无胶烟秆刨花板喷蒸热压自胶合  

Steam Injection Pressing Self-bonding of Bindless Tobacco Stem Particleboard

作　　者：郑霞[1] 李新功[1] 吴义强[1] 乔建政[1] 

机构地区：[1]中南林业科技大学材料科学与工程学院,长沙410004

出　　处：《中国农学通报》2014年第1期108-113,共6页Chinese Agricultural Science Bulletin

基　　金：国家"十二五"科技计划课题"人造板节能环保制造技术研究与示范"(2012BAD24B03);湖南省科技厅科技计划项目"农作物秸秆无胶人造板制备技术研究"(2013SK3151);"绿色室内建筑装饰材制造关键技术研究"(2013SK3154);中南林业科技大学引进高层次人才科研启动基金项目"利用农作物秸秆制备绿色家居材料技术研究"(104-0425);中南林业科技大学青年基金项目"速生人工林木材高温炭化改性技术研究"(QJ2010016B)

摘　　要：为了研究无胶烟秆刨花板喷蒸热压自胶合机理,通过喷蒸热压工艺制备无胶烟秆刨花板。采用傅里叶红外光谱分析(FTIR)、热重分析(TG)、高效液相色谱分析(HPLC)以及比表面积分析(BET)等分析手段,分析了无胶烟秆刨花板自胶合机制。结果表明:喷蒸热压过程的水、热协同作用使纤维素分子的活性羟基数量增加,活性羟基间可以形成氢键(O-H…H),在烟秆刨花间可以形成范德华力;喷蒸热压过程的水、热协同作用使烟秆刨花中的部分半纤维素水解,水解产物可以进行缩聚反应,生成类似于胶黏剂的缩聚呋喃树脂,也可以直接与具有酚羟基结构的木素发生缩聚反应,形成类似于酚醛树脂胶黏剂的缩合物。另外,烟秆刨花中的木质素受水热作用而充分流展并均匀分布在烟秆刨花间,一定程度上也改善了无胶烟秆刨花板物理力学性能。In order to study the steam injection pressing self-bonding mechanism of bindless tobacco stem particboard,bindless tobacco stem particleboard was prepared by steam injection pressing in this paper.Fourier transform infrared spectroscopy（FTIR）,thermogravimetric analysis（TG）,high performance liquid chromatography analysis（HPLC） and specific surface area（BET） were used to analyze the self-bonding mechanism of bindless tobacco stem particboard.The results showed that：the number of active hydroxyl in cellulose molecule was increased by the synergistic effect of the water and heat,active hydroxyl groups could form hydrogen bonds（O-H…H）,van der Waals forces was formed between each of the two tobacco stem particles in the process of steam injection pressing;part of hemicellulose in tobacco stem particle was hydrolyzed by the synergistic effect of the water and heat,the hydrolysate could be subjected to polycondensation reaction to generate polycondensation furan resin which was similar to adhesives,the hydrolysate also could be subjected to polycondensation reaction with the lignin having a phenolic hydroxyl structure to generate a kind of condensation compound which was similar to phenolic resin adhesive.In addition,the lignin in tobacco stem particle was fully expanded and part of lignin was evenly distributed between each of the two tobacco stem particles by the synergistic effect of the water and heat,which could improve the physical and mechanical properties of bindless partcleboard to some extent.

关 键 词：烟秆 无胶刨花板 喷蒸热压 自胶合 

分 类 号：S784[农业科学—林学]