The assembling of two carbonaceous nanomaterials to fabricate 3D hierarchical graphene-carbon nanotube hybrid is the superlative strategy to synergistically impart electrical and mechanical properties to polymers. In the present study, we have evaluated the effects of nanoscale hybridization of graphene oxide (GO) and multi-wall carbon nanotube (MWCNT) on the electrical, mechanical and thermal properties of polyetherimide (PEI) nanocomposites reinforced by GO-MWCNT hybrid. Synthesis of GO-MWCNT hybrid was confirmed by various spectroscopic measurements. The inclusion of GO-MWCNT hybrid to PEI endows optimum dispersion and better interfacial interactions between GO-MWCNTs and PEI matrix and thus remarkably improved the conductivity, tensile properties and thermal stability of PEI. When the mass ratio of GO to MWCNT is 1:1 and the total filler loading is only 2 wt%, the DC conductivity of the nanocomposite films enhanced by 6 orders of magnitude, the tensile strength increased by fourfold and the Young’s modulus increased by sixfold compared to those of pure PEI. The reinforcement efficiency of the GO-MWCNT (1:1) hybrid in terms of the modulus of the nanocomposite was predicted using modified Halpin–Tsai modelling and compared with the experiment results. The present PEI nanocomposite materials could significantly fulfil the demands raised by the aerospace community.

中文翻译：

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在多壁碳纳米管杂化增强聚醚酰亚胺纳米复合材料中原位合成氧化石墨烯，具有改善的电学、机械和热性能

组装两种碳质纳米材料以制造 3D 分层石墨烯 - 碳纳米管混合物是协同赋予聚合物电气和机械性能的最佳策略。在本研究中，我们评估了氧化石墨烯 (GO) 和多壁碳纳米管 (MWCNT) 的纳米级杂化对 GO-MWCNT 杂化增强的聚醚酰亚胺 (PEI) 纳米复合材料的电学、机械和热性能的影响。通过各种光谱测量证实了 GO-MWCNT 杂化物的合成。将 GO-MWCNT 杂化物加入 PEI 赋予了 GO-MWCNTs 和 PEI 基体之间的最佳分散和更好的界面相互作用，从而显着提高了 PEI 的导电性、拉伸性能和热稳定性。当 GO 与 MWCNT 的质量比为 1 时：与纯PEI相比，纳米复合薄膜的DC电导率提高了6倍，拉伸强度提高了四倍，杨氏模量提高了六倍。使用改进的 Halpin-Tsai 模型预测 GO-MWCNT (1:1) 混合体在纳米复合材料模量方面的增强效率，并与实验结果进行比较。目前的 PEI 纳米复合材料可以显着满足航空航天界提出的需求。1) 使用改进的 Halpin-Tsai 模型预测纳米复合材料模量的混合，并与实验结果进行比较。目前的 PEI 纳米复合材料可以显着满足航空航天界提出的需求。1) 使用改进的 Halpin-Tsai 模型预测纳米复合材料模量的混合，并与实验结果进行比较。目前的 PEI 纳米复合材料可以显着满足航空航天界提出的需求。