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首页> 外文会议>International Woodcoatings Congress >The Effect of Wood Density on the Photodegradation Depth Profiles of Japanese Cedar(Cryptomeria Japonica D, Don)Earlywood and Latewood
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The Effect of Wood Density on the Photodegradation Depth Profiles of Japanese Cedar(Cryptomeria Japonica D, Don)Earlywood and Latewood

机译：木质密度对日本雪松（Cryptomeria Japonica D，Don）Hethich和Lighwood的光降解深度剖面的影响

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Low density earlywood is more rapidly eroded than denser latewood when wood is exposed to the weather,possibly because it is more susceptible to photodegradation.FTIR-microscopy was used to examine the depth of photodegradation in Japanese cedar earlywood and latewood exposed to artificial sunlight emitted by a xenon lamp(375W/m~2 within the 300 to 700nm spectral range),and the relationship between the density of the tissue types and depth of photodegradation.The depth of photodegradation in earlywood and latewood in specimens exposed to artificial light for 1500 hours were 650 and 200 urn,respectively,and there was an inversely proportional relationship between depth of photodegradation and wood density.These findings explain why earlywood is more rapidly eroded than latewood during weathering,and more generally the inverse relationship between the density of wood species and their rate of erosion during artificial and natural weathering.
机译：当木材暴露于天气时，低密度早期更迅速侵蚀，可能是因为它更容易光降解更容易受到光降解。使用 - 显微镜用于检查日本雪松早期和后乳胶的光降解深度暴露于人工阳光氙灯（300至700nm的375W / m〜2，光谱范围内375W / m〜2），以及组织类型密度与光电深度之间的关系。皮肤涂层和胶水的光电深度暴露于人造光线1500小时分别是650和200瓮，在光电降解和木质密度的深度之间存在成反比的关系。这些结果解释了为什么早熟在风化期间更快地侵蚀胶水，更普遍的是木材物种密度之间的逆关系他们在人工和自然风化过程中的侵蚀率。

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