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。
ood chips of I-72 Poplar were treated with a high pressure steam and pressedinto particleboard respectably through the conversion of chemical components。Theresults are as follows:1.In the intense steam explosion conditions,the cellulose ofthe chips was degraded remarkably and the explosion yield was lower,and the contentof lignin and hot-water extract increased at first and then decreased with a steampressure increased while the content of free sugar increased;2.By scanning electronicmicroscopy 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 steamexplosion the wood chips could be pressed in to particledoard with good water-proof.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1997年第4期365-373,共9页
Scientia Silvae Sinicae
基金
国家自然科学基金
关键词
制板
木材爆破处理
纤维素降解
人造板
杨木
Steaming explosion,Cellulose degradation,Pressing particleboard
