文献类型：期刊文献

中文题名：过热蒸汽干燥对50mm厚柳杉锯材质量及微观构造的影响

英文题名：Effect of Superheated Steam Drying of 50-mm-thickness Chinese Cedar Lumber on Wood Quality and Microstructure

作者：鲍咏泽[1] 周永东[1]

第一作者：鲍咏泽

机构：[1]中国林业科学研究院木材工业研究所

年份：2016

卷号：44

期号：4

起止页码：66-68

中文期刊名：东北林业大学学报

外文期刊名：Journal of Northeast Forestry University

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：林业公益性行业科研专项(201404502)

语种：中文

中文关键词：柳杉;过热蒸汽;干燥质量;微观构造

外文关键词：Chinese Cedar; Superheated steam; Drying quality; Microstructure

分类号：S781.71

摘要：对50 mm厚柳杉锯材进行过热蒸汽干燥试验,对干燥后锯材的终含水率、残余干燥应力及干燥缺陷等干燥质量指标进行统计与分析,并使用扫描电镜进行观察,分析过热蒸汽干燥对木材微观构造的影响。结果表明,柳杉锯材过热蒸汽干燥后的终含水率、厚度含水率偏差、残余干燥应力以及顺弯翘曲率、横弯翘曲率和扭曲率等均能达到锯材干燥质量国家标准规定的一级指标要求,翘曲达到干燥质量二级指标要求;柳杉锯材过热蒸汽干燥质量为二级的合格率为90.32%。通过观察干燥后柳杉木材的微观构造,发现大量纹孔破裂、纹孔膜脱落,导致木材内孔隙增加,表明过热蒸汽干燥会提高木材的渗透性,进而提高木材干燥速率。
Superheated steam drying experiment was conducted on 50-mm-thickness Chinese Cedar（ Cryptomeria fortunei） lumber. The final moisture content（ MC）,residual drying stress and drying defects of the lumber was analyzed after drying,and statistical analysis of drying quality were conducted. Scanning electron microscopy（ SEM） was used to observe microstructure of lumber to discuss the effect of superheated steam drying on wood microstructure. The quality indexes including final MC,layer moisture content,residual drying stress,crook,cup,and twist can meet the requirements of the first grade in accordance with national standard for lumber drying quality,and warp index can meet the requirements of the 2nd grade.By SEM,the pits in cell wall were broken,and pit membrane was loss,which resulted in the improved permeability of lumber under superheated steam drying,and increased the drying rate in drying process.