Study on Interface Modification and Properties of Graphene Oxide/Epoxy Composites

Graphene is currently the highest-strength material. Only single-layer-thick graphene has many excellent properties. Its emergence set off a wave of research in the scientific community in the early 21st century. The preparation of graphene/resin nanocomposites by using graphene as a reinforcing mechanism is one of the researches focuses. The introduction of graphene has endowed resin-based composites with excellent mechanical and thermal properties as well as optical and electrical functions. However, on the one hand, the bulk preparation of graphene and its affinity with resin have been restricting the application of graphene in resin matrix composites. On the other hand, as an important derivative inheriting most of the mechanical properties of graphene, graphene oxide has attracted great attention in the field of resin-based composites due to its rich oxygen-containing functional groups on the surface of the lamellae and the simple operability of batch preparation. With the deepening of research, the surface state of graphene oxide becomes more and more difficult to meet the increasing application needs. In order to achieve higher performance graphene oxide/resin composites, it is necessary to modify the surface of graphene oxide to obtain better interface performance, and the presence of a large number of functional groups also provides the possibility for its surface modification.