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  • ISSN 1001-5299    CN 11-1874/S   邮发代号:2-141
  • 主办:国家林业和草原局林产工业规划设计院 中国林产工业协会
林产工业
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湿热-压缩处理木材的纤维素晶体结构变化
分别采用不同径向压缩率( 25%和50%) 并结合不同蒸汽处理温度( 140、160 ℃和180 ℃)对人工林杉木(Cunninghamia
lanceolata)进行湿热-压缩处理,然后利用X-射线衍射法(XRD) 研究了湿热-压缩处理对木材纤维素微纤丝角、结晶度及
微晶宽的影响规律。结果表明:湿热-压缩处理木材纤维素微纤丝角无明显变化,结晶度和微晶宽均增大。结晶度增幅
介于28%~38%,不同压缩率和蒸汽处理温度对纤维素结晶度影响无显著差异。随着蒸汽处理温度的增加,微晶宽逐渐增
大,在180 ℃蒸汽处理条件下达到最大值。
1中国林业科学研究院木材工业研究所
2.北京林业大学材料科学与技术学院
Cellulose Crystalline Structure Changes of the Wood Treated by Compression Combined with Steam
Compression combined with steam treatment to Chinese fir (Cunninghamia lanceolata) was carried#br# out with different radial compression (compression ratio of 25% and 50%) in combination with different steam#br# treatment temperatures (140, 160 ℃ and 180 ℃). The variation of cellulose microfibril angle, crystallinity and#br# crystallite width were characterized by X-ray diffraction(XRD). The results indicated that cellulose microfibril#br# angle had no significant changes, however crystallinity and crystallite width were increased after CS-treatment.#br# About 28%~38% increase of crystallinity was observed. Different compression ratios and steam treatment#br# temperatures did not affect cellulose crystallinity significantly. With the increase of compression ratios, crystallite#br# thickness increased gradually, the maximum value could be obtained when at 180 ℃.
1.Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
2.College of Materials Science and Technology, Beijing Forestry University, Beijing 100083,China