Color changes in wood during heating: kinetic analysis by applying a time-temperature superposition method
Color changes in wood during heating: kinetic analysis by applying a time-temperature superposition method
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DOI：
10.1007/s00339-010-5542-2
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发表时间：
2010-04-01
影响因子：
2.7
通讯作者：
Kawai, Shuichi
中科院分区：
文献类型：
--
作者：
Matsuo, Miyuki;Yokoyama, Misao;Kawai, Shuichi
本文研究了钝顶扁豆(Chamaecyparis obtusa Endl.)木头。从木材上切下的样品在90-180摄氏度的温度下加热，作为加速老化处理。在氧气存在下完全干燥和加热的样品使我们能够评估热氧化对木材颜色变化的影响。用分光光度计测得的颜色特性表现出类似的行为，而与每个时间尺度的处理温度无关。利用整个数据集的时间-温度叠加原理，成功地将动力学分析应用于颜色变化。以L*、a*、b*和E-ab*为单位计算的表观活化能分别为117、95、114和113kJ/mol，与文献中有关木材物理力学性质的计算值相近。
This paper deals with the kinetics of the color properties of hinoki (Chamaecyparis obtusa Endl.) wood. Specimens cut from the wood were heated at 90-180 degrees C as accelerated aging treatment. The specimens completely dried and heated in the presence of oxygen allowed us to evaluate the effects of thermal oxidation on wood color change. Color properties measured by a spectrophotometer showed similar behavior irrespective of the treatment temperature with each time scale. Kinetic analysis using the time-temperature superposition principle, which uses the whole data set, was successfully applied to the color changes. The calculated values of the apparent activation energy in terms of L*, a*, b*, and Delta E-ab* were 117, 95, 114, and 113 kJ/mol, respectively, which are similar to the values of the literature obtained for other properties such as the physical and mechanical properties of wood.