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超高温热处理对水曲柳板材尺寸稳定性的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2010年03期
Page:
113-116
Column:
研究论文
publishdate:
2010-06-29

Article Info:/Info

Title:
Effect of superhigh temperature heat treatment on Fraxinus mandshurica board’s dimension stability
Author(s):
TU Dengyun12 WANG Mingjun2 GU Lianbai3 ZHANG Xin2 PAN Chengfeng2 CUI Qipeng4
1.College of Forestry, South China Agriculture University, Guangzhou 510640, China; 2.Research and Development Center of Zhejiang Shiyou Timber Co. Ltd., Huzhou 313009, China; 3.College of Wood Science and Technology, Nanjing Forestry University, Nanjing 210037, China; 4.Monitoring Center of Product Quality of Wood Industry of Zhejiang Province, Huzhou 313009, China
Keywords:
superhigh temperature heattreatment of wood dimension stability equilibrium moisture content sorption hysteresis Fraxinux mandshurica
Classification number :
S781
DOI:
10.3969/j.jssn.1000-2006.2010.03.023
Document Code:
A
Abstract:
The Fraxinus mandshurica board was treated with superhigh temperature in atmospheric pressure superheated steam kiln and pressure steam tank respectively. The effects of two different treatments on the equilibrium moisture content (EMC), dimension stability, sorption hysteresis and shrinkage coefficient of the treated board were investigated. The reason for improving dimension stability by two treatment methods was further revealed. The results show that both of the two treatments can reduce the EMC of the wood, but the pressure steam treatment is more efficient than another one. That method has an advantage to reduce the change of wood moisture content due to the ambient relative humidity, reducing the shrinkage coefficient and increasing the dimension stability. An increase in the heattreat temperature leads to a decrease of the sorption hysteresis of the heattreated wood. The sorption hysteresis of atmospheric pressure superheated steam kiln is lower than that of pressure steam tank under the same heattreat temperature.

References

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Last Update: 2010-06-29