无胶烟秆刨花板喷蒸热压自胶合-中国农学通报.pdf

中国农学通报 2014,30(1): 108-113 Chinese Agricultural Science Bulletin 无胶烟秆刨花板喷蒸热压自胶合 郑 霞，李新功，吴义强，乔建政 （中南林业科技大学材料科学与工程学院，长沙410004 ） 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。 关键词：烟秆；无胶刨花板；喷蒸热压；自胶合 中图分类号：S784 文献标志码：A 论文编号：2013-2054 Steam Injection Pressing Self-bonding of Bindless Tobacco Stem Particleboard ZhengXia,LiXingong,WuYiqiang,QiaoJianzheng (CollegeofMaterialsScienceEngineering,CentralSouthUniversityofForestryTechnology,Changsha410004) Abstract: Inordertostudythesteaminjectionpressingself-bondingmechanismofbindlesstobaccostem particboard,bindlesstobaccostemparticleboardwaspreparedbysteaminjectionpressinginthispaper. 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 mechanismofbindlesstobaccostemparticboard.Theresultsshowedthat:thenumberofactivehydroxylin cellulosemoleculewasincreasedbythesynergisticeffectofthewaterandheat,activehydroxylgroupscould formhydrogenbonds(O-H…H),vanderWaalsforceswasformedbetweeneachofthetwotobaccostem 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