西南林业大学学报2018，Vol.38Issue(2)：158-164,7.DOI:10.11929/j.issn.2095-1914.2018.02.024
含水率与温度对巨尾桉汽蒸效果的影响及机理研究
Effects of Moisture Content and Temperature on Steaming Treatment of Eucalyptus grandis×E.urophylla and Mechanism Analysis
摘要
Abstract
To explore the most suitable steaming process,Eucalyptus grandis×E.urophylla boards with thick-ness of 20 mm, whose moisture content of 130%,60%,50%,30%,20% were steamed at 80℃,100℃,120℃respectively. Visible defects were investigated, combining with scanning electron microscope to analyze the micro structure before and after steaming.Changes of moisture content,the extractives content and defects developing dur-ing kiln-drying were considered. Results showed that the steaming effects were satisfactory when the MC was 50% and temperature was 100℃, respectively. The degree of visible defects of samples steamed in this condition was slighter than other groups,effectively avoiding subsequent drying defects developing. Some of the pit membranes in samples were broken up and ducts were smooth,contributing to improving the permeability. There was a slight re-duction of hot water,1% NaOH and benzene-alcohol extractives after steaming,which provided evidence that duct was clear and the permeability was improved.关键词
巨尾桉/气干/汽蒸/干燥缺陷/渗透性Key words
Eucalyptus grandis×E.urophylla/air-dry/steaming/drying defects/permeability分类
农业科技引用本文复制引用
孔璐璐,赵紫剑,何正斌,伊松林..含水率与温度对巨尾桉汽蒸效果的影响及机理研究[J].西南林业大学学报,2018,38(2):158-164,7.基金项目
林业公益性行业科研专项经费(201404502)资助. （201404502）
