Comparing mechanical properties of normal and compression wood in Norway spruce: The role of lignin in compression parallel to the grain
Comparing mechanical properties of normal and compression wood in Norway spruce: The role of lignin in compression parallel to the grain
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DOI：
10.1515/hf.2002.062
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发表时间：
2002-01-01
期刊：
影响因子：
2.4
通讯作者：
Gindl, W
中科院分区：
文献类型：
--
作者：
Gindl, W
细胞壁木质素含量和组合物，以及微纤丝角的正常和压缩木材样品进行测定之前，在压缩平行于粮食的机械测试，没有影响的木质素含量增加的杨氏模量在压缩木材是可辨别的，因为微纤丝角的主导影响。与此相反，压缩木材的抗压强度没有受到负面影响的高微纤丝角。据建议，所观察到的高木质化的压缩木材增加了细胞壁的抗压缩破坏。在压缩木材木质素中观察到的对羟基苯基丙烷单元的百分比增加也可能有助于压缩木材的极高的压缩强度。
Cell-wall lignin content and composition, as well as microfibril angle of normal and compression wood samples were determined prior to mechanical testing in compression parallel to the grain, No effect of increased lignin content on the Young's modulus in compression wood was discernible because of the dominating influence of microfibril angle. In contrast compressive strength of compression wood was not negatively affected by the high microfibril angle. It is proposed that the observed high lignification in compression wood increases the resistance of the cell walls to compression failure. An increased percentage of p-hydroxyphenylpropane units observed in compression wood lignin may also contribute to the comparably high compressive strength of compression wood.