Fabrication of micro-/nano-structured super-hydrophobic fluorinated polymer coatings by cold-spray
| Autor: | Yuji Ichikawa, Kesavan Ravi, Kazuhiro Ogawa, Wesley Lock Sulen, C.A. Bernard |
|---|---|
| Přispěvatelé: | Tohoku University [Sendai], ELyTMaX, École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Tohoku University [Sendai]-Centre National de la Recherche Scientifique (CNRS), FRIS - Frontier Research Institute for Interdisciplinary Sciences |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Fabrication Gas dynamic cold spray 02 engineering and technology engineering.material Nanoceramic [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] Contact angle [PHYS.MECA.STRU]Physics [physics]/Mechanics [physics]/Structural mechanics [physics.class-ph] 0203 mechanical engineering Coating Materials Chemistry Composite material ComputingMilieux_MISCELLANEOUS chemistry.chemical_classification Surfaces and Interfaces General Chemistry Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics Perfluoroalkoxy alkane Superhydrophobic coating Surfaces Coatings and Films 020303 mechanical engineering & transports chemistry engineering 0210 nano-technology |
| Zdroj: | Surface and Coatings Technology Surface and Coatings Technology, Elsevier, 2019, 373, pp.17-24. ⟨10.1016/j.surfcoat.2019.05.078⟩ |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2019.05.078 |
| Popis: | A fabrication of superhydrophobic Perfluoroalkoxy Alkane (PFA) coatings on stainless steel surfaces by cold-spray technique has been demonstrated in this work. The in-situ supersonic impact deposition and consolidation of finely divided 20–40 μm powder material yielded hydrophobic thin coatings of PFA which exhibited contact angles of 125° but high roll off angles of 60°. The deposition efficiencies were less than 0.5%, coating was mechanically very fragile and non-uniform. However, the cold-spray deposition efficiency was subsequently increased to almost 15% by performing simple modification of particle surface morphology by introducing organosilane coated nanoceramic layers on the PFA particles and by laser texturing the stainless steel substrate surfaces to form mountain-valley micro-structures. The nanoceramic interlayers formed bridge bonds at the particle-particle interface and laser texturing achieved efficient coating-substrate interlock. The improved coatings exhibited super-hydrophobic character with 160° contact angle and 6° roll-off angle. The superhydrophobicity was seen to be as a result of micro-/nano-structured surface consisting of papillae like structures capped by a layer of hydrophobic nanoceramic. The coating also exhibited excellent water repellency. |
| Databáze: | OpenAIRE |
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