Constructing continuous carbon network in insulative polymer matrix is of great significance for carbon nanocomposites to be used in a huge range of applications. In this study, multifunctional reduced graphene oxide (RGO)/carbon nanotubes (CNTs)/epoxy resin (EP) nanocomposites based on carbon nanohybrid preform is prepared via vacuum-assisted infiltration route. The roles of CNTs and 2-ethyl-4-methylimidazole (EMI) playing in carbon nanohybrid preform, chemically and physically, are identified to elucidate the structure and properties of the RGO/CNTs/EP nanocomposites. The much better thermal stability of RGO/CNTs preform testifies that GO sheet was chemically reduced by EMI. The as-made nanocomposites were examined with respect to mechanical reinforcement, thermal and electrical conductance. The interfacial compatibility and bonding between carbon nanohybrid framework and EP are achieved, which is responsible for the increased mechanical properties at the optimized formulations of carbon nanohybrid preform. The significantly enhanced electrical and thermal conductivities of carbon nanocomposites are ascribed to the interconnected sp²-hybridized carbon network consisting of the isolated graphitic domains of RGO sheets and structurally intact CNTs bridges throughout the polymer bulk.

在绝缘聚合物基体中构建连续的碳网络对于碳纳米复合材料的广泛应用具有重要意义。在这项研究中，通过真空辅助渗透途径制备了基于碳纳米杂化预制棒的多功能还原氧化石墨烯（RGO）/碳纳米管（CNT）/环氧树脂（EP）纳米复合材料。CNT和2-乙基-4-甲基咪唑（EMI）在碳纳米混合预成型坯中的化学和物理作用，被认为可阐明RGO / CNT / EP纳米复合材料的结构和性能。RGO / CNTs瓶坯的热稳定性好得多，这证明GO板已被EMI化学还原。检查了制成的纳米复合材料的机械增强，导热和导电性。碳纳米杂化骨架与EP之间的界面相容性和键合得以实现，这是在碳纳米杂化预制棒的优化配方下提高机械性能的原因。碳纳米复合材料的电导率和导热率显着提高归因于相互连接的sp由RGO薄板的孤立石墨域和结构完整的CNT桥组成的^2-杂交碳网络贯穿整个聚合物本体。