Abstract

The present work emphasizes the synthesis of bio-nanocomposites using PLA and epoxy resin-based matrices through solution casting technique. An optimized 20% PLA-epoxy combination is further reinforced with nanofillers of graphene and multiwalled carbon nanotubes (MWCNTs). Dosage of the nanofillers is varied from 0.2 to 0.4 wt.% to develop bio-nanocomposites. Microstructure, characteristic studies such as SEM, TGA, and FTIR of the developed hybrid bio-nanocomposites are studied for the behavior of the novel material synthesized. From the experimental results obtained, hybrid bio-nanocomposites with 0.2 wt.% of graphene showed an increase in tensile and flexural strength, whereas MWCNT 0.3 wt.% showed an increase in tensile strength and 0.2 wt.% showed an increase in flexural strength compared to other weight percentages of both nanofillers (NFs). Further the SEM micrographs showed uniform distribution of NFs in the epoxy-PLA matrix. However, beyond 0.2wt.% of NFs dosage in the matrix the mechanical properties deteriorated due to non-uniform distribution of the nanofillers as seen in SEM micrographs. Experiments results are validated using FEM analysis for both hybrid bio-nanocomposites and epoxy/PLA composites. The results showed good agreement with an error of 10%. Hence 0.2 wt.% graphene and 0.3 wt.% MWCNT reinforced hybrid bio-nanocomposites could be used as an alternative material for automotive component applications.

Graphical Abstract

中文翻译：

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混合生物纳米复合材料在结构上的应用研究

摘要

本工作着重于通过溶液浇铸技术使用PLA和基于环氧树脂的基质合成生物纳米复合材料。石墨烯和多壁碳纳米管（MWCNT）的纳米填料进一步增强了优化的20％PLA-环氧组合。纳米填料的剂量在0.2至0.4重量％之间变化以开发生物纳米复合材料。研究了已开发的混合生物纳米复合材料的微观结构，特性研究，如SEM，TGA和FTIR，以研究合成的新型材料的行为。从获得的实验结果来看，具有0.2 wt。％石墨烯的杂化生物纳米复合材料显示出抗张强度和弯曲强度的增加，而MWCNT 0.3 wt。％显示出抗张强度的增加，而0.2 wt。％显示出抗弯强度的增加。两种纳米填料（NFs）的其他重量百分比。此外，SEM显微照片显示了NFs在环氧-PLA基质中的均匀分布。然而，如在SEM显微照片中所见，在基体中超过NFs剂量的0.2wt。％，由于纳米填料的不均匀分布，机械性能恶化。使用FEM分析验证了混合生物纳米复合材料和环氧/ PLA复合材料的实验结果。结果显示出良好的一致性，误差为10％。因此，可以将0.2重量％的石墨烯和0.3重量％的MWCNT增强的杂化生物纳米复合材料用作汽车部件应用的替代材料。使用FEM分析验证了混合生物纳米复合材料和环氧/ PLA复合材料的实验结果。结果显示出良好的一致性，误差为10％。因此，可以将0.2重量％的石墨烯和0.3重量％的MWCNT增强的杂化生物纳米复合材料用作汽车部件应用的替代材料。使用FEM分析验证了混合生物纳米复合材料和环氧/ PLA复合材料的实验结果。结果显示出良好的一致性，误差为10％。因此，可以将0.2重量％的石墨烯和0.3重量％的MWCNT增强的杂化生物纳米复合材料用作汽车部件应用的替代材料。

图形概要