Effects of thermal modification of oak wood upon selected properties of coating systems
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.19/5461 |
Resumo: | Heat treatment processes are usually used in low valued softwoods however there has been an increased use to change the natural colour of more valuable hardwoods without chemicals to be use indoors mainly for parquet floors. In this study, wood samples from oak (Quercus petreae L.) wood were heat treated (ThermoWood method) at 190oC for 2 hours and 212oC for 1 to 2 hours. Untreated and heat treated wood surfaces were coated by two different processes with an UV varnishing system according to manufacturer recommendations. The objective of this study was to investigate some surface properties like adhesion, glossiness, pendulum hardness and color (L*, a*, b*, ΔE, ΔL*, Δa* and Δb*). With heat treatment Lightness decreases and its magnitude is higher for higher temperatures and treating times being lower for double coated wood. There was a slight increase followed by a decrease in redness (lower a*) and a clear decrease in the yellow tone (b*). Total color variation increased with the intensity of the treatment and glossiness decreased (more for single coated wood). The adhesion strength and surface hardness decreased with the heat treatment for both single and double coated wood. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Effects of thermal modification of oak wood upon selected properties of coating systemsHeat treatmentOakGlossinessAdhesionHeat treatment processes are usually used in low valued softwoods however there has been an increased use to change the natural colour of more valuable hardwoods without chemicals to be use indoors mainly for parquet floors. In this study, wood samples from oak (Quercus petreae L.) wood were heat treated (ThermoWood method) at 190oC for 2 hours and 212oC for 1 to 2 hours. Untreated and heat treated wood surfaces were coated by two different processes with an UV varnishing system according to manufacturer recommendations. The objective of this study was to investigate some surface properties like adhesion, glossiness, pendulum hardness and color (L*, a*, b*, ΔE, ΔL*, Δa* and Δb*). With heat treatment Lightness decreases and its magnitude is higher for higher temperatures and treating times being lower for double coated wood. There was a slight increase followed by a decrease in redness (lower a*) and a clear decrease in the yellow tone (b*). Total color variation increased with the intensity of the treatment and glossiness decreased (more for single coated wood). The adhesion strength and surface hardness decreased with the heat treatment for both single and double coated wood.Repositório Científico do Instituto Politécnico de ViseuGurleyen, LeventAyata, UmitEsteves, BrunoGurleyen, TugbaCakicier, Nevzat2019-04-03T09:45:40Z20192019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.19/5461engGurleyen, L., Ayata, U., Esteves, B., Gurleyen, T., and Cakıcıer, N. (2019). "Effects of thermal modification of oak wood upon selected properties of coating systems," BioRes. 14(1), 1838-1849.1930-212610.15376/biores.14.1.1838-1849info: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:RCAAP2023-01-16T15:28:05ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Effects of thermal modification of oak wood upon selected properties of coating systems |
title |
Effects of thermal modification of oak wood upon selected properties of coating systems |
spellingShingle |
Effects of thermal modification of oak wood upon selected properties of coating systems Gurleyen, Levent Heat treatment Oak Glossiness Adhesion |
title_short |
Effects of thermal modification of oak wood upon selected properties of coating systems |
title_full |
Effects of thermal modification of oak wood upon selected properties of coating systems |
title_fullStr |
Effects of thermal modification of oak wood upon selected properties of coating systems |
title_full_unstemmed |
Effects of thermal modification of oak wood upon selected properties of coating systems |
title_sort |
Effects of thermal modification of oak wood upon selected properties of coating systems |
author |
Gurleyen, Levent |
author_facet |
Gurleyen, Levent Ayata, Umit Esteves, Bruno Gurleyen, Tugba Cakicier, Nevzat |
author_role |
author |
author2 |
Ayata, Umit Esteves, Bruno Gurleyen, Tugba Cakicier, Nevzat |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Repositório Científico do Instituto Politécnico de Viseu |
dc.contributor.author.fl_str_mv |
Gurleyen, Levent Ayata, Umit Esteves, Bruno Gurleyen, Tugba Cakicier, Nevzat |
dc.subject.por.fl_str_mv |
Heat treatment Oak Glossiness Adhesion |
topic |
Heat treatment Oak Glossiness Adhesion |
description |
Heat treatment processes are usually used in low valued softwoods however there has been an increased use to change the natural colour of more valuable hardwoods without chemicals to be use indoors mainly for parquet floors. In this study, wood samples from oak (Quercus petreae L.) wood were heat treated (ThermoWood method) at 190oC for 2 hours and 212oC for 1 to 2 hours. Untreated and heat treated wood surfaces were coated by two different processes with an UV varnishing system according to manufacturer recommendations. The objective of this study was to investigate some surface properties like adhesion, glossiness, pendulum hardness and color (L*, a*, b*, ΔE, ΔL*, Δa* and Δb*). With heat treatment Lightness decreases and its magnitude is higher for higher temperatures and treating times being lower for double coated wood. There was a slight increase followed by a decrease in redness (lower a*) and a clear decrease in the yellow tone (b*). Total color variation increased with the intensity of the treatment and glossiness decreased (more for single coated wood). The adhesion strength and surface hardness decreased with the heat treatment for both single and double coated wood. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-04-03T09:45:40Z 2019 2019-01-01T00:00:00Z |
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/10400.19/5461 |
url |
http://hdl.handle.net/10400.19/5461 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Gurleyen, L., Ayata, U., Esteves, B., Gurleyen, T., and Cakıcıer, N. (2019). "Effects of thermal modification of oak wood upon selected properties of coating systems," BioRes. 14(1), 1838-1849. 1930-2126 10.15376/biores.14.1.1838-1849 |
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.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) |
repository.name.fl_str_mv |
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1777301969988222976 |