Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1070623
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dc.contributor.authorCADEMARTORI, P. H. G. dept_BR
dc.contributor.authorSTAFFORD, L.pt_BR
dc.contributor.authorBLANCHET, P.pt_BR
dc.contributor.authorMAGALHAES, W. L. E.pt_BR
dc.contributor.authorBOLZON DE MUNIZ, G. I.pt_BR
dc.date.accessioned2017-06-08T11:11:11Zpt_BR
dc.date.available2017-06-08T11:11:11Zpt_BR
dc.date.created2017-06-08pt_BR
dc.date.issued2017pt_BR
dc.identifier.citationRSC Advances, v. 7, n. 46, p. 29159-29169, Jun. 2017.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1070623pt_BR
dc.descriptionIn this study, fluorocarbon thin filmsweredepositedonthe surfaceofwhite spruce andBrazilian cedarwoods via atmospheric pressure dielectric barrier discharge in the afterglow mode with octafluoropropane gas. A pretreatment with oxygen plasma was introduced before the thin film deposition to determine if this plasma condition could increase the wood nano/micro roughness, helping to improve the hydrophobicity of the surface. The optimal conditions of water repellency for both woods were examined in terms of their resistance to aging in controlled conditions. The water contact angle measurements showed a hydrophobic surface with a stable angle for both woods. X-ray photoelectron spectroscopy reveals the presence of CF, CF2 and CF3 functional groups after the Ar/C3F8 plasma, especially for longer treatments. The open-air system of the plasma reactor leads to the simultaneous fluorination and incorporation of oxygen-containing groups. The pre-treatment of oxygen plasma increases the wood roughness; however, the chemical attachment of oxygen molecules is more significant, negatively affecting the degree of repellency of the plasma-coated woods. On the other hand, the fluorocarbon deposition increases the wood roughness and creates a hydrophobic surface simultaneously. Even with partial defluorination after aging, both plasma-coated woods retain a similar degree of water repellency, which partially avoid chemical reorganization of their surface due to environmental exposure.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectPlasma a friopt_BR
dc.subjectFilme de fluorcarbonopt_BR
dc.subjectMolhabilidadept_BR
dc.subjectPlasma atmosféricopt_BR
dc.subjectSuperfície hidrofóbicapt_BR
dc.subjectPlasma treatmentpt_BR
dc.subjectSurface modificationpt_BR
dc.subjectWettingpt_BR
dc.subjectAtmospheric plasmapt_BR
dc.subjectHydrophobic surfacept_BR
dc.titleEnhancing the water repellency of wood surfaces by atmospheric pressure cold plasma deposition of fluorocarbon film.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2017-07-11T11:11:11Zpt_BR
dc.subject.thesagroMadeirapt_BR
dc.subject.nalthesaurusWood treatmentpt_BR
riaa.ainfo.id1070623pt_BR
riaa.ainfo.lastupdate2017-07-11pt_BR
dc.identifier.doi10.1039/c7ra03334fpt_BR
dc.contributor.institutionPedro Henrique Gonzalez de Cademartori, Doutorando da UFPR; Luc Stafford, Departement de Physique, Universite de Montreal; Pierre Blanchet, NSERC; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Graciela Ines Bolzon de Muniz, UFPR.pt_BR
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