Weathering performance of polyurethane nanocomposite coatings containing modified graphene oxide nanoparticles

In this study, the weathering performance of polyurethane (PU) topcoats loaded with modified graphene oxide (MGO) nanoparticle is investigated. Graphene oxide (GO) was treated with a conventional organic ultraviolet absorber (UVA). Fourier transform infra-red spectroscopy (FTIR) was employed to prove the surface modification of graphene oxide (GO) nanoparticles. The results showed that UVA was more efficiently adsorbed on the surface of GO in acidic environment. Color changes and gloss loss values of variously modified PU coatings after being exposed to QUV chamber revealed that MGO significantly improved the weathering performance of PU nanocomposite coatings