This research paper explores and highlights the effect of aspect ratio (AR) and specific surface area (SSA) of Graphene Nano-Platelets (GNPs) on the interlaminar fracture behavior of carbon fiber-reinforced polymer (CFRP) composites. Various types of GNPs having different aspect ratios were dispersed in an epoxy system by using the three roll milling technique at a fixed content of 0.5 wt.%. The blends resulting from this procedure were used for the impregnation of carbon fabrics aiming in obtaining nano-modified epoxy pre-impregnated fabrics (Prepregs). The prepreg material was used for the fabrication of CFRPs by using the autoclave technique. The resistance of composites to interlaminar crack propagation was measured by performing Mode I and II fracture tests utilizing the DCB and ENF configurations. The fracture surfaces of the tested samples were investigated post-mortem using Scanning Electron Microscopy (SEM). We show that the graphene Nano-Platelets with higher AR and SSA combined lead to enhanced interlaminar fracture toughness under mode I and mode II loading as compared to the unmodified composite system.

该研究论文探索并强调了石墨烯纳米板（GNP）的纵横比（AR）和比表面积（SSA）对碳纤维增强聚合物（CFRP）复合材料的层间断裂行为的影响。通过使用三辊研磨技术以0.5重量％的固定含量将具有不同纵横比的各种类型的GNP分散在环氧体系中。由该方法得到的共混物用于碳织物的浸渍，旨在获得纳米改性的环氧预浸渍织物（Prepregs）。预浸材料通过高压釜技术用于制造CFRP。通过使用DCB和ENF配置执行模式I和II断裂测试，可以测量复合材料对层间裂纹扩展的抵抗力。使用扫描电子显微镜（SEM）在事后研究测试样品的断裂表面。我们表明，与未改性的复合材料体系相比，具有较高的AR和SSA组合的石墨烯纳米片在模式I和模式II加载下导致增强的层间断裂韧性。