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林业科学 ›› 1997, Vol. 33 ›› Issue (4): 365-373.

• 论文及研究报告 • 上一篇    下一篇

杨木爆破处理及制板的研究*

陆熙娴,秦特夫,颜镇,黄洛华   

  1. 中国林业科学研究院木材工业研究所 北京 100091
  • 收稿日期:1996-05-23 出版日期:1997-07-25 发布日期:1997-07-25

STUDY ON STEAM EXPLOSION AND PRESSING PARTICLEBOARD OF POPULAR WOOD

Xixian Lu,Tefu Qin,Zhen Yan,Luohua Huang   

  1. Research Institute of Wood Industry CAF Beijing 100091
  • Received:1996-05-23 Online:1997-07-25 Published:1997-07-25

摘要:

用Ⅰ-72杨为原料,经高温高压爆破处理,处理后的杨木各化学组分发生变化,用不同的分析方法对各组分进行分析。在不加任何化学助剂的条件下,依靠自身化学组分的转化,对爆破处理过的试材,经热压制出刨花板。分析研究压板前后化学组成变化和板材物理力学性质,其结果为:①比较不同爆破条件下,同一种试样化学组成的变化,爆破条件越激烈,纤维素降解越显著,收获率超低;游离糖则相应增加;木质素含量先增加,然后降低;热水抽出物含量也是先增加,然后再降低。②扫描电镜观察爆破处理后的试样,纤维排列有变化,整齐的排列变为弯曲和分开。③经爆破处理的试样相对结晶度增加,结晶区增加。总之,爆破后的试材可压制出耐水性能好的刨花板。

关键词: 木材爆破处理, 纤维素降解, 人造板

Abstract:

Wood chips of Ⅰ-72 Poplar were treated with a high pressure steam and pressed into particleboard respectably through the conversion of chemical components.The results are as follows:1.In the intense steam explosion conditions, the cellulose of the chips was degraded remarkably and the explosion yield was lower, and the content of lignin and hot-water extract increased at first and then decreased with a steam pressure increased while the content of free sugar increased; 2.By scanning electronic microscopy fibers of the explosion woods were observed to be roughed and broken; 3. The crystallinity Was found to be increased by steam explosion; 4.Through steam explosion the wood chips could be pressed into particleboard with good water—proof.

Key words: Steaming explosion, Cellulose degradation, Pressing particleboard