A core-shell structured ZrO@GO hybrid was fabricated and incorporated onto carbon fiber via dip-coating for the first time for effectively enhancing the interfacial adhesion of epoxy composites. ZrO@GO functionalized fiber composite exhibits the optimal interfacial shear strength, with 47.5%, 21.8% and 16.8% augmentations over that of untreated fiber, only epoxy sizing coated fiber and silane coupling agent-encapsulated ZrO decorated fiber composites, suggesting that GO could serve as a new coupling agent for enhancing the affinity of inorganic nanoparticles with resin component instead of the traditional silane coupling agent. The reinforcing mechanisms are ascribed to the improved resin wettability, abundant functional groups offered by GO for increasing multiple interactions with epoxy resin and the formation of a mobile network absorbing energy. It is believed that the core-shell ZrO@GO structure, with inner rigid particles and outer flexible coupling agent, can fully utilize the synergistic enhancement effect of different components and provide new insights into designing nano-structured interphase for the improvement in interfacial adhesion of fiber-polymer composites.

中文翻译：

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核壳ZrO2@GO杂化材料可有效改善碳纤维/环氧树脂复合材料的界面粘合力

首次制备了核壳结构的ZrO@GO杂化材料，并通过浸涂将其结合到碳纤维上，以有效增强环氧复合材料的界面粘附力。 ZrO@GO功能化纤维复合材料表现出最佳的界面剪切强度，比未处理的纤维、仅环氧树脂浆料涂覆的纤维和硅烷偶联剂封装的ZrO修饰的纤维复合材料分别提高了47.5%、21.8%和16.8%，表明GO可以用作作为一种新型偶联剂，用于代替传统的硅烷偶联剂，增强无机纳米颗粒与树脂组分的亲和力。增强机制归因于改善的树脂润湿性、GO提供的丰富官能团以增加与环氧树脂的多重相互作用以及吸收能量的移动网络的形成。我们认为，内有刚性颗粒、外有柔性偶联剂的核壳ZrO@GO结构可以充分利用不同组分的协同增强效应，为设计纳米结构界面以提高界面粘附力提供新的见解。纤维聚合物复合材料。