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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
08/06/2017 |
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Data da última atualização: |
11/07/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CADEMARTORI, P. H. G. de; STAFFORD, L.; BLANCHET, P.; MAGALHAES, W. L. E.; BOLZON DE MUNIZ, G. I. |
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Afiliação: |
Pedro 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. |
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Título: |
Enhancing the water repellency of wood surfaces by atmospheric pressure cold plasma deposition of fluorocarbon film. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
RSC Advances, v. 7, n. 46, p. 29159-29169, Jun. 2017. |
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DOI: |
10.1039/c7ra03334f |
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Idioma: |
Inglês |
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Conteúdo: |
In 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. |
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Palavras-Chave: |
Atmospheric plasma; Filme de fluorcarbono; Hydrophobic surface; Molhabilidade; Plasma a frio; Plasma atmosférico; Plasma treatment; Superfície hidrofóbica; Surface modification; Wetting. |
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Thesagro: |
Madeira. |
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Thesaurus Nal: |
Wood treatment. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/160655/1/2017-Washington-RCSA-Enhancing.pdf
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Marc: |
LEADER 02486naa a2200325 a 4500
001 2070623
005 2017-07-11
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1039/c7ra03334f$2DOI
100 1 $aCADEMARTORI, P. H. G. de
245 $aEnhancing the water repellency of wood surfaces by atmospheric pressure cold plasma deposition of fluorocarbon film.$h[electronic resource]
260 $c2017
520 $aIn 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.
650 $aWood treatment
650 $aMadeira
653 $aAtmospheric plasma
653 $aFilme de fluorcarbono
653 $aHydrophobic surface
653 $aMolhabilidade
653 $aPlasma a frio
653 $aPlasma atmosférico
653 $aPlasma treatment
653 $aSuperfície hidrofóbica
653 $aSurface modification
653 $aWetting
700 1 $aSTAFFORD, L.
700 1 $aBLANCHET, P.
700 1 $aMAGALHAES, W. L. E.
700 1 $aBOLZON DE MUNIZ, G. I.
773 $tRSC Advances$gv. 7, n. 46, p. 29159-29169, Jun. 2017.
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Registro original: |
Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
08/02/2011 |
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Data da última atualização: |
21/02/2011 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
GALISA, P. de S. G.; PEREIRA, W.; SILVA, H. A. P. da; MOREIRA, I. M.; GONÇALO, T. P.; SILVA, J. R. da; VIDAL, M. S.; BALDANI, J. I.; ARAUJO, J. L. S. de; REIS, V. M. |
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Afiliação: |
Péricles de Souza Galisa, UFRRJ; Willian Pereira, UFRRJ; Helder Anderson Pinto da Silva, UFRRJ; Igor Maia Moreira, UFRRJ; Túlio Porto Gonçalo, UFRRJ; José Rodrigo da Silva, UFRRJ; MARCIA SOARES VIDAL, CNPAB; JOSE IVO BALDANI, CNPAB; JEAN LUIZ SIMOES DE ARAUJO, CNPAB; VERONICA MASSENA REIS, CNPAB. |
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Título: |
Obtenção de fragmentos derivados de transcritos diferencialmente expressos em raízes de cana-de-açúcar inoculada com bactérias diazotróficas. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
In: SEMANA CIENTÍFICA JOHANNA DÖBEREINER, 10., 18 a 24 de outubro de 2010, Seropédica. Ciência para o Desenvolvimento Sustentável: anais... Seropédica: Embrapa Agrobiologia, 2010. |
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Idioma: |
Português |
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Palavras-Chave: |
bactérias diazotróficas; CDNA-AFLP. |
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Thesagro: |
Inoculação. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/27871/1/26-Obtencao-de-fragmentos-derivados-de-transcritos-diferencialmente-expressos-em-raizes.pdf
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Marc: |
LEADER 00926nam a2200241 a 4500
001 1876182
005 2011-02-21
008 2010 bl uuuu u00u1 u #d
100 1 $aGALISA, P. de S. G.
245 $aObtenção de fragmentos derivados de transcritos diferencialmente expressos em raízes de cana-de-açúcar inoculada com bactérias diazotróficas.$h[electronic resource]
260 $aIn: SEMANA CIENTÍFICA JOHANNA DÖBEREINER, 10., 18 a 24 de outubro de 2010, Seropédica. Ciência para o Desenvolvimento Sustentável: anais... Seropédica: Embrapa Agrobiologia$c2010
650 $aInoculação
653 $abactérias diazotróficas
653 $aCDNA-AFLP
700 1 $aPEREIRA, W.
700 1 $aSILVA, H. A. P. da
700 1 $aMOREIRA, I. M.
700 1 $aGONÇALO, T. P.
700 1 $aSILVA, J. R. da
700 1 $aVIDAL, M. S.
700 1 $aBALDANI, J. I.
700 1 $aARAUJO, J. L. S. de
700 1 $aREIS, V. M.
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Embrapa Agrobiologia (CNPAB) |
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