properties gradually. Highly hydrophobic surfaces were achieved with the highest contact angle of 165∘. Dynamic contact angle measurements were carried out for a set of selected samples and low hysteresis was obtained. Produced coatings possessed long lasting durability in the air and in underwater conditions.

Keywords: Superhydrophobicity; coatings; hierarchy; microparticles; nanoparticles; polyvinyldifluoride (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1142/S0218625X16500220

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