101. HIERARCHICAL MICRO–NANO COATINGS BY PAINTING
- Author
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Anna Kirveslahti, Tuulia Korhonen, Mika Suvanto, and Tapani A. Pakkanen
- Subjects
Materials science ,Polytetrafluoroethylene ,Nanoparticle ,02 engineering and technology ,Surfaces and Interfaces ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Surface energy ,0104 chemical sciences ,Surfaces, Coatings and Films ,Polyester ,Contact angle ,chemistry.chemical_compound ,chemistry ,Materials Chemistry ,Particle ,Wetting ,Composite material ,0210 nano-technology ,Fumed silica - 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[Formula: see text]. 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.
- Published
- 2016