杨木纤维表面改性及其HDPE复合材料性能研究  

Study on Surface Modification of Poplar Wood Fiber and Properties of Its HDPE Composites

作　　者：张锋[1] 李斌[1] 郭丽华[1] 

机构地区：[1]东北林业大学理学院黑龙江省阻燃新材料制备与分子设计重点实验室,黑龙江哈尔滨150040

出　　处：《化学与粘合》2008年第4期37-41,共5页Chemistry and Adhesion

基　　金：黑龙江省杰出青年科学基金项目(项目编号:JC04-06)

摘　　要：利用过氧化物作为引发剂,加入马来酸酐偶联把聚乙烯蜡接枝到杨木纤维表面上。接枝前后木纤维的红外光谱和色散自由能的显著变化证实了接枝反应的发生,并通过一系列实验计算了反应的接枝率;随着反应温度的提高,接枝率呈上升趋势,在170℃以上变化趋势变缓。与未改性的木纤维相比,改性后木纤维填充HDPE复合材料的力学性能有较大提高,其拉伸、弯曲、冲击强度可分别提高34.9%,29.2%和8.8%,但随着聚乙烯蜡接枝量的增大,材料力学性能又有所下降。扫描电镜照片显示改性木纤维在基体中分散更均匀,界面结合良好。Pafyetbylene wax combined with maleic anhydride was grafted on the surface of poplar wood fiber initiated with peroxide. The obvioqs variety of FTIR and dispersive free energy of the wood fiber before and after treatment confirmed that the grafting reaction had taken place. The grafting ratio was calculated. The result showed that the grafting ratio increased with the rising temperature. When the temperature was higher than 170℃, the increasing trend was unobvious. The mechanical properties of the grafted wood fiber filled HDPE composites were better than those of untreated ones. The tensile strength, flexural strength and impact strength increased 34.9% , 29.2% and 8.8% respeetively. However, the mechanical properties of grafted wood fiber filled HDPE composites would decrease with the quantities increase of grafted polyethylene wax increasing. The SEM micrographs revealed that the modified wood tiber had uniform dispersion in polymer matrix and the interface bonding was good.

关 键 词：木纤维 HDPE 马来酸酐 接枝 聚乙烯蜡 

分 类 号：TQ314.246[化学工程—高聚物工业]