The chemical graft method was used to connect modified graphene oxide (GO) and Fe3O4 through covalent bonds. The different mass fraction (0wt%, 0.3wt%, 0.5wt%, 1wt%, 2wt%) of GO@ Fe3O4 was added to the organic coatings, and the magnetic field induction technology was used to realize the directional arrangement of magnetized graphene in the composite coatings. The GO@ Fe3O4 was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and a transmission electron microscopy (TEM). The characterization results show that Fe3O4 is successfully loaded on the surface of GO. In order to explore the influence of the composite coatings on the tribological properties, the HSR-2M reciprocating friction machine was used to study the tribological properties of the composite coatings. The results show that the friction coefficient of 0.5wt% directional GO@Fe3O4 composite coatings is the lowest, which is 0.25. The excellent tribological properties of the aligned composite coating come from its ability to quickly form a uniform and continuous transfer film on the friction counterpair, which avoids direct friction between the friction counterpair and the coating. In this study, the chemical graft method was used to connect modified graphene oxide (GO) and Fe3O4 through covalent bonds. The different mass fraction (0wt%, 0.3wt%, 0.5wt%, 1wt%, 2wt%) of GO@ Fe3O4 was added to the organic coatings, and the magnetic field induction technology was used to realize the directional arrangement of magnetized graphene in the composite coatings. The GO@ Fe3O4 was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and a transmission electron microscopy (TEM). The characterization results show that Fe3O4 is successfully loaded on the surface of GO. In order to explore the influence of the composite coatings on the tribological properties, the HSR-2M reciprocating friction and wear machine was used to study the tribological properties of the composite coatings. The results show that the friction coefficient of 0.5wt% directional GO@Fe3O4 composite coatings is the lowest, which is 0.25. The excellent tribological properties of the aligned composite coating come from its ability to quickly form a uniform and continuous transfer film on the friction counterpair, which avoids direct friction between the friction counterpair and the coating.

Tribological performance studies of waterborne polyurethane coatings with aligned modified Graphene oxide@Fe3O4

ACS Fall 2021

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