Characterization of Acrocarpus fraxinifolius wood submitted to heat treatment

IF 1.2 4区农林科学 Q3 MATERIALS SCIENCE, PAPER & WOOD

Maderas-ciencia Y Tecnologia Pub Date : 2022-10-01 DOI:10.4067/s0718-221x2022000100454

Carolina A. Barros Oliveira, K. A. de Oliveira, Vinicius Borges de Moura Aquino, A. Christoforo, J. C. Molina

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Abstract

Aiming to provide greater visibility for the wood species Acrocarpus fraxinifolius , the present study sought to analyze the influence of heat treatment on an industrial scale applied to wood species, also popularly known as Indian cedar. The heat treatment was carried out in an autoclave, with temperature and pressure control, and with saturated steam injection, for temperatures 155 ºC, 165 ºC, 175 ºC, and 185 ºC. Physical, chemical, and mechanical tests were carried out for the analyzed wood. The content of holocellulose and total lignin decreased, while the content of extractives showed a substantial increase. The density increased after the heat treatment, however the treated wood showed cracks, and these cracks influenced the significant loss of the values of the mechanical properties of compression, tension, and flexion. The shear showed strength gain for the temperature of 155 ºC, and the wood treated at 165 ºC was equivalent to untreated wood. The woods submitted to temperatures of 175 ºC and 185 ºC presented strength losses. The heat treatment in question con-tributes to increase the visibility, use and market value of wood.

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经热处理的石竹木材的特性研究

为了更好地了解杉木品种Acrocarpus fraxinifolius，本研究试图分析热处理对工业规模下杉木品种(也被普遍称为印度雪松)的影响。热处理在高压灭菌器中进行，温度和压力控制，饱和蒸汽注入，温度为155ºC, 165ºC, 175ºC和185ºC。对分析过的木材进行了物理、化学和力学测试。整体纤维素和总木质素含量降低，浸出物含量显著增加。热处理后木材密度增加，但出现裂纹，这些裂纹影响了压缩、拉伸和弯曲力学性能值的显著损失。当温度为155ºC时，剪切强度增加，而在165ºC下处理的木材与未处理的木材相当。木材在175℃和185℃的温度下表现出强度损失。热处理有助于提高木材的可视性、使用和市场价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Maderas-ciencia Y Tecnologia 工程技术-材料科学：纸与木材

CiteScore

2.60

自引率

13.30%

发文量

审稿时长

>12 weeks

期刊介绍： Maderas-Cienc Tecnol publishes inedits and original research articles in Spanish and English. The contributions for their publication should be unpublished and the journal is reserved all the rights of reproduction of the content of the same ones. All the articles are subjected to evaluation to the Publishing Committee or external consultants. At least two reviewers under double blind system. Previous acceptance of the Publishing Committee, summaries of thesis of Magíster and Doctorate are also published, technical opinions, revision of books and reports of congresses, related with the Science and the Technology of the Wood. The journal have not articles processing and submission charges.