无胶蔗渣纤维板制备及性能  

The Preparation and Properties of Binderless Bagasse Fiberboard

作　　者：符彬[1] 郑霞[1] 潘亚鸽 李子慕[1] 蒋廷伟 

机构地区：[1]中南林业科技大学

出　　处：《林产工业》2015年第6期14-17,33,共5页China Forest Products Industry

基　　金：湖南省教育厅项目(13c1147);中南林业科技大学引进高层次人才启动基金(104-0425);中南林业科技大学科技创新基金创业项目

摘　　要：以蔗渣纤维为原料,通过热压成型工艺制备了无胶蔗渣纤维板。研究了板材密度、热压温度以及热压时间对其物理力学性能的影响,并通过傅里叶红外光谱及X射线衍射等分析了板材成型机理。结果表明:随着板材密度、热压温度以及热压时间的增加,无胶蔗渣纤维板静曲强度、弹性模量、内结合强度逐渐增大,2h吸水厚度膨胀率逐渐减小。热压过程中,蔗渣纤维中的纤维素和半纤维素基环甙键产生裂变,部分木素降解,产生活性羟基并在纤维间形成氢键,同时,蔗渣纤维中的半纤维素发生水解,生成起胶合作用的缩聚呋喃树脂。热压温度升高,活性羟基及氢键数量增加,缩聚呋喃树脂生成量增大,无胶蔗渣纤维板力学性能更好。With bagasse fiber as raw material, binderless bagasse fiberboard was prepared by hot-pressing technology. The effects of mat density, hot-pressing temperature and hot-pressing time on the physical and mechanical properties of binderless bagasse fiberboard were studied. Forming mechanism of binderless bagasse fiberboard was analyzed by the means of Fourier Transform Infrared Spectrophotometer （ FTIR ） and X-ray Diffraction. The results show that Modulus of Rupture （ MOR ）, Modulus of Elasticity （ MOE ） and Internal Bond strength （ IB ） of fiberboard increase gradually and its thickness swelling rate of water absorbing （ TS ） decreases gradually with the increase of mat density, hot-pressing temperature and hot-pressing time. Active hydroxyls were produced due to the breaking of cellulose and hemicellulose basic ring glucoside keys and part of lignin degradation in the hot-pressing processing, while hydrogen bond can be formed between active hydroxyl in the bagasse fibers. Aldehyde hydrolysate that contains hydroxyl were produced with the hydrolysis of hemicellulose in the bagasse fibers. Polycondensation of furan resin with gluing effect were produced by the condensation polymerization of aldehyde hydrolysate. More active hydroxyl, hydrogen bond and furan resin were increase of hot-pressing temperature, so the mechanical properties of binderless bagasse fiberboard produced with the became better.

关 键 词：无胶蔗渣纤维板 密度 热压温度 热压时间 力学性能 

分 类 号：S566.1[农业科学—作物学] TS653.6[轻工技术与工程]