欢迎访问林业科学,今天是

林业科学 ›› 2007, Vol. 43 ›› Issue (09): 53-56.doi: 10.11707/j.1001-7488.20070911

• 论文及研究报告 • 上一篇    下一篇

蒸汽爆破后毛果冷杉湿心材的渗透性分析*

张耀丽1 蔡力平2 徐永吉1   

  1. 1.南京林业大学 南京210037;2.加拿大国家林产工业研究院 温哥华2665 East Mall V6T 1W5
  • 收稿日期:2006-05-10 修回日期:1900-01-01 出版日期:2007-09-25 发布日期:2007-09-25

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

Zhang Yaoli1,Cai Liping2,Xu Yongji1   

  1. 1.Nanjing Forestry Univenhy Nanjing 210037;2.Forintek Canada Corp.2665 East Mall V6T 1W5,Vancouver,B.C.Canada
  • Received:2006-05-10 Revised:1900-01-01 Online:2007-09-25 Published:2007-09-25

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。

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

Abstract:

Permeability of sub-alpine fir (Abies lasiocarpa) wetwood after steam-explosion treatment was determined and amicroscope analysis was carried out in this study.Comparing to the control,radial and tangential permeability of sub-alpine firwetwood 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 madesome aspirated pits un-aspirated and ruptures on pit membranes.

Key words: steam explosion, sub-alpine fir, wetwood, permeability, reposition or ruptures of pit memebrane