Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment

Detalhes bibliográficos
Autor(a) principal: Modes, Karina Soares
Data de Publicação: 2016
Outros Autores: Santini, Elio José, Vivian, Magnos Alan
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/14198
Resumo: This study aimed to investigate the effect of the thermal treatment technique under two conditions - autoclavecombined with electric oven and electric oven only - on the hygroscopic properties of wood from Pinus taeda L. and Eucalyptus grandis W. Hill ex Maiden, comparing them with results obtained for untreated wood. Three trees at age 25 years were sampled, with boards being removed at DBH level in order to make specimens 2.5 x 2.5 x 5.0 cm in size in the radial, tangential and axial direction respectively. In the combined treatment, specimens were subjected to thermal treatment in an autoclave set at 130°C/± 3°C and kgf/ cm² pressure for 3 hours, then to a conditioning period, followed by heat in an electric oven set at 160°C/±1°C for the same time. Properties being evaluated included water absorption rate, volumetric swelling, water repellency effectiveness and anti-swelling efficiency. Results revealed that the thermal treatments being adopted were effective in reducing hygroscopicity and in increasing the dimensional stability of both species, revealing also that the combined autoclave and electric oven treatment provides best results. 
id UFLA_3fd2b785ce9c619a4f93d0086effd0f3
oai_identifier_str oai:localhost:1/14198
network_acronym_str UFLA
network_name_str Repositório Institucional da UFLA
repository_id_str
spelling Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatmentHigroscopicidade da madeira de Eucalyptus grandis e Pinus taeda tratadas termicamenteWood - Thermal treatmentEucalyptusPinewoodHygroscopic propertiesTermorretificaçãoMadeira - TermorretificaçãoEucaliptoPinusPropriedades higroscópicasThis study aimed to investigate the effect of the thermal treatment technique under two conditions - autoclavecombined with electric oven and electric oven only - on the hygroscopic properties of wood from Pinus taeda L. and Eucalyptus grandis W. Hill ex Maiden, comparing them with results obtained for untreated wood. Three trees at age 25 years were sampled, with boards being removed at DBH level in order to make specimens 2.5 x 2.5 x 5.0 cm in size in the radial, tangential and axial direction respectively. In the combined treatment, specimens were subjected to thermal treatment in an autoclave set at 130°C/± 3°C and kgf/ cm² pressure for 3 hours, then to a conditioning period, followed by heat in an electric oven set at 160°C/±1°C for the same time. Properties being evaluated included water absorption rate, volumetric swelling, water repellency effectiveness and anti-swelling efficiency. Results revealed that the thermal treatments being adopted were effective in reducing hygroscopicity and in increasing the dimensional stability of both species, revealing also that the combined autoclave and electric oven treatment provides best results. A presente pesquisa objetivou investigar o efeito da técnica de retificação térmica, empregada sob duas condições de tratamento: combinação de autoclave e estufa elétrica e uso de estufa elétrica nas propriedades higroscópicas das madeiras de Pinus taeda L. e Eucalyptus grandis W. Hill ex Maiden, comparando-as com os resultados obtidos para a madeira sem tratamento. Foram amostradas três árvores com 25 anos, e destas foram extraídas no DAP uma prancha para a confecção de corpos de prova de 2,5 x 2,5 x 5,0 cm, com orientação na direção radial, tangencial e axial, respectivamente. No tratamento de combinação, as peças foram submetidas a termorretificação em autoclave a 130ºC/±3°C e pressão de 2 kgf/cm², por 3 horas e, após um período de condicionamento, submetidas ao calor em estufa elétrica a 160°C/±1°C, pelo mesmo período. As propriedades avaliadas consistiram na taxa de absorção de água, inchamento volumétrico, efetividade de repelência à água e eficiência antiinchamento. Os resultados obtidos indicaram que os tratamentos térmicos empregados, foram eficientes na redução da higroscopicidade e aumento da estabilidade dimensional de ambas as espécies, sendo que a combinação autoclave e estufa elétrica fornece os melhores resultados.Universidade Federal de Lavras (UFLA)2016-04-052017-08-01T20:13:53Z2017-08-01T20:13:53Z2017-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfMODES, K. S.; SANTINI, E. J.; VIVIAN, M. A. Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment. CERNE, Lavras, v. 19, n. 1, p. 19-25, jan./mar. 2013.http://repositorio.ufla.br/jspui/handle/1/141982317-63420104-7760reponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttp://www.cerne.ufla.br/site/index.php/CERNE/article/view/872/651Copyright (c) 2016 CERNEhttp://creativecommons.org/licenses/by/4.0/Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccessModes, Karina SoaresSantini, Elio JoséVivian, Magnos Alan2021-06-26T23:04:28Zoai:localhost:1/14198Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-06-26T23:04:28Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment
Higroscopicidade da madeira de Eucalyptus grandis e Pinus taeda tratadas termicamente
title Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment
spellingShingle Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment
Modes, Karina Soares
Wood - Thermal treatment
Eucalyptus
Pinewood
Hygroscopic properties
Termorretificação
Madeira - Termorretificação
Eucalipto
Pinus
Propriedades higroscópicas
title_short Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment
title_full Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment
title_fullStr Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment
title_full_unstemmed Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment
title_sort Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment
author Modes, Karina Soares
author_facet Modes, Karina Soares
Santini, Elio José
Vivian, Magnos Alan
author_role author
author2 Santini, Elio José
Vivian, Magnos Alan
author2_role author
author
dc.contributor.author.fl_str_mv Modes, Karina Soares
Santini, Elio José
Vivian, Magnos Alan
dc.subject.por.fl_str_mv Wood - Thermal treatment
Eucalyptus
Pinewood
Hygroscopic properties
Termorretificação
Madeira - Termorretificação
Eucalipto
Pinus
Propriedades higroscópicas
topic Wood - Thermal treatment
Eucalyptus
Pinewood
Hygroscopic properties
Termorretificação
Madeira - Termorretificação
Eucalipto
Pinus
Propriedades higroscópicas
description This study aimed to investigate the effect of the thermal treatment technique under two conditions - autoclavecombined with electric oven and electric oven only - on the hygroscopic properties of wood from Pinus taeda L. and Eucalyptus grandis W. Hill ex Maiden, comparing them with results obtained for untreated wood. Three trees at age 25 years were sampled, with boards being removed at DBH level in order to make specimens 2.5 x 2.5 x 5.0 cm in size in the radial, tangential and axial direction respectively. In the combined treatment, specimens were subjected to thermal treatment in an autoclave set at 130°C/± 3°C and kgf/ cm² pressure for 3 hours, then to a conditioning period, followed by heat in an electric oven set at 160°C/±1°C for the same time. Properties being evaluated included water absorption rate, volumetric swelling, water repellency effectiveness and anti-swelling efficiency. Results revealed that the thermal treatments being adopted were effective in reducing hygroscopicity and in increasing the dimensional stability of both species, revealing also that the combined autoclave and electric oven treatment provides best results. 
publishDate 2016
dc.date.none.fl_str_mv 2016-04-05
2017-08-01T20:13:53Z
2017-08-01T20:13:53Z
2017-08-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv MODES, K. S.; SANTINI, E. J.; VIVIAN, M. A. Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment. CERNE, Lavras, v. 19, n. 1, p. 19-25, jan./mar. 2013.
http://repositorio.ufla.br/jspui/handle/1/14198
identifier_str_mv MODES, K. S.; SANTINI, E. J.; VIVIAN, M. A. Hygroscopicity of wood from Eucalyptus grandis and Pinus taeda subjected to thermal treatment. CERNE, Lavras, v. 19, n. 1, p. 19-25, jan./mar. 2013.
url http://repositorio.ufla.br/jspui/handle/1/14198
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://www.cerne.ufla.br/site/index.php/CERNE/article/view/872/651
dc.rights.driver.fl_str_mv Copyright (c) 2016 CERNE
http://creativecommons.org/licenses/by/4.0/
Attribution 4.0 International
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2016 CERNE
http://creativecommons.org/licenses/by/4.0/
Attribution 4.0 International
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Lavras (UFLA)
publisher.none.fl_str_mv Universidade Federal de Lavras (UFLA)
dc.source.none.fl_str_mv 2317-6342
0104-7760
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
_version_ 1807835109002313728

Registros relacionados