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Thermal modification’s influence on the color of Tectona grandis L.f. sapwood to resemble heartwood

The commercial value of teak wood is associated with its heartwood, which has a naturally darker color than sapwood. To reduce this color disparity, thermal modification can be used to homogenize the color between sapwood and heartwood by minimizing color differences. This research aimed to assess t...

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Published in:Bioresources 2024-11, Vol.19 (4), p.9085-9100
Main Authors: Cruz, Ariany Mendes, Albuês, Theonizi Angélica Silva, Maria, Daiane de Moura Borges, Madi, João Paulo Sardo, Ferreira, Jéssica Sabrina da Silva, Barros, Jr, Udson de Oliveira, Oliveira, Aylson Costa, Batista, Djeison Cesar, Pereira, Bárbara Luísa Corradi
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container_issue 4
container_start_page 9085
container_title Bioresources
container_volume 19
creator Cruz, Ariany Mendes
Albuês, Theonizi Angélica Silva
Maria, Daiane de Moura Borges
Madi, João Paulo Sardo
Ferreira, Jéssica Sabrina da Silva
Barros, Jr, Udson de Oliveira
Oliveira, Aylson Costa
Batista, Djeison Cesar
Pereira, Bárbara Luísa Corradi
description The commercial value of teak wood is associated with its heartwood, which has a naturally darker color than sapwood. To reduce this color disparity, thermal modification can be used to homogenize the color between sapwood and heartwood by minimizing color differences. This research aimed to assess the effectiveness of thermal modification in making the color of teak sapwood similar to that of heartwood. Thermal modification was carried out at 160, 180, 200, and 220 °C for 150 min. Thermal modification of teak sapwood at 180 °C ensured greater color similarity to the heartwood of a fast-growing 16-year-old plantation. The material darkened with increasing process temperature. There was a change in the content of soluble substances, and hot water extraction had greater correlations with hue angle, lightness, and yellowness. Thermal modification also reduced the number of hydroxyl groups and improved the wood’s thermal stability.
doi_str_mv 10.15376/biores.19.4.9085-9100
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source Publicly Available Content Database (Proquest) (PQ_SDU_P3)
subjects cielab
Color
extractives
fast-growing plantation
Forests
Fourier transforms
Hardwoods
heartwood
Hydroxyl groups
Mechanical properties
Plantations
teak wood
Temperature
Thermal stability
Wood
title Thermal modification’s influence on the color of Tectona grandis L.f. sapwood to resemble heartwood
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