纳米氧化锌负载氧化石墨烯/环氧树脂复合材料性能研究

氧化石墨烯(GO)和纳米氧化锌(ZnO)具有优异的性能,但在环氧树脂中容易出现团聚现象,为解决这一问题,必须对其进行表面改性。以七水合硫酸锌为原料,将ZnO负载到GO表面,通过FT-IR,XRD,SEM,EDS,TG和接触角测试,纳米ZnO均匀分散在GO基体上,并可以在不改变GO片层结构的条件下,改善GO的团聚问题的同时降低GO的亲水性。然后将ZnO负载GO与环氧树脂制备纳米ZnO负载GO/环氧复合材料。结果表明:纳米ZnO负载GO/环氧复合材料力学性能和热稳定性明显提高,当ZnO/GO加入量为0.250%(质量分数)时复合材料综合性能最佳,拉伸强度、拉伸模量、断裂伸长率和冲击强度分别比纯环氧树脂提高了99.87%,12.09%,98.35%和151.48%,吸水率比纯环氧树脂降低了81.48%。

Properties of Graphene Oxide Loaded by Nano-ZnO/Epoxy Resin Composites

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 hep-tahydrate 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 com-posite are increased significantly.When the mass fraction of ZnO/GO is 0.250%,the overall perform-ance 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%, 1 5 1.48% than pure epoxy.Compared with pure epoxy,the water absorption of nano-ZnO/GO/epoxy composite is decreased 81.48%.