Abstract Inspired by the mechanical strength produced by Graphene oxide (GO) and Polyethylene Glycol-b-Polypropylene Glycol-b-Polyethylene Glycol (TBCP) block copolymer separately in epoxy composites, we have incorporated both these materials in the form of a graft (GO-g-TBCP) in epoxy. This idea of exploiting the synergistic effect of nanofiller and block copolymer in the form of a graft in the epoxy matrix is a maiden attempt. The grafting process was confirmed through FTIR, FTNMR, XPS, XRD and Raman spectroscopy. Both GO-g-TBCP and GO were incorporated into epoxy and the mechanical properties of the composites were analysed. The fracture toughness showed a tremendous improvement of about 400% without affecting the inherent tensile properties. GO-g-TBCP toughened epoxy displayed about 100% improvement in storage modulus and 33% improvement in tensile strength. These enhanced properties were explained by probing into the sequential arrangement of the nanostructures into a fractal-like structure with the help of HRTEM and SEM micrographs.

中文翻译：

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三嵌段共聚物接枝氧化石墨烯作为纳米填料用于环氧树脂增韧

摘要 受氧化石墨烯 (GO) 和聚乙二醇-b-聚丙二醇-b-聚乙二醇 (TBCP) 嵌段共聚物分别在环氧树脂复合材料中产生的机械强度的启发，我们将这两种材料以接枝 (GO) 的形式结合在一起。 -g-TBCP) 在环氧树脂中。这种利用纳米填料和嵌段共聚物在环氧树脂基体中接枝形式的协同效应的想法是首次尝试。通过FTIR、FTNMR、XPS、XRD和拉曼光谱证实了接枝过程。GO-g-TBCP 和 GO 都被掺入环氧树脂中，并分析了复合材料的机械性能。在不影响固有拉伸性能的情况下，断裂韧性显着提高了约 400%。GO-g-TBCP 增韧环氧树脂的储能模量提高了约 100%，拉伸强度提高了 33%。这些增强的特性是通过在 HRTEM 和 SEM 显微照片的帮助下探索纳米结构的顺序排列成分形结构来解释的。