Fabrication and mechanical properties of carbon fiber/epoxy nanocomposites containing high loadings of noncovalently functionalized graphene nanoplatelets
Fabrication and mechanical properties of carbon fiber/epoxy nanocomposites containing high loadings of noncovalently functionalized graphene nanoplatelets
复制标题
DOI：
10.1016/j.compscitech.2020.108101
复制
发表时间：
2020-05-26
影响因子：
9.1
通讯作者：
Hong, Soon H.
中科院分区：
文献类型：
--
作者：
Kim, Joonhui;Cha, Jaemin;Hong, Soon H.
制备了含石墨烯纳米片（GNP）的碳纤维增强聚合物（CFRP）复合材料并对其进行了表征。通过与聚（4-氨基苯乙烯）（PAS）的π-π相互作用的键合提高了GNP在环氧树脂基体中的分散程度。通过紫外可见光谱和扫描电子显微镜建立了原始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其断裂韧性。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%）的最大改善用4 wt% PAS-GNP获得。CF/PAS-GNP/环氧树脂纳米复合材料的上级力学性能归因于更好的填料分散和裂纹桥接。
Carbon fiber-reinforced polymer (CFRP) composites containing graphene nanoplatelets (GNPs) were prepared and characterized. Bonding via pi-pi 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.