Efeito do intemperismo artificial em quatro madeiras tropicais monitorado por espectroscopia de infravermelho (DRIFT)

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorPastore, Tereza Cristina Monteiro-
Autor(es): dc.creatorOliveira, Cynara Caroline Kern de-
Autor(es): dc.creatorRubim, Joel Camargo-
Autor(es): dc.creatorSantos, Kelly de Oliveira-
Data de aceite: dc.date.accessioned2021-10-14T17:43:23Z-
Data de disponibilização: dc.date.available2021-10-14T17:43:23Z-
Data de envio: dc.date.issued2017-12-07-
Data de envio: dc.date.issued2017-12-07-
Data de envio: dc.date.issued2008-
Fonte completa do material: dc.identifierhttp://repositorio.unb.br/handle/10482/27197-
Fonte completa do material: dc.identifierhttps://dx.doi.org/10.1590/S0100-40422008000800030-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/614731-
Descrição: dc.descriptionFour tropical woods, were investigated to compare their performance and natural resistances to artificial weathering using the diffuse reflectance infrared Fourier transform spectroscopy (DRIFT). The species were garapeira (Apuleia leiocarpa), itaúba (Mezilaurus itauba) and tauari (Couratari sp.), woods traditionally indicated for exterior uses, and marupá (Simarouba amara), that served as reference. The samples were submitted to cycles of UV radiation (350 nm) and water until 2,000 h. The photodegradation processes of woods surfaces were accomplished monitoring the changes in the intensities associated to lignin (1508 cm-1) and carbonyl group (1736 cm-1) absorptions. The results have shown that lignin was the first component to be photodegradated, resulting in surfaces mainly composed by cellulose, after 2,000 h of UV irradiation. The processes of formation and lixiviation of carbonyl compounds were different for each species. The experimental conditions used in this work were too severe to evaluate the wood density and extractives content influences during the treatment.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languagept_BR-
Publicador: dc.publisherSociedade Brasileira de Química-
Direitos: dc.rightsAcesso Aberto-
Direitos: dc.rightsQuímica Nova - Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons (CC BY NC 4.0). Fonte: https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422008000800030&lng=pt&nrm=iso&tlng=pt. Acesso em: 12 jan. 2021.-
Palavras-chave: dc.subjectEspectroscopia de infravermelho-
Palavras-chave: dc.subjectIntemperismo-
Palavras-chave: dc.subjectMadeira tropical-
Título: dc.titleEfeito do intemperismo artificial em quatro madeiras tropicais monitorado por espectroscopia de infravermelho (DRIFT)-
Título: dc.titleEffect of artificial weathering on tropical woods monitored by infrared spectroscopy (DRIFT)-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional – UNB

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