Multi-scale hybrid biocomposite: Processing and mechanical characterization of bamboo fiber reinforced PLA with microfibrillated cellulose
Multi-scale hybrid biocomposite: Processing and mechanical characterization of bamboo fiber reinforced PLA with microfibrillated cellulose
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DOI：
10.1016/j.compositesa.2009.01.012
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发表时间：
2009-04-01
影响因子：
8.7
通讯作者：
Thostenson, Erik T.
中科院分区：
文献类型：
--
作者：
Okubo, Kazuya;Fujii, Toru;Thostenson, Erik T.
在这项研究中，我们开发了一种新型的杂化生物复合材料，该复合材料以可生物降解的聚乳酸(PLA)为基质，由微纤化纤维素(MFC)和竹纤维束增强。由于微纤化纤维和竹纤维在规模上的相对差异，形成了一种增强层结构，其中竹纤维束是主要的承载增强材料，而纤维素在竹纤维周围的聚合物基质中产生一个界面，以防止突然的裂纹扩展。研究了MFC分散对聚乳酸基质性能的影响，并观察到断裂前应变能的显著改善。只需加入1wt%的高分散度MFC，就可使断裂能增加近200%。在竹材/MFC/聚乳酸混杂复合材料中，竹材纤维束周围的断裂形态也发生了显著变化。(C)2009爱思唯尔有限公司。保留所有权利。
In this research we develop novel hybrid biocomposites based upon a biodegradable poly(lactic acid) (PLA) matrix reinforced with microfibrillated cellulose (MFC) and bamboo fiber bundles. Due to the relative difference in scale between microfibrillated cellulose and bamboo, a hierarchy of reinforcement is created where bamboo fiber bundles are the primary load-carrying reinforcement and cellulose creates an interphase in the polymer matrix around the bamboo fiber that prevents sudden crack growth. The influence of MFC dispersion on the properties of the PLA matrix was investigated and substantial improvements in the strain energy until fracture observed. By adding just 1 wt% of MFC with a high degree of dispersion an increase in fracture energy of nearly 200% was obtained. In the hybrid bamboo/MFC/PLA composites there is also a dramatic change in the fracture morphology around the bamboo fiber bundles. (C) 2009 Elsevier Ltd. All rights reserved.