Progression from graphene and graphene oxide to high-performance epoxy resin-based composite

Graphene (G) and graphene oxide (GO) possess a substantial specific surface area, excellent thermal conductivity, and remarkable mechanical strength. Integration with epoxy resin (EP) materials significantly enhances the performance of resin-based composites. EP, widely employed for its outstanding corrosion resistance, minimal shrinkage, and thermal stability, faces limitations due to inherent brittleness and singular functionality, constraining its applications. Therefore, current research emphasizes toughening and expanding the functionality of EP. The incorporation of GO (G) into EP enhances one or more of the following: flame retardancy, mechanical properties, corrosion resistance, thermal performance, wear resistance, and electrical properties. Overcoming challenges like poor dispersion and weak interfacial bonding of GO (G) requires appropriate modification. GO, rich in functional groups containing oxygen (hydroxyl, epoxy, and carboxyl), provides numerous sites for surface modification, offering ample opportunities for covalent GO modification. Conversely, non-covalent modification proves more convenient for G. This analysis comprehensively explores the structural distinctions and similarities of G(GO), their latest preparation methods, and interrelationships, with a primary focus on enhancing the performance of GO-modified epoxy composite materials.