Epoxy resins, as the most important thermosetting matrix of carbon fiber reinforced polymer (CFRP) composites, are widely used in the structural field, but the highly intrinsic brittleness of epoxy resins greatly limits their application. Therefore, it is urgent to develop new method to prepare high‐performance epoxy composites. In this research, GO riched with rigid short‐chain structure epoxy group on its surface was synthesized by chemically grafting dopamine, hexachlorocyclotriphosphazene and glycidol successively. Then the modified nanofillers were incorporated into the epoxy matrix to prepare high‐performance nanocomposites. The effect of epoxy‐rich GO nanosheets as fillers on mechanical properties of aerospace grade epoxy was studied. The results revealed that the epoxy‐rich GO could effectively optimize the performance of epoxy resins owing to forming the rigid structured interphase. The tensile strength and elongation at break of the nanocomposites were up to 113 MPa and 7.6% with 0.075 wt% additives, respectively, which greatly surpassed the value reported by the limited researches on strengthening epoxy with GO and its derivate nanofillers. Therefore, instructive idea and effective method were provided to obtain high‐performance polymer nanocomposite matrix in this study.

中文翻译：

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通过使用富含环氧的氧化石墨烯构建刚性结构的中间相来实现高性能的环氧纳米复合材料

环氧树脂作为碳纤维增强聚合物（CFRP）复合材料最重要的热固性基质，已在结构领域广泛使用，但是环氧树脂的高固有脆性极大地限制了其应用。因此，迫切需要开发一种制备高性能环氧复合材料的新方法。在这项研究中，通过化学接枝多巴胺，六氯环三磷腈和缩水甘油，合成了表面上具有刚性短链结构环氧基的GO。然后将改性的纳米填料掺入环氧基质中以制备高性能的纳米复合材料。研究了富含环氧的GO纳米片作为填料对航空航天级环氧树脂力学性能的影响。结果表明，由于形成了刚性结构化的中间相，富含环氧的GO可以有效地优化环氧树脂的性能。含0.075 wt％添加剂的纳米复合材料的抗张强度和断裂伸长率分别高达113 MPa和7.6％，大大超过了有限的研究用GO及其衍生的纳米填料增强环氧树脂的报道值。因此，本研究为获得高性能聚合物纳米复合材料提供了指导思想和有效方法。这大大超过了有限的研究所报道的用GO及其衍生的纳米填料增强环氧的价值。因此，本研究为获得高性能聚合物纳米复合材料提供了指导思想和有效方法。这大大超过了有限的研究所报道的用GO及其衍生的纳米填料增强环氧的价值。因此，本研究为获得高性能聚合物纳米复合材料提供了指导思想和有效方法。