Graphene oxide and nano-ZnO have excellent performance, but are prone to agglomeration in epoxy. To solve this problem, surface modification needs to be carried out. Using zinc sulfate heptahydrate as the raw material, the zinc oxide was loaded on the surface of graphene oxide. Nano-ZnO was dispersed evenly on GO by FT-IR, XRD, SEM, EDS, TG and contact angle measurement, and the GO-sheet structure can be retained, while the agglomeration is avoided and the hydrophilicity of GO is reduced. Then nano-ZnO/GO/epoxy composite is obtained by nano-ZnO loaded GO with epoxy resin. The results show that mechanical properties and thermal stability of GO/nano-ZnO/epoxy composite are increased significantly. When the mass fraction of ZnO/GO is 0.250%, the overall performance of the composite is the best. The tensile strength, tensile modulus, elongation at break, impact strength of the nano-ZnO/GO/epoxy composites are improved by 99.87%, 12.09%, 98.35%, 151.48% than pure epoxy. Compared with pure epoxy, the water absorption of nano-ZnO/GO/epoxy composite is decreased 81.48%.
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