Abstract Carbon fiber-reinforced polymer (CFRP) composites containing graphene nanoplatelets (GNPs) were prepared and characterized. Bonding via π−π interactions with poly(4-aminostyrene) (PAS) improved the degree of dispersion of the GNPs in an epoxy matrix. Differences in dispersion and reinforcement between pristine GNPs and PAS-GNPs were established by ultraviolet–visible spectroscopy and scanning electron microscopy. The PAS-GNP/epoxy nanocomposites were characterized by their fracture toughness. The results were discussed in terms of the dispersion quality of the GNPs. Furthermore, the PAS-GNP/epoxy nanocomposites were applied to carbon fiber fabric and the interlaminar shear strength (ILSS) and fracture toughness were measured. The greatest improvements in ILSS (252%) and fracture toughness (142%) were obtained with 4 wt% PAS-GNPs. The superior mechanical properties of the CF/PAS-GNP/epoxy nanocomposites are attributed to better filler dispersion and crack bridging.

中文翻译：

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含有高负载非共价功能化石墨烯纳米片的碳纤维/环氧树脂纳米复合材料的制备和机械性能

摘要 制备并表征了含有石墨烯纳米片（GNP）的碳纤维增强聚合物（CFRP）复合材料。通过 π-π 与聚（4-氨基苯乙烯）（PAS）相互作用的键合提高了 GNP 在环氧树脂基质中的分散程度。通过紫外-可见光谱和扫描电子显微镜确定原始 GNP 和 PAS-GNP 之间的分散和增强差异。PAS-GNP/环氧树脂纳米复合材料的特征在于它们的断裂韧性。根据 GNP 的分散质量对结果进行了讨论。此外，将 PAS-GNP/环氧树脂纳米复合材料应用于碳纤维织物，并测量了层间剪切强度 (ILSS) 和断裂韧性。ILSS (252%) 和断裂韧性 (142%) 的最大改进是使用 4 wt% PAS-GNPs 获得的。