摘要
以过热蒸汽为传热介质和保护性气体,在热处理温度为160℃、180℃、200℃和220℃,热处理时间均为4h的条件下对圆盘豆木材进行高温热处理后,采用综合热分析仪对圆盘豆热处理材和未处理对照材进行热重分析和差示扫描量热分析,结果表明,热处理使木材的颜色加深、尺寸稳定性增强、强度降低。强度降低的主要原因是热处理使木材中的半纤维素、纤维素、木素发生剧烈的热降解反应。
Okan wood was heat treated at temperature of 160℃, 180℃, 200℃, 220℃ and duration of 4h with the superheated steam as a heating medium and a shielding gas. The thermal gravimetric and differential scanning calorimetry analysis were carried out to the heat-treated and control okan wood specimens through integrated thermal analyzer. The results indicates that the heat-treatment make hemi-cellulous, cellulous and lignin degradation, which leads to the darkening color, the reducing mechanical properties and improving dimensional stability of the heat-treated okan wood.
出处
《木材加工机械》
北大核心
2012年第2期26-30,共5页
Wood Processing Machinery
基金
公益性科研院所基本科研业务费专项资金项目"实木地板超高温热处理改性"(CAFINT2009K04)
关键词
圆盘豆
热处理
热重分析
差示扫描量热分析
Cylicodiscus spp
heat treatment
thermal gravimetric analysis
differential scanning calorimetry analysis
