Effects of wood rays on the shrinkage of wood during the drying process

被引：0
作者：
Xue Q. [1 ]
Sun W. [1 ,2 ]
Fagerstedt K. [3 ]
Guo X. [1 ,2 ]
Dong M. [1 ]
Wang W. [1 ]
Cao H. [1 ]
机构：
[1] School of Engineering, Zhejiang A and F University, Lin'an
[2] Laboratory of Wood Science and Technology, Zhejiang A and F University, Lin'an
[3] Viikki Plant Science Centre VIPS, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki
来源：
BioResources | 2019年 / 13卷 / 03期
关键词：
Anisotropy; Drying; Restraint; Shrinkage; Wood ray;
D O I：
10.15376/biores.13.3.7086-7095
中图分类号：
学科分类号：
摘要：
To elucidate the origin of shrinkage anisotropy of wood during the drying process, wood from three tree species, Quercus sp., Juglans nigra, and Pometia pinnata, was analyzed using thin cryomicrotome sections and sequential drying on a micro-scale. The data on shrinkage, based on the transverse direction, were calculated using Image Pro Plus software to measure the thickness of the cell wall of fibers. The results showed that: (1) In the tangential direction, the shrinkage of wood fibers were all in the "smallest-bigger-smaller (-bigger-smaller)" pattern from A to C (A: The cells closest to the wood rays; C: The cells in the middle between the wood rays) and fibers next to the rays always have the minimum shrinkage at different moisture contents; (2) the width of the rays has no negative correlation with the shrinkage of wood fibers; and (3) the rays have the same effect on the shrinkage of wood fiber cells in both latewood and earlywood. In addition, the shrinkage of latewood is more severe than that of earlywood, which leads to tangential shrinkage. © 2018, BioResources.
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页码：7086 / 7095
页数：9
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