Abstract Floating catalyst chemical vapor deposition carbon nanotube (CNT) film was intercalated into carbon fiber (CF) prepregs to fabricate hybrid composites. The effect of CNT film thickness was studied by using a 25 μm thick film and an ultrathin 2 μm film respectively. The results showed that the ultrathin CNT film interlayer had dramatically improved the compression strength of hybrid composite by 34% compared with CF/epoxy control composite owing to the altered failure modes. The damping ratio of ultrathin CNT film hybridized composite was substantially increased by two orders of magnitude, due to the energy dissipation of numerous nanoscale interconnections and interfaces. Moreover, the interlaminar properties and water resistance of the hybrid composites were all improved. Since a small amount of CNT film can significantly enhance the mechanical properties of CF/epoxy composite, this type of hybrid composite has potential application in multifunctional lightweight structures.

中文翻译：

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层间杂化CNT薄膜/碳纤维/环氧树脂复合材料的机械增强效果

摘要 将浮动催化剂化学气相沉积碳纳米管（CNT）薄膜插入碳纤维（CF）预浸料中以制备杂化复合材料。分别使用25μm厚的薄膜和2μm的超薄薄膜研究了CNT薄膜厚度的影响。结果表明，由于失效模式的改变，超薄 CNT 膜中间层与 CF/环氧树脂对照复合材料相比，混合复合材料的压缩强度显着提高了 34%。由于众多纳米级互连和界面的能量耗散，超薄 CNT 膜杂化复合材料的阻尼比显着增加了两个数量级。此外，混合复合材料的层间性能和耐水性均得到改善。