西北林学院学报2013，Vol.28Issue(4)：153-157,5.DOI:10.3969/j.issn.1001-7461.2013.04.31
PEG400预处理枫桦圆盘干燥特性研究
Drying Characteristics of Betula costata Disk Pretreated with PEG400
摘要
Abstract
In order to expand the application extent of the woods with low quality,and to promote their economic values,one of the effective ways is to process them into disk-shaped timber (DST).However,DST is easy to be cracked during drying.To solve the problem,a solution called PEG400 was applied for the pretreatment before making the Betula costata DST.The influences of the pretreatment on the drying characteristics of B.costata DST were examined.The mechanism of preventing the occurrence of the cracking was discussed.The results showed that drying quality of pretreated DST with a thickness of 40 mm was satisfactory.The adaptability for the drying conditions was promoted after the pretreatment.The pretreatment significantly affected radial moisture content gradient.To diminish D-value of shrinkage coefficient between radial and tangential direction was the major function of restraining cracking by PEG400.关键词
PEG400/预处理/枫桦圆盘/干燥开裂Key words
PEG400 / pretreatment / Betula costata / drying cracking分类
农业科技引用本文复制引用
杨亮庆,刘一星,蔡英春..PEG400预处理枫桦圆盘干燥特性研究[J].西北林学院学报,2013,28(4):153-157,5.基金项目
黑龙江省财政项目(HCZ201301) （HCZ201301）
国家自然科学基金(31270595). （31270595）
