Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment

Detalhes bibliográficos
Autor(a) principal: Oliveira,Rodrigo Marques de
Data de Publicação: 2010
Outros Autores: Brisolari,André, Sales,Almir, Gonçalves,Débora
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392010000300012
Resumo: The effects of thermal treatment on the wettability and shrink resistance of Araucaria angustifolia (Parana pine) were studied from 20 to 200 °C. The contact angles of water droplets on untreated and heat-treated samples were measured by the sessile drop method in the grain of heartwood and sapwood cut in the radial, longitudinal, and tangential directions. A significant increase of the contact angles was verified for the samples from room temperature to 120 °C, in particular in the radial and tangential directions; at higher temperatures, the contact angles assumed almost constant values. From 120 to 200 °C, the sapwood of Araucaria angustifolia showed better dimensional stability and lower thermal resistance when compared to the heartwood. Variations of color were also studied by using the CIELab system, which showed to be capable of accurately distinguishing samples treated at different temperatures.
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spelling Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating TreatmentAraucaria angustifoliawettabilitywoodcontact anglessurface modificationsThe effects of thermal treatment on the wettability and shrink resistance of Araucaria angustifolia (Parana pine) were studied from 20 to 200 °C. The contact angles of water droplets on untreated and heat-treated samples were measured by the sessile drop method in the grain of heartwood and sapwood cut in the radial, longitudinal, and tangential directions. A significant increase of the contact angles was verified for the samples from room temperature to 120 °C, in particular in the radial and tangential directions; at higher temperatures, the contact angles assumed almost constant values. From 120 to 200 °C, the sapwood of Araucaria angustifolia showed better dimensional stability and lower thermal resistance when compared to the heartwood. Variations of color were also studied by using the CIELab system, which showed to be capable of accurately distinguishing samples treated at different temperatures.ABM, ABC, ABPol2010-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392010000300012Materials Research v.13 n.3 2010reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392010000300012info:eu-repo/semantics/openAccessOliveira,Rodrigo Marques deBrisolari,AndréSales,AlmirGonçalves,Déboraeng2010-10-22T00:00:00Zoai:scielo:S1516-14392010000300012Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2010-10-22T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
title Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
spellingShingle Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
Oliveira,Rodrigo Marques de
Araucaria angustifolia
wettability
wood
contact angles
surface modifications
title_short Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
title_full Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
title_fullStr Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
title_full_unstemmed Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
title_sort Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
author Oliveira,Rodrigo Marques de
author_facet Oliveira,Rodrigo Marques de
Brisolari,André
Sales,Almir
Gonçalves,Débora
author_role author
author2 Brisolari,André
Sales,Almir
Gonçalves,Débora
author2_role author
author
author
dc.contributor.author.fl_str_mv Oliveira,Rodrigo Marques de
Brisolari,André
Sales,Almir
Gonçalves,Débora
dc.subject.por.fl_str_mv Araucaria angustifolia
wettability
wood
contact angles
surface modifications
topic Araucaria angustifolia
wettability
wood
contact angles
surface modifications
description The effects of thermal treatment on the wettability and shrink resistance of Araucaria angustifolia (Parana pine) were studied from 20 to 200 °C. The contact angles of water droplets on untreated and heat-treated samples were measured by the sessile drop method in the grain of heartwood and sapwood cut in the radial, longitudinal, and tangential directions. A significant increase of the contact angles was verified for the samples from room temperature to 120 °C, in particular in the radial and tangential directions; at higher temperatures, the contact angles assumed almost constant values. From 120 to 200 °C, the sapwood of Araucaria angustifolia showed better dimensional stability and lower thermal resistance when compared to the heartwood. Variations of color were also studied by using the CIELab system, which showed to be capable of accurately distinguishing samples treated at different temperatures.
publishDate 2010
dc.date.none.fl_str_mv 2010-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392010000300012
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392010000300012
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392010000300012
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.13 n.3 2010
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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