预冻处理减少木材皱缩的研究  

STUDY ON MECHANISM OF DECREASING WOOD COLLAPSE BY PRE-FREEZING

作　　者：王喜明[1] 赵广杰[2] 刘晓丽[1] 薛振华[1] 

机构地区：[1]内蒙古农业大学,呼和浩特010018 [2]北京林业大学,北京100083

出　　处：《林业科学》2003年第5期95-99,T006,共6页Scientia Silvae Sinicae

基　　金：国家自然科学基金资助项目 ( 3 9760 0 63 );内蒙古自治区科技厅基金项目 ( 2 0 0 0 13 0 3 )。

摘　　要：以大青杨为试验材料 ,研究了预冻处理对木材干燥皱缩特性的影响 ,分析了木材在冰冻处理过程中木材细胞腔和细胞壁尺寸的变化规律 ,理论上计算了细胞壁强度的增加范围。并通过电子显微镜分析冰冻过程对木材细胞壁结构的影响 ,进而深入探讨预冻处理减小木材皱缩的机理 ,为减少木材皱缩提供理论基础。结果表明 :预冻处理可以减少大青杨木材的皱缩。This paper studied on the effort of pre freezing process on wood drying and collapse properties, analyzed the regulations of the size changing of cell lumen and cell wall caused by free water in pre freezing process, and calculated the extension to which the cell wall intension increased theoretically,as Populus ussuriensis to be material. By using electronic microscope,the effect of freezing process on the cell wall structure was studied, and the mechanism on how pre freezing deleted wood collapse was discussed. The results showed that freezing treatment could reduce collapse.

关 键 词：预冻处理 木材皱缩 大青杨 木材细胞腔 细胞壁尺寸 变化规律 细胞壁强度 电子显微镜 

分 类 号：S781.2[农业科学—木材科学与技术]