Characterization of thermally modified short and long rotation teaks and the effects on coatings performance

Abstract: Many wood processing industries use short rotation teak, which has lower quality especially in durability and dimensional stability. Heat treatment is an eco-friendly method to improve dimensional stability and durability of wood. The objectives of the study were to investigate the effects...

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Autores principales:	Pratiwi,Lisa Adina, Darmawan,Wayan, Priadi,Trisna, George,Béatrice, Merlin,André, Gérardin,Christine, Dumarçay,Stéphane, Gérardin,Philippe
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2019
Materias:	Dimensional stability durability heat treatment Tectona grandis weathering.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000200209
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spelling	oai:scielo:S0718-221X20190002002092019-06-04Characterization of thermally modified short and long rotation teaks and the effects on coatings performancePratiwi,Lisa AdinaDarmawan,WayanPriadi,TrisnaGeorge,BéatriceMerlin,AndréGérardin,ChristineDumarçay,StéphaneGérardin,Philippe Dimensional stability durability heat treatment Tectona grandis weathering. Abstract: Many wood processing industries use short rotation teak, which has lower quality especially in durability and dimensional stability. Heat treatment is an eco-friendly method to improve dimensional stability and durability of wood. The objectives of the study were to investigate the effects of thermal modification on chemical composition, colour, dimensional stability and durability as well as coating’s performance after accelerated weathering of short and long rotation teak for exterior utilization. In this study, the samples were heated in oven at 220 °C for 20 h under nitrogen atmosphere. Results showed that independently of growth conditions teak woods underwent hemicelluloses degradation and an increase of lignin content after heat treatment. Extractives contents were lower in short rotation than in long rotation teak, and decreased in all cases after heat treatments. Dimensional stability was considerably improved as indicated by anti-swelling efficiency values of 64,9% and 58,9% for short and long rotation teak, respectively. Heated teak woods were more resistant against Trametes versicolor and the durability of short-rotation teak increased from moderate to very durable. Coatings on heat treated teaks had better bonding quality and better photo-stability when compared to unheated. Heated short rotation teak could be considered for exterior application.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.21 n.2 20192019-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000200209en10.4067/S0718-221X2019005000208
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Dimensional stability durability heat treatment Tectona grandis weathering.
spellingShingle	Dimensional stability durability heat treatment Tectona grandis weathering. Pratiwi,Lisa Adina Darmawan,Wayan Priadi,Trisna George,Béatrice Merlin,André Gérardin,Christine Dumarçay,Stéphane Gérardin,Philippe Characterization of thermally modified short and long rotation teaks and the effects on coatings performance
description	Abstract: Many wood processing industries use short rotation teak, which has lower quality especially in durability and dimensional stability. Heat treatment is an eco-friendly method to improve dimensional stability and durability of wood. The objectives of the study were to investigate the effects of thermal modification on chemical composition, colour, dimensional stability and durability as well as coating’s performance after accelerated weathering of short and long rotation teak for exterior utilization. In this study, the samples were heated in oven at 220 °C for 20 h under nitrogen atmosphere. Results showed that independently of growth conditions teak woods underwent hemicelluloses degradation and an increase of lignin content after heat treatment. Extractives contents were lower in short rotation than in long rotation teak, and decreased in all cases after heat treatments. Dimensional stability was considerably improved as indicated by anti-swelling efficiency values of 64,9% and 58,9% for short and long rotation teak, respectively. Heated teak woods were more resistant against Trametes versicolor and the durability of short-rotation teak increased from moderate to very durable. Coatings on heat treated teaks had better bonding quality and better photo-stability when compared to unheated. Heated short rotation teak could be considered for exterior application.
author	Pratiwi,Lisa Adina Darmawan,Wayan Priadi,Trisna George,Béatrice Merlin,André Gérardin,Christine Dumarçay,Stéphane Gérardin,Philippe
author_facet	Pratiwi,Lisa Adina Darmawan,Wayan Priadi,Trisna George,Béatrice Merlin,André Gérardin,Christine Dumarçay,Stéphane Gérardin,Philippe
author_sort	Pratiwi,Lisa Adina
title	Characterization of thermally modified short and long rotation teaks and the effects on coatings performance
title_short	Characterization of thermally modified short and long rotation teaks and the effects on coatings performance
title_full	Characterization of thermally modified short and long rotation teaks and the effects on coatings performance
title_fullStr	Characterization of thermally modified short and long rotation teaks and the effects on coatings performance
title_full_unstemmed	Characterization of thermally modified short and long rotation teaks and the effects on coatings performance
title_sort	characterization of thermally modified short and long rotation teaks and the effects on coatings performance
publisher	Universidad del Bío-Bío
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000200209
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Characterization of thermally modified short and long rotation teaks and the effects on coatings performance

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