Options for chemical modification of wastes from a brazilian hardwood species and potential applications

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorBufalino, Lina-
Autor(es): dc.creatorCaixeta, Leandro Afonso-
Autor(es): dc.creatorProtásio, Thiago de Paula-
Autor(es): dc.creatorScatolino, Mario Vanoli-
Autor(es): dc.creatorMesquita, Ricardo Gabriel de Almeida-
Autor(es): dc.creatorMendes, Lourival Marin-
Autor(es): dc.creatorTonoli, Gustavo Henrique Denzin-
Autor(es): dc.creatorMarconcini, José Manoel-
Data de aceite: dc.date.accessioned2026-02-09T11:36:58Z-
Data de disponibilização: dc.date.available2026-02-09T11:36:58Z-
Data de envio: dc.date.issued2020-07-08-
Data de envio: dc.date.issued2020-07-08-
Data de envio: dc.date.issued2014-12-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/41754-
Fonte completa do material: dc.identifierhttps://doi.org/10.4028/www.scientific.net/KEM.634.321-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1143587-
Descrição: dc.descriptionTwo pathways for chemical modification of wastes from an Amazon hardwood species named Cordia goeldiana were proposed in this work. Variations in reaction time (2 h or 0.5 h) and temperature (80 and 150 °C), besides reaction medium (mechanical stirring or pressurized closed system) were tested for alkali treatment. NaOH at 5% was kept for both conditions. Afterwards, bleaching with H2O2 and NaOH was performed, but reaction conditions were held constant for both pathways. In general, the mild alkali treatment resulted mainly in the removal of extractives and hemicelluloses from the raw sawdust. The onset temperature and crystalline index increased. On the other hand, the use of higher pressure and temperature in alkali treatment at closed system had a remarkable lignin removal and crystalline index increase without changing cellulose polymorphism as the main effects, but thermal stability became lower. Apart from mineral residues removal, bleaching had negligible effects on fiber properties, suggesting that this procedure could be avoided.-
Idioma: dc.languageen-
Publicador: dc.publisherTrans Tech Publications Ltd.-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceKey Engineering Materials-
Palavras-chave: dc.subjectWood - Alkali Treatment-
Palavras-chave: dc.subjectWood - Bleaching-
Palavras-chave: dc.subjectWood - Reinforcement-
Palavras-chave: dc.subjectResíduos vegetais-
Palavras-chave: dc.subjectMadeira - Tratamento alcalino-
Palavras-chave: dc.subjectMadeira - Branqueamento-
Palavras-chave: dc.subjectMadeira - Reforço-
Palavras-chave: dc.subjectCellulose-
Título: dc.titleOptions for chemical modification of wastes from a brazilian hardwood species and potential applications-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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