The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.

Detalhes bibliográficos
Autor(a) principal: Esteves, Bruno
Data de Publicação: 2022
Outros Autores: Cruz-Lopes, Luísa, Viana, Helder Filipe dos Santos, Ferreira, José, Domingos, Idalina, Nunes, Leonel J. R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.19/7516
Resumo: Forests in Portugal are highly dependent on a short number of wood species, and new species with higher profitability are needed. The Paulownia species has generated great interest due to its fast-growing and relatively good wood properties. However, environmental factors have shown that Paulownia grows differently in each case. This study intends to determine the properties of young Paulownia trees from Portuguese plantations to determine the best age to cut the trees according to their use. The chemical composition (extractives in dichloromethane, ethanol and water, lignin, α-cellulose, and hemicelluloses), heating value, elemental analysis (CHNO), inorganic elements and thermogravimetric analyses (TGA), and the most important mechanical and physical properties (density, MOE, bending strength, water absorption equilibrium, moisture content, and dimensional changes) were determined for 1-, 3-, and 5-year-old trees. The results show that, chemically, the extractives increased while hemicelluloses decreased with age, and no trend was found for lignin and α-cellulose. The physical and mechanical properties increased with age, except for the MOE and bending strength. The 5-year-old samples presented the best features for pellet production, namely, calorific power, elemental composition CHNO and sulfur, and inorganic elements.
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spelling The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.agechemical compositionelemental compositionmechanical propertiesPaulownia tomentosaphysical propertiesForests in Portugal are highly dependent on a short number of wood species, and new species with higher profitability are needed. The Paulownia species has generated great interest due to its fast-growing and relatively good wood properties. However, environmental factors have shown that Paulownia grows differently in each case. This study intends to determine the properties of young Paulownia trees from Portuguese plantations to determine the best age to cut the trees according to their use. The chemical composition (extractives in dichloromethane, ethanol and water, lignin, α-cellulose, and hemicelluloses), heating value, elemental analysis (CHNO), inorganic elements and thermogravimetric analyses (TGA), and the most important mechanical and physical properties (density, MOE, bending strength, water absorption equilibrium, moisture content, and dimensional changes) were determined for 1-, 3-, and 5-year-old trees. The results show that, chemically, the extractives increased while hemicelluloses decreased with age, and no trend was found for lignin and α-cellulose. The physical and mechanical properties increased with age, except for the MOE and bending strength. The 5-year-old samples presented the best features for pellet production, namely, calorific power, elemental composition CHNO and sulfur, and inorganic elements.Repositório Científico do Instituto Politécnico de ViseuEsteves, BrunoCruz-Lopes, LuísaViana, Helder Filipe dos SantosFerreira, JoséDomingos, IdalinaNunes, Leonel J. R.2023-01-09T11:29:05Z2022-04-292023-01-05T09:55:33Z2022-04-29T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.19/7516engcv-prod-299882410.3390/f13050700info: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:RCAAP2023-01-16T15:29:38Zoai:repositorio.ipv.pt:10400.19/7516Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:45:13.904898Repositório 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 The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.
title The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.
spellingShingle The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.
Esteves, Bruno
age
chemical composition
elemental composition
mechanical properties
Paulownia tomentosa
physical properties
title_short The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.
title_full The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.
title_fullStr The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.
title_full_unstemmed The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.
title_sort The Influence of Age on the Wood Properties of Paulownia tomentosa (Thunb.) Steud.
author Esteves, Bruno
author_facet Esteves, Bruno
Cruz-Lopes, Luísa
Viana, Helder Filipe dos Santos
Ferreira, José
Domingos, Idalina
Nunes, Leonel J. R.
author_role author
author2 Cruz-Lopes, Luísa
Viana, Helder Filipe dos Santos
Ferreira, José
Domingos, Idalina
Nunes, Leonel J. R.
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
Cruz-Lopes, Luísa
Viana, Helder Filipe dos Santos
Ferreira, José
Domingos, Idalina
Nunes, Leonel J. R.
dc.subject.por.fl_str_mv age
chemical composition
elemental composition
mechanical properties
Paulownia tomentosa
physical properties
topic age
chemical composition
elemental composition
mechanical properties
Paulownia tomentosa
physical properties
description Forests in Portugal are highly dependent on a short number of wood species, and new species with higher profitability are needed. The Paulownia species has generated great interest due to its fast-growing and relatively good wood properties. However, environmental factors have shown that Paulownia grows differently in each case. This study intends to determine the properties of young Paulownia trees from Portuguese plantations to determine the best age to cut the trees according to their use. The chemical composition (extractives in dichloromethane, ethanol and water, lignin, α-cellulose, and hemicelluloses), heating value, elemental analysis (CHNO), inorganic elements and thermogravimetric analyses (TGA), and the most important mechanical and physical properties (density, MOE, bending strength, water absorption equilibrium, moisture content, and dimensional changes) were determined for 1-, 3-, and 5-year-old trees. The results show that, chemically, the extractives increased while hemicelluloses decreased with age, and no trend was found for lignin and α-cellulose. The physical and mechanical properties increased with age, except for the MOE and bending strength. The 5-year-old samples presented the best features for pellet production, namely, calorific power, elemental composition CHNO and sulfur, and inorganic elements.
publishDate 2022
dc.date.none.fl_str_mv 2022-04-29
2022-04-29T00:00:00Z
2023-01-09T11:29:05Z
2023-01-05T09:55:33Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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url http://hdl.handle.net/10400.19/7516
dc.language.iso.fl_str_mv eng
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