Chemical, Mechanical, Thermal, and Colorimetric Features of the Thermally Treated Eucalyptus grandis Wood Planted in Brazil

Abstract

This article aimed at thermally treating and charactering the Eucalyptus grandis wood under three different temperatures. For this, pristine eucalypt samples were treated by heating in a laboratory oven at 160 °C, 200 °C and 240 °C, always for 2 h. Treatment parameters (based on weight percentage loss and specific gravity), as well as mechanical (by hardness tests), chemical (by infrared spectroscopy), thermal (by thermogravimetry), and colorimetric (by CIELab method) features were evaluated. Compared to the pristine ones, the treated woods have there was a drop in apparent density at 12 % and consecutively greater thermal stability which is probably related to a previous partial degradation of some major amorphous components (namely cellulose, hemicellulose and lignin), as suggested by the treatment parameters and infrared spectra. Besides of that, the higher the temperature treatment, the higher the loss in surface hardness and the higher the colour darkening.

Study of the Influence of Heat Treatment on OSB Panels Produced with Eucalyptus Wood in Different Layer Compositions

“…The adhesive cure of approximately 100 °C obtained in the DSC is compatible with the temperature used in several papers [8,24,32], which reported a typical temperature and average pressing time of 100 °C and 10 min for the production of OSB using the twocomponent vegetable polyurethane adhesive derived from castor oil. In view of this, an isotherm was initially performed at 100 °C to check the adhesive curing behavior, where The values found are compatible with those published in the research by Schulz et al [48], which heat-treated and characterized Eucalyptus grandis wood at three different temperatures (i.e., 160 • C, 200 • C, and 240 • C). Regarding the thermogravimetric curves (i.e., TGA and DTG) obtained, it was verified that these can be divided into three regions, where region I is related to moisture loss (from 20 • C to 100 • C), region II is related to the degradation in hemicellulose and cellulose (from 160 • C to 480 • C), and region III is related to the degradation in cellulose and lignin (from 450 • C to 600 • C).…”

Dimensional Stability and Mechanical Properties of Citric Acid Impregnated Samama Wood (Anthocephalus macrophyllus (Roxb) Havil) at High Curing Temperatures

“…The combination of water removal and degradation of chemical components resulted in weight reduction in the heat-treated wood (Cahyono et al, 2022;Dos Santos et al, 2014;Kim et al, 2018;Schulz et al, 2021). This mechanism tended to affect the density after heat treatments.…”

Evaluation of the Basic Properties for the Korean Major Domestic Wood Species

“…Specific gravity KS F 2198 Ahn et al, 2021;Darwis et al, 2023;Hadi et al, 2019Hadi et al, , 2022Iswanto et al, 2017;Kang et al, 2023;Kim, 2018, 2019;Maulana et al, 2017;Nawawi et al, 2023;Özcan and Korkmaz, 2019;Pari et al, 2023;Park et al, 2015aPark et al, , 2015bPark et al, , 2016Park et al, , 2018Priadi et al, 2021;Savero et al, 2020;Schulz et al, 2021;Seta et al, 2023;Trisatya et al, 2023 Shrinkage KS F 2203…”

“…Bending strength KS F 2208 Cha et al, 2022;Darwis et al, 2023;Fujimoto et al, 2021;Hadi et al, 2019Hadi et al, , 2022Iswanto et al, 2017;Kang et al, 2023;Kim et al, 2020;Lee and Jang, 2023;Lee and Oh, 2023;Liu et al, 2022;Maulana et al, 2017;Oh, 2021Oh, , 2022Özcan and Korkmaz, 2019;Park et al, 2015bPark et al, , 2016Qi et al, 2019;Savero et al, 2020;Schulz et al, 2021;Song and Kim, 2023;Sumardi et al, 2022;Trisatya et Huh et al, 2022;Iswanto et al, 2021;Jain et al, 2022;Jung et al, 2019Jung et al, , 2021Jung et al, , 2022Manurung et al, 2019;Maulana et al, 2021;Maulina et al, 2020;Min et al, 2019;Purnawati et al, 2018;Seo et al, 2020 Extractives ASTM E 1690…”