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Assessment of Mechanical and Electrical Performances of Polylactic Acid/Liquid Natural Rubber/Graphene Platelets Nanocomposites in the Light of Different Graphene Platelets Functionalization Routes
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2021-08-13 , DOI: 10.1002/macp.202100185
Nurul Aishah Mohd Amran 1 , Sahrim Ahmad 1 , Ruey Shan Chen 1 , Dalila Shahdan 1 , Moayad Husien Flaifel 2, 3 , Afiqah Omar 1
Affiliation  

The essence core of this study is to investigate the effect of functionalization of graphene platelets (GNPs) and its low loadings of 0.25, 0.50, 0.75, and 1.00 wt% on the chemical, mechanical, and electrical properties of polylactic acid/liquid natural rubber (PLA/LNR) blend prepared by melt blending method. GNPs are treated with amino dodecanoic acid via covalent interaction and Triton X-100 (TX100) via non-covalent interaction to produce ADA-functionalized GNPs (GNP-A) and TX100-functionalized GNPs (GNP-T), respectively. At 0.75 wt% GNPs, the PLA/LNR nanocomposites exhibit the highest tensile strength of 24.38, 35.70, 45.47 MPa for untreated GNPs (GNP-u), GNP-T, and GNP-A, respectively. Variable pressure scanning electron microscopy proves better interaction of treated-GNPs with the matrix, while transmission electron microscopy micrographs have shown that PLA/LNR/GNP-A has the best filler dispersion with minimal stacking and agglomeration found. A remarkable improvement of electrical properties is observed for treated-GNPs nanocomposite with lower percolation threshold value of 0.3 wt% as compared to that of GNP-u nanocomposite (0.4 wt%).

中文翻译:

根据不同石墨烯片功能化途径评估聚乳酸/液体天然橡胶/石墨烯片纳米复合材料的机电性能

本研究的本质核心是研究石墨烯薄片(GNPs)的功能化及其0.25、0.50、0.75和1.00 wt%的低负载量对聚乳酸/液体天然橡胶的化学、机械和电学性能的影响(PLA/LNR) 共混物采用熔融共混法制备。GNPs 通过共价相互作用用氨基十二烷酸处理,Triton X-100 (TX100) 通过非共价相互作用处理,分别产生 ADA 功能化 GNPs (GNP-A) 和 TX100 功能化 GNPs (GNP-T)。在 0.75 wt% GNPs 下,PLA/LNR 纳米复合材料的最高拉伸强度分别为 24.38、35.70、45.47 MPa 的未处理 GNPs (GNP-u)、GNP-T 和 GNP-A。变压扫描电子显微镜证明处理过的 GNP 与基质有更好的相互作用,而透射电子显微镜显微照片表明,PLA/LNR/GNP-A 具有最佳的填料分散性,发现堆积和团聚最少。与 GNP-u 纳米复合材料 (0.4 wt%) 相比,经处理的 GNPs 纳米复合材料具有 0.3 wt% 的较低渗透阈值,观察到电性能的显着改善。
更新日期:2021-10-07
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