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Tn recent years, graphene/polyurethane nanocomposites have attracted much attention due to their superior comprehensive properties. Incorporating graphene or its derivatives into I〉U matrix could significantly improve the physical mechanical, thermal, electromagnetic and other properties, which meets the special requirements of high-performance and multi-functional polymer composites. Tn this paper, the functional modification methods of graphene nanosheets, including covalent modification and non-covalent modification were first introduced. Furthermore, the fabrication processes of graphene/poly urethane nanocomposites, including in-situ polymerization, solution blending, melt blending, aqueous (latex) blending, etc., were briefly introduced. The recent research progress of graphene/poly urethane composites in mechanical, electrical, dielectric, thermal, gas barrier, flame retardant, electromagnetic interference shielding and corrosion resistant properties were all reviewed in detail. The future challenges and development prospects of high-performance graphene/poly urethane nanocomposites were also prospected. [ABSTRACT FROM AUTHOR]

Graphene has excellent material properties and a wide range of applications. The preparation technology of graphene-based materials has been highly valued. The key preparation techniques of graphene-based materials, such as surface functionalization, gamma ray irradiation, self-assembly, template synthesis, 3 D printing and powder metallurgy, were introduced in this paper. The technical principles of each process, preparation techniques and advantages and disadvantages of the resulting product were described. In order to better realize the application value of graphene-based materials, the next research was prospected. [ABSTRACT FROM AUTHOR]