Comparative studies of mechanical and morphological properties of polylactic acid and polypropylene based natural fiber composites
Comparative studies of mechanical and morphological properties of polylactic acid and polypropylene based natural fiber composites
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DOI：
10.1177/0731684412447992
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发表时间：
2012-12-01
影响因子：
3.1
通讯作者：
Madaan, Jitendra
中科院分区：
文献类型：
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作者：
Bajpai, Pramendra Kumar;Singh, Inderdeep;Madaan, Jitendra
本研究采用热压叠层法制备了天然纤维增强聚乳酸复合材料。使用的增强材料是荨麻，紫花和剑麻纤维在平纹编织形式。为便于比较，还开发了使用相同纤维的聚丙烯基复合材料。所有开发的复合材料的机械性能（拉伸、压缩、弯曲和冲击性能）都通过标准测试程序进行了评估。研究发现，聚乳酸基复合材料具有优异的力学性能，在许多应用领域具有替代传统合成纤维复合材料的潜力。在力学性能方面，聚乳酸/剑麻复合材料表现出最佳的综合性能。利用扫描电子显微镜对复合材料力学试验中断裂表面的形貌进行了研究，揭示了复合材料在不同力学载荷作用下的破坏机理。
In this study, natural fiber reinforced polylactic acid composites have been developed by hot pressing through film-stacking procedure. The reinforcement materials used are nettle, Grewia optiva and sisal fibers in the plain weave form. For comparison purposes, polypropylene-based composites using the same fibers have also been developed. Mechanical properties (tensile, compressive, flexural, and impact properties) of all the developed composites have been evaluated through standard test procedures. It has been found that the polylactic acid based composites have superior mechanical properties and can be a potential substitute for traditional synthetic fiber composites in many application areas. Polylactic acid/sisal composite showed overall the best performance in terms of mechanical behavior. The morphological study of the fractured surface during mechanical testing has been done using scanning electron microscopy, which provides the mechanism of failure of composites during different types of mechanical loadings.