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漆酶预处理木纤维制备中密度纤维板性能研究

发表时间:2017-05-15  浏览量:1026  下载量:210
全部作者: 陈广胜,朱晓冬,韩松
作者单位: 东北林业大学信息与计算机工程学院;东北林业大学材料科学与工程学院
摘 要: 利用连续培养白腐菌得到的大量粗漆酶来处理木纤维,活化其木质素成分,使其能够替代一部分脲醛树脂胶。用活化的木纤维制备中密度纤维板,研究漆酶处理对纤维板力学性能的影响。试验结果表明:漆酶处理后制备的纤维板的力学性能优于未经处理的纤维板;当施胶量为8%时,大部分力学性能就能达到国家标准;采用粗酶液处理7 d的木纤维制备的纤维板力学性能最优;通过扫描电镜(scanning electron microscope,SEM)观察木纤维及中密度纤维板的表面微观结构,可以直观地看出粗酶液对木纤维的表面细胞中的木质素有一定的降解作用,对提高中密度纤维板的力学性能起到积极作用。
关 键 词: 木材加工与人造板工艺学;白腐菌;漆酶;中密度纤维板;力学性能
Title: Study on the properties of the production of laccase from white rot fungus to the preparation of medium density fiberboard
Author: CHEN Guangsheng, ZHU Xiaodong, HAN Song
Organization: College of Information and Computer Engineering, Northeast Forestry University; Material Science and Engineering College, Northeast Forestry University; School of Forestry, Northeast Forestry University
Abstract: A large number of crude laccases were produced by white rot fungi using the continuous culture, to activate of the lignin component of treated wood fiber, which can replace the urea formaldehyde resin adhesive part. The effect of laccase treatment on the mechanical properties was studied by preparation of medium density fiberboard activated by wood fiber. The experimental results show that the fiber board prepared after laccase treatment had better mechanical properties than that without fiber board processing. When the resin content is up to 8%, some mechanical properties can reach the national standard. The mechanical properties of the fiber board prepared by 7 days of crude enzyme solution were optimized. The surface cells of laccase of wood fiber in certain lignin degradation can be found through scanning electron microscope (SEM) to observe the surface microstructure of wood fiber and medium density fiberboard, which plays an active role in improving the mechanical properties of medium density fiberboard.
Key words: wood processing and man-made board technology; white rot fungus; laccase; medium density fiberboard; mechanical property
发表期数: 2017年5月第9期
引用格式: 陈广胜,朱晓冬,韩松. 漆酶预处理木纤维制备中密度纤维板性能研究[J]. 中国科技论文在线精品论文,2017,10(9):1019-1024.
 
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