Effects of the Thickness of the Heat-Treated Wood Specimen on Water-Soluble Extractives and Mechanical Properties of Merbau Heartwood
Effects of the Thickness of the Heat-Treated Wood Specimen on Water-Soluble Extractives and Mechanical Properties of Merbau Heartwood
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DOI：
10.15376/biores.8.1.603-611
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发表时间：
2012-12
期刊：
影响因子：
1.5
通讯作者：
Chuanshuang Hu;Guifen Jiang;Jianhui Zhou;Min Xiao;Z. Yi
中科院分区：
文献类型：
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作者：
Chuanshuang Hu;Guifen Jiang;Jianhui Zhou;Min Xiao;Z. Yi
印茄木在户外应用中存在缺点，因为其水溶性提取物很容易浸出并污染邻近的材料。这项研究检查了热处理木材样本的水溶性提取物的厚度和一些机械性能。结果表明，热处理可有效去除印茄心材的水溶性提取物并克服浸出问题。当加热时间从1小时增加到5小时时，紫外光的吸光度强度降低。主吸收峰从表层到核心层逐渐增加。当加热持续时间超过某一点时，热处理样品的弹性模量（MOE）和断裂模量（MOR）显示出显着降低。热处理和水提取过程中的总质量损失证明热处理有效地去除了水溶性提取物。
Merbau wood has a disadvantage in outdoor applications because its water-soluble extractives readily leach out and stain adjacent materials. This study examined the thickness of the heat-treated wood specimen on water-soluble extractives and some mechanical properties. The results show that heat treatment is efficient at removing the water-soluble extractives of merbau heartwood and overcoming the leaching problem. The absorbance of UV light decreased in intensity when the duration of heating was increased from 1 hour to 5 hours. The dominant absorbance peak increased from the surface layer to the core layer. The modulus of elasticity (MOE) and modulus of rupture (MOR) of heat-treated samples showed significant reductions when the heating duration exceeded a certain point. The total loss of mass during heat treatment and water extraction verified that heat treatment removes the water-soluble extractives efficiently.