Changes of decay and termite durabilities of Japanese larch (Larix leptolepis) wood due to high-temperature kiln drying processes
Changes of decay and termite durabilities of Japanese larch (Larix leptolepis) wood due to high-temperature kiln drying processes
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DOI：
10.1007/s10086-004-0684-5
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发表时间：
2005-01-01
影响因子：
2.9
通讯作者：
Kurimoto, Y
中科院分区：
文献类型：
--
作者：
Doi, S;Aoyama, M;Kurimoto, Y
研究了高温干燥时间（120℃~ 130℃）对落叶松木材腐烂和白蚁取食的影响。用热重分析法研究了木材组分的变化。腐殖和白蚁摄食试验表明，高温干燥的样品对腐殖真菌palustris和白蚁Coptotermes formosanus和Reticulitermes speratus的攻击很敏感。与对照样品相比，热分析结果表明，这些干燥程序改变了化学成分。本研究结果表明，即使在相对较低的温度下，白蚁的取食速度也会加快，而在我们之前的研究中，日本落叶松木材使用了170℃的蒸汽处理。在高温干燥过程中，当半纤维素减少时，对褐腐菌的腐烂耐久性也降低了，这可能是由于低分子量片段的产生。
We investigated the effects of high-temperature drying schedules (120 degrees-130 degrees C) on decay and termite feeding of Japanese larch timbers. Thermogravimetric analysis was conducted to investigate changes of the wood components. Decay and termite feeding tests showed that specimens dried under high-temperature schedules were susceptible against a decaying fungus Fomitopsis palustris and attacks from termites Coptotermes formosanus and Reticulitermes speratus. These drying schedules changed chemical components, which were suggested by the thermal analytical result compared to the control sample. The results of this study indicated that the acceleration of termite feeding takes place even under temperatures that are comparatively lower than that used in our previous research in which 170 degrees C steaming treatment was applied to Japanese larch wood. Decay durability against a brown rot fungus also decreased, possibly from production of low molecular weight fragments when hemicellulose decreased during the high-temperature drying processes.