Changes in the content and composition of the extractives in thermally modified tropical hardwoods

Detalhes bibliográficos
Autor(a) principal: Esteves, Bruno
Data de Publicação: 2022
Outros Autores: Ayata, Umit, Cruz-Lopes, Luísa, Brás, Isabel, Ferreira, José, Domingos, Idalina
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.19/7322
Resumo: Chemical composition of wood is known to change during thermal treatments. Two species grown in Turkey, afrormosia (Pericopsis elata) and duka (Tapirira guianensis) were heat treated according to Thermowood® method. Lignin, cellulose, hemicelluloses and extractives in dichloromethane, ethanol and water were determined. Wood extracts were analysed by gas chromatography with mass detection and existing compounds were identified by NIST17 database. Results show that hemicelluloses and cellulose content decreased for both heat-treated woods along the treatment while lignin percentage increased. The analysis of extractives has shown several compounds normally associated to lignin thermal degradation that increased along the treatment. At the same time several compounds associated to carbohydrate thermal degradation were found in all the extracts for both heat-treated woods. These founding have allowed the understanding of the degradation pattern of wood during thermal modification. There was not much difference between afrormosia and duka woods structural compounds behaviour along thermal modification. However, the variation of the amount of extractives along the treatment depended on the species.
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spelling Changes in the content and composition of the extractives in thermally modified tropical hardwoodsAfrormosiachemical changesdukaextractivesheat treatmentPericopsis elataTapirira guianensisChemical composition of wood is known to change during thermal treatments. Two species grown in Turkey, afrormosia (Pericopsis elata) and duka (Tapirira guianensis) were heat treated according to Thermowood® method. Lignin, cellulose, hemicelluloses and extractives in dichloromethane, ethanol and water were determined. Wood extracts were analysed by gas chromatography with mass detection and existing compounds were identified by NIST17 database. Results show that hemicelluloses and cellulose content decreased for both heat-treated woods along the treatment while lignin percentage increased. The analysis of extractives has shown several compounds normally associated to lignin thermal degradation that increased along the treatment. At the same time several compounds associated to carbohydrate thermal degradation were found in all the extracts for both heat-treated woods. These founding have allowed the understanding of the degradation pattern of wood during thermal modification. There was not much difference between afrormosia and duka woods structural compounds behaviour along thermal modification. However, the variation of the amount of extractives along the treatment depended on the species.Repositório Científico do Instituto Politécnico de ViseuEsteves, BrunoAyata, UmitCruz-Lopes, LuísaBrás, IsabelFerreira, JoséDomingos, Idalina2022-08-29T09:35:18Z2022-042022-08-08T14:55:23Z2022-04-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.19/7322eng0718-221Xcv-prod-303062910.4067/s0718-221x2022000100422metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-01-16T15:29:28Zoai:repositorio.ipv.pt:10400.19/7322Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:45:03.963336Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Changes in the content and composition of the extractives in thermally modified tropical hardwoods
title Changes in the content and composition of the extractives in thermally modified tropical hardwoods
spellingShingle Changes in the content and composition of the extractives in thermally modified tropical hardwoods
Esteves, Bruno
Afrormosia
chemical changes
duka
extractives
heat treatment
Pericopsis elata
Tapirira guianensis
title_short Changes in the content and composition of the extractives in thermally modified tropical hardwoods
title_full Changes in the content and composition of the extractives in thermally modified tropical hardwoods
title_fullStr Changes in the content and composition of the extractives in thermally modified tropical hardwoods
title_full_unstemmed Changes in the content and composition of the extractives in thermally modified tropical hardwoods
title_sort Changes in the content and composition of the extractives in thermally modified tropical hardwoods
author Esteves, Bruno
author_facet Esteves, Bruno
Ayata, Umit
Cruz-Lopes, Luísa
Brás, Isabel
Ferreira, José
Domingos, Idalina
author_role author
author2 Ayata, Umit
Cruz-Lopes, Luísa
Brás, Isabel
Ferreira, José
Domingos, Idalina
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório Científico do Instituto Politécnico de Viseu
dc.contributor.author.fl_str_mv Esteves, Bruno
Ayata, Umit
Cruz-Lopes, Luísa
Brás, Isabel
Ferreira, José
Domingos, Idalina
dc.subject.por.fl_str_mv Afrormosia
chemical changes
duka
extractives
heat treatment
Pericopsis elata
Tapirira guianensis
topic Afrormosia
chemical changes
duka
extractives
heat treatment
Pericopsis elata
Tapirira guianensis
description Chemical composition of wood is known to change during thermal treatments. Two species grown in Turkey, afrormosia (Pericopsis elata) and duka (Tapirira guianensis) were heat treated according to Thermowood® method. Lignin, cellulose, hemicelluloses and extractives in dichloromethane, ethanol and water were determined. Wood extracts were analysed by gas chromatography with mass detection and existing compounds were identified by NIST17 database. Results show that hemicelluloses and cellulose content decreased for both heat-treated woods along the treatment while lignin percentage increased. The analysis of extractives has shown several compounds normally associated to lignin thermal degradation that increased along the treatment. At the same time several compounds associated to carbohydrate thermal degradation were found in all the extracts for both heat-treated woods. These founding have allowed the understanding of the degradation pattern of wood during thermal modification. There was not much difference between afrormosia and duka woods structural compounds behaviour along thermal modification. However, the variation of the amount of extractives along the treatment depended on the species.
publishDate 2022
dc.date.none.fl_str_mv 2022-08-29T09:35:18Z
2022-04
2022-08-08T14:55:23Z
2022-04-01T00:00:00Z
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