The pairs of nanofillers prepared by graphene nanoplatelets (GNPs) and multi-walled carbon nanotubes (MWCNTs) were added to the epoxy matrix in various ratios to produce hybrid epoxy nanocomposites. The effects of the presence of these nanofillers at 0.1–0.4 wt.% on the mechanical and thermal properties were tested. Likewise, carbon fiber reinforced MWCNT/GNP modified epoxy nanocomposite laminates were also manufactured and tested. The dispersion of nanofiller in the polymer matrix was evaluated by Scanning Electron Microscopy (SEM). It was determined that the hybrid composite consisting of a MWCNT:GNP ratio of 1:3 and a nanofiller ratio of 0.3 wt.% showed the best mechanical properties with a tensile strength of 75.1 MPa. The presence of GNPs and MWCNT nanofillers in epoxy/carbon fiber laminates influenced positively the tensile strength and strain but negatively the elastic modulus. Glass transition temperature of epoxy increased from 87.25°C to 114.67°C for MWCNT:GNP ratio of 1:1 (0.3 wt.%).

中文翻译：

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通过集成多壁碳纳米管和石墨烯纳米片改善碳纤维增强环氧树脂复合材料的机械性能

将由石墨烯纳米片（GNP）和多壁碳纳米管（MWCNT）制备的成对纳米填料以不同比例添加到环氧树脂基体中以产生杂化环氧纳米复合材料。测试了这些 0.1-0.4 wt.% 纳米填料的存在对机械和热性能的影响。同样，还制造并测试了碳纤维增强 MWCNT/GNP 改性环氧纳米复合材料层压板。通过扫描电子显微镜（SEM）评估纳米填料在聚合物基体中的分散情况。结果表明，MWCNT:GNP 比例为 1:3、纳米填料比例为 0.3 wt.% 的杂化复合材料表现出最佳的机械性能，拉伸强度为 75.1 MPa。环氧树脂/碳纤维层压板中 GNP 和 MWCNT 纳米填料的存在对拉伸强度和应变产生积极影响，但对弹性模量产生消极影响。当 MWCNT:GNP 比例为 1:1 (0.3 wt.%) 时，环氧树脂的玻璃化转变温度从 87.25°C 增加到 114.67°C。