蒸汽爆破后毛果冷杉湿心材的渗透性分析  

Effects of Permeability in Sub-Alpine Fir Wetwood by Steam Explosion

作　　者：张耀丽[1] 蔡力平 徐永吉[1] 

机构地区：[1]南京林业大学,南京210037 [2]加拿大国家林产工业研究院

出　　处：《林业科学》2007年第9期53-56,共4页Scientia Silvae Sinicae

基　　金：加拿大国家项目(3890)

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。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.

关 键 词：蒸汽爆破 毛果冷杉 湿心材 渗透性 纹孔膜复位或破坏 

分 类 号：S781.35[农业科学—木材科学与技术]