竹纤维微生物改性对竹塑复合材料性能的影响

发布时间：2018-03-31 23:12

本文选题：竹纤维　切入点：竹塑复合　出处：《塑料》2017年01期

【摘要】：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%。
[Abstract]:The bamboo fiber was modified by microorganism method, and its effect on the composition and structure of bamboo fiber was studied. The PP / BF / PP composites with different bamboo / plastic ratio were prepared by hot pressing, and the mechanical properties of the composites were also studied. The microstructures of bamboo fibers on polypropylene matrix were characterized. The results showed that microbial modification could effectively remove hemicellulose and lignin from cellulose surface. To some extent, the polarity of bamboo fiber was reduced, and the interfacial wettability of bamboo fiber and polypropylene matrix was improved. Compared with pure polypropylene, the elastic modulus was increased by 3.4% and 29.4 respectively, and the flexural strength and flexural modulus were increased by 38.9% and 37.5% respectively.
【作者单位】：浙江工业大学分析测试中心;国家林业局竹子研究开发中心;浙江省竹子高效加工重点实验室;
【基金】：浙江省省院合作林业科技项目(2013SY05)
【分类号】：TB332

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