论文部分内容阅读
采用微生物法对竹纤维进行改性,研究其对竹纤维成分及结构的影响,通过热压成型制备了不同竹塑配比的竹纤维增强聚丙烯复合材料(PP/BF),并对其力学性能、断面微观结构进行表征来探讨竹纤维对聚丙烯基体的增强性能。结果表明:微生物改性能有效去除纤维素表面部分的半纤维素、木质素等成分,并在一定程度上降低了竹纤维的极性,改善了竹纤维与聚丙烯基体的界面浸润性。所得的竹塑复合材料以竹纤维添加量为30%时,力学性能最优,其拉伸强度、弹性模量较纯聚丙烯材料分别增强了3.4%、29.4%,弯曲强度、弯曲模量分别提高了38.9%、37.5%。
The bamboo fiber was modified by microbe method to study its influence on the composition and structure of bamboo fiber. The bamboo fiber reinforced polypropylene (PP / BF) composite with different ratio of bamboo and plastic was prepared by hot press molding. Performance, microstructure of the cross-section to investigate the bamboo fiber reinforced polypropylene matrix performance. The results showed that microbial modification could effectively remove the hemicellulose, lignin and other components of the surface of cellulose, and to a certain extent, reduce the polarity of bamboo fiber and improve the interfacial infiltration of bamboo fiber and polypropylene matrix. Compared with the pure polypropylene material, the tensile strength and elastic modulus of the obtained bamboo-plastic composite material increase by 3.4%, 29.4%, flexural strength and flexural modulus Increased by 38.9%, 37.5%.