Wettability, Shrinkage and Color Changes of Araucaria angustifolia After Heating Treatment
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , |
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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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 |
_version_ |
1754212659679461376 |