Properties of thermally modified teakwood

Abstract: Thermal modification is a treatment that seeks to improve the properties of wood and reduce the heterogeneity in its color. The objective of this work was to evaluate the effect of thermal treatment on the anatomical, chemical, physical, mechanical, colorimetric, and thermal stability prop...

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Autores principales:	Lengowski,Elaine Cristina, Bonfatti Júnior,Eraldo Antonio, Nisgoski,Silvana, Bolzon de Muñiz,Graciela Inês, Klock,Umberto
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2021
Materias:	Colorimetry cell wall thickness thermogravimetry Tectona grandis wood properties wood mechanical properties wood hygroscopicity wood modification
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2021000100410
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spelling	oai:scielo:S0718-221X20210001004102021-05-30Properties of thermally modified teakwoodLengowski,Elaine CristinaBonfatti Júnior,Eraldo AntonioNisgoski,SilvanaBolzon de Muñiz,Graciela InêsKlock,Umberto Colorimetry cell wall thickness thermogravimetry Tectona grandis wood properties wood mechanical properties wood hygroscopicity wood modification Abstract: Thermal modification is a treatment that seeks to improve the properties of wood and reduce the heterogeneity in its color. The objective of this work was to evaluate the effect of thermal treatment on the anatomical, chemical, physical, mechanical, colorimetric, and thermal stability properties of teakwood. For this, teakwood samples were treated by an industrial autoclave at final cycle temperature of 160 ºC. The reduction of cell wall thickness, the formation of cross-fissures and the crystallization of the wax inside the pores were observed in the anatomical structure. Chemically, the extractives evaporated and the polysaccharides ruptured, of which hemicellulose was the most affected. The heat treatment promoted lower equilibrium moisture, reducing the hygroscopicity and improving the dimensional stability of the wood. Considering the mechanical properties, the rupture modulus and the longitudinal and tangential hardness decreased after the heat treatment. The color of the wood changed significantly, from pink to dark brown. The treated wood had higher thermal stability, with greater weight loss at higher temperatures than the untreated wood.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.23 20212021-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2021000100410en10.4067/s0718-221x2021000100410
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Colorimetry cell wall thickness thermogravimetry Tectona grandis wood properties wood mechanical properties wood hygroscopicity wood modification
spellingShingle	Colorimetry cell wall thickness thermogravimetry Tectona grandis wood properties wood mechanical properties wood hygroscopicity wood modification Lengowski,Elaine Cristina Bonfatti Júnior,Eraldo Antonio Nisgoski,Silvana Bolzon de Muñiz,Graciela Inês Klock,Umberto Properties of thermally modified teakwood
description	Abstract: Thermal modification is a treatment that seeks to improve the properties of wood and reduce the heterogeneity in its color. The objective of this work was to evaluate the effect of thermal treatment on the anatomical, chemical, physical, mechanical, colorimetric, and thermal stability properties of teakwood. For this, teakwood samples were treated by an industrial autoclave at final cycle temperature of 160 ºC. The reduction of cell wall thickness, the formation of cross-fissures and the crystallization of the wax inside the pores were observed in the anatomical structure. Chemically, the extractives evaporated and the polysaccharides ruptured, of which hemicellulose was the most affected. The heat treatment promoted lower equilibrium moisture, reducing the hygroscopicity and improving the dimensional stability of the wood. Considering the mechanical properties, the rupture modulus and the longitudinal and tangential hardness decreased after the heat treatment. The color of the wood changed significantly, from pink to dark brown. The treated wood had higher thermal stability, with greater weight loss at higher temperatures than the untreated wood.
author	Lengowski,Elaine Cristina Bonfatti Júnior,Eraldo Antonio Nisgoski,Silvana Bolzon de Muñiz,Graciela Inês Klock,Umberto
author_facet	Lengowski,Elaine Cristina Bonfatti Júnior,Eraldo Antonio Nisgoski,Silvana Bolzon de Muñiz,Graciela Inês Klock,Umberto
author_sort	Lengowski,Elaine Cristina
title	Properties of thermally modified teakwood
title_short	Properties of thermally modified teakwood
title_full	Properties of thermally modified teakwood
title_fullStr	Properties of thermally modified teakwood
title_full_unstemmed	Properties of thermally modified teakwood
title_sort	properties of thermally modified teakwood
publisher	Universidad del Bío-Bío
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2021000100410
work_keys_str_mv	AT lengowskielainecristina propertiesofthermallymodifiedteakwood AT bonfattijunioreraldoantonio propertiesofthermallymodifiedteakwood AT nisgoskisilvana propertiesofthermallymodifiedteakwood AT bolzondemunizgracielaines propertiesofthermallymodifiedteakwood AT klockumberto propertiesofthermallymodifiedteakwood
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Properties of thermally modified teakwood

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