【摘要】 测定毛果冷杉湿心材经蒸汽爆破处理后的渗透性,并进行扫描电镜分析。与对照材相比,毛果冷杉湿心材爆破处理后,径向、弦向的气体渗透性均得到不同程度的改善,且随着爆破压力、爆破温度和爆破循环次数的增加而增加。统计分析表明,不同爆破处理后的湿心材渗透性与对照材的差异均显著。湿心材渗透性的改善,主要是由于蒸汽爆破时产生的蒸汽压力使原本闭塞的纹孔膜产生了部分复位或纹孔膜遭到了破坏。更多还原

【Abstract】 Permeability of sub-alpine fir (Abies lasiocarpa) wetwood after steam-explosion treatment was determined and a microscope analysis was carried out in this study. Comparing to the control, radial and tangential permeability of sub-alpine fir wetwood was amplified after steam explosion treatment. The permeability enlarged as the pressure (temperature) or cycles of explosion. A statistical analysis showed that there was a significant difference in permeability between the steam-explosion treated groups and control group. Improvement permeability of sub-alpine fir wetwood attributed to steam-explosion treatment that made some aspirated pits un-aspirated and ruptures on pit membranes.更多还原