Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat Treatment

Detalhes bibliográficos
Autor(a) principal: Esteves, Bruno M.
Data de Publicação: 2021
Outros Autores: Ferreira, Helena, Viana, Hélder, Ferreira, José, Domingos, Idalina J., Cruz-Lopes, Luísa, Jones, Dennis, Nunes, Lina
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.3/6089
Resumo: The introduction of new species in forest management must be undertaken with a degree of care, to help prevent the spread of invasive species. However, new species with higher profitability are needed to increase forest products value and the resilience of rural populations. Paulownia tomentosa has an extremely fast growth. The objective and novelty of this work was to study the potential use of young Paulownia trees grown in Portugal by using heat treatment to improve its properties, thereby allowing higher value applications of the wood. The average chemical composition of untreated and heat-treated wood was determined. The extractive content was determined by successive Soxhlet extraction with dichloromethane (DCM), ethanol and water as solvents. The composition of lipophilic extracts was performed by injection in GC-MS with mass detection. Insoluble and soluble lignin, holocellulose and α-cellulose were also determined. Physical (density and water absorption and dimensional stability) and mechanical properties (bending strength and bending stiffness) and termite resistance was also determined. Results showed that extractive content increased in all solvents, lignin and α-cellulose also increased and hemicelluloses decreased. Compounds derived from the thermal degradation of lignin were found in heat-treated wood extractions. Dimensional stability improved but there was a decrease in mechanical properties. Resistance against termites was better for untreated wood than for heat-treated wood, possibly due to the thermal degradation of some toxic extractives.
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spelling Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat TreatmentChemical CompositionHeat TreatmentMechanical PropertiesTermitesPaulownia tomentosaThe introduction of new species in forest management must be undertaken with a degree of care, to help prevent the spread of invasive species. However, new species with higher profitability are needed to increase forest products value and the resilience of rural populations. Paulownia tomentosa has an extremely fast growth. The objective and novelty of this work was to study the potential use of young Paulownia trees grown in Portugal by using heat treatment to improve its properties, thereby allowing higher value applications of the wood. The average chemical composition of untreated and heat-treated wood was determined. The extractive content was determined by successive Soxhlet extraction with dichloromethane (DCM), ethanol and water as solvents. The composition of lipophilic extracts was performed by injection in GC-MS with mass detection. Insoluble and soluble lignin, holocellulose and α-cellulose were also determined. Physical (density and water absorption and dimensional stability) and mechanical properties (bending strength and bending stiffness) and termite resistance was also determined. Results showed that extractive content increased in all solvents, lignin and α-cellulose also increased and hemicelluloses decreased. Compounds derived from the thermal degradation of lignin were found in heat-treated wood extractions. Dimensional stability improved but there was a decrease in mechanical properties. Resistance against termites was better for untreated wood than for heat-treated wood, possibly due to the thermal degradation of some toxic extractives.This work was funded by Caixa Geral de Depósitos and the Polytechnic of Viseu through the project VALPT (PROJ/IPV/ID&I/003) and FCT-Foundation for Science and Technology, I.P., through CERNAS Research Centre, within the scope of the project UIDB/00681/2020 and through CITAB Research Centre by Project UIDB/04033/2020. Additional support to D.J. through the project "Advanced research supporting the forestry and wood-processing sector's adaptation to global change and the 4th industrial revolution", OP RDE (Grant No. CZ.02.1.01/0.0/0.0/16_019/0000803) and CT WOOD-a center of excellence at Lulea University of Technology supported by the Swedish wood industry-is also gratefully acknowledged.MDPIRepositório da Universidade dos AçoresEsteves, Bruno M.Ferreira, HelenaViana, HélderFerreira, JoséDomingos, Idalina J.Cruz-Lopes, LuísaJones, DennisNunes, Lina2021-10-12T16:40:11Z2021-082021-08-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.3/6089engEsteves, B., Ferreira, H., Viana, H., Ferreira, J., Domingos, I., Cruz-Lopes, L., Jones, D. & Nunes, L. (2021). Termite resistance, chemical and mechanical characterization of Paulownia tomentosa wood before and after heat treatment. "Forests", 12(8): 1114. DOI:10.3390/f1208111410.3390/f120811141999-4907000690555100001info: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:RCAAP2022-12-20T14:34:27ZPortal AgregadorONG
dc.title.none.fl_str_mv Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat Treatment
title Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat Treatment
spellingShingle Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat Treatment
Esteves, Bruno M.
Chemical Composition
Heat Treatment
Mechanical Properties
Termites
Paulownia tomentosa
title_short Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat Treatment
title_full Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat Treatment
title_fullStr Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat Treatment
title_full_unstemmed Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat Treatment
title_sort Termite Resistance, Chemical and Mechanical Characterization of Paulownia tomentosa Wood before and after Heat Treatment
author Esteves, Bruno M.
author_facet Esteves, Bruno M.
Ferreira, Helena
Viana, Hélder
Ferreira, José
Domingos, Idalina J.
Cruz-Lopes, Luísa
Jones, Dennis
Nunes, Lina
author_role author
author2 Ferreira, Helena
Viana, Hélder
Ferreira, José
Domingos, Idalina J.
Cruz-Lopes, Luísa
Jones, Dennis
Nunes, Lina
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade dos Açores
dc.contributor.author.fl_str_mv Esteves, Bruno M.
Ferreira, Helena
Viana, Hélder
Ferreira, José
Domingos, Idalina J.
Cruz-Lopes, Luísa
Jones, Dennis
Nunes, Lina
dc.subject.por.fl_str_mv Chemical Composition
Heat Treatment
Mechanical Properties
Termites
Paulownia tomentosa
topic Chemical Composition
Heat Treatment
Mechanical Properties
Termites
Paulownia tomentosa
description The introduction of new species in forest management must be undertaken with a degree of care, to help prevent the spread of invasive species. However, new species with higher profitability are needed to increase forest products value and the resilience of rural populations. Paulownia tomentosa has an extremely fast growth. The objective and novelty of this work was to study the potential use of young Paulownia trees grown in Portugal by using heat treatment to improve its properties, thereby allowing higher value applications of the wood. The average chemical composition of untreated and heat-treated wood was determined. The extractive content was determined by successive Soxhlet extraction with dichloromethane (DCM), ethanol and water as solvents. The composition of lipophilic extracts was performed by injection in GC-MS with mass detection. Insoluble and soluble lignin, holocellulose and α-cellulose were also determined. Physical (density and water absorption and dimensional stability) and mechanical properties (bending strength and bending stiffness) and termite resistance was also determined. Results showed that extractive content increased in all solvents, lignin and α-cellulose also increased and hemicelluloses decreased. Compounds derived from the thermal degradation of lignin were found in heat-treated wood extractions. Dimensional stability improved but there was a decrease in mechanical properties. Resistance against termites was better for untreated wood than for heat-treated wood, possibly due to the thermal degradation of some toxic extractives.
publishDate 2021
dc.date.none.fl_str_mv 2021-10-12T16:40:11Z
2021-08
2021-08-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.3/6089
url http://hdl.handle.net/10400.3/6089
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Esteves, B., Ferreira, H., Viana, H., Ferreira, J., Domingos, I., Cruz-Lopes, L., Jones, D. & Nunes, L. (2021). Termite resistance, chemical and mechanical characterization of Paulownia tomentosa wood before and after heat treatment. "Forests", 12(8): 1114. DOI:10.3390/f12081114
10.3390/f12081114
1999-4907
000690555100001
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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repository.mail.fl_str_mv
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