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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
08/06/2017 |
Data da última atualização: |
11/07/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
CADEMARTORI, P. H. G. de; STAFFORD, L.; BLANCHET, P.; MAGALHAES, W. L. E.; BOLZON DE MUNIZ, G. I. |
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. |
Título: |
Enhancing the water repellency of wood surfaces by atmospheric pressure cold plasma deposition of fluorocarbon film. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
RSC Advances, v. 7, n. 46, p. 29159-29169, Jun. 2017. |
DOI: |
10.1039/c7ra03334f |
Idioma: |
Inglês |
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. |
Palavras-Chave: |
Atmospheric plasma; Filme de fluorcarbono; Hydrophobic surface; Molhabilidade; Plasma a frio; Plasma atmosférico; Plasma treatment; Superfície hidrofóbica; Surface modification; Wetting. |
Thesagro: |
Madeira. |
Thesaurus Nal: |
Wood treatment. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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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Embrapa Florestas (CNPF) |
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Biblioteca(s): |
Embrapa Semiárido; Embrapa Uva e Vinho. |
Data corrente: |
05/01/2017 |
Data da última atualização: |
10/04/2024 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
CUNHA, T. J. F.; FLORES, C. A.; SA, I. B.; RIBEIRO FILHO, M. R.; MAZUTII, M.; TAURA, T. A.; SANTANA, M. de B.; PEREIRA, G. E. |
Afiliação: |
TONY JARBAS FERREIRA CUNHA, CPATSA; CARLOS ALBERTO FLORES, CPACT; IEDO BEZERRA SA, CPATSA; Mateus Rosa Ribeiro Filho, UFRPE, Recife, PE, Brazil; Marcos Mazutii, IFF Sertão Petrolina, PE, Brazil; TATIANA AYAKO TAURA, CPATSA; Mayame de Brito Santana, UFRPE, Recife, PE, Brazil; GIULIANO ELIAS PEREIRA, CNPUV / CPATSA. |
Título: |
Soil zoning for wine certification of ride region of the sub-medium São Francisco river, Brazil. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
In: INTERNATIONAL SYMPOSIUM ON TROPICAL WINES, 5., 2016, Petrolina. Book of abstracts... Petrolina: Embrapa Semiárido, 2016. |
Páginas: |
p. 16. |
Idioma: |
Inglês Português |
Conteúdo: |
The Agricultural Zoning takes into account the combination of factors such as soil and the socioeconomic environment, in order to organize the rational distribution of economically profitable tillage, the social and cultural characteristics of each region and the basis for territorial of land use. In addition, the edaphic zoning reinforces the potential of soils for economic development of a particular tillage. |
Palavras-Chave: |
Certificação de vinho; Videira; Vitivinicultura; Zoneamento Agropecuário; Zoneamento Edáfico. |
Thesagro: |
Vinho. |
Thesaurus NAL: |
Grapes. |
Categoria do assunto: |
E Economia e Indústria Agrícola |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/152779/1/Giuliano-p16-Book-of-Abstracts-ISTW-2016.pdf
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Marc: |
LEADER 01319nam a2200289 a 4500 001 2060113 005 2024-04-10 008 2016 bl uuuu u00u1 u #d 100 1 $aCUNHA, T. J. F. 245 $aSoil zoning for wine certification of ride region of the sub-medium São Francisco river, Brazil.$h[electronic resource] 260 $aIn: INTERNATIONAL SYMPOSIUM ON TROPICAL WINES, 5., 2016, Petrolina. Book of abstracts... Petrolina: Embrapa Semiárido$c2016 300 $ap. 16. 520 $aThe Agricultural Zoning takes into account the combination of factors such as soil and the socioeconomic environment, in order to organize the rational distribution of economically profitable tillage, the social and cultural characteristics of each region and the basis for territorial of land use. In addition, the edaphic zoning reinforces the potential of soils for economic development of a particular tillage. 650 $aGrapes 650 $aVinho 653 $aCertificação de vinho 653 $aVideira 653 $aVitivinicultura 653 $aZoneamento Agropecuário 653 $aZoneamento Edáfico 700 1 $aFLORES, C. A. 700 1 $aSA, I. B. 700 1 $aRIBEIRO FILHO, M. R. 700 1 $aMAZUTII, M. 700 1 $aTAURA, T. A. 700 1 $aSANTANA, M. de B. 700 1 $aPEREIRA, G. E.
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