Construction of 2D/2D graphene oxide/g‐C3N4 hybrid for enhancing the friction and wear performance of poly (phthalazinone ether sulfone ketone)

Abstract

AbstractIn this study, a novel hybrid consisted of two‐dimensional graphene oxide (GO) and graphitic carbon nitride (g‐C3N4) nanosheets were fabricated to improve the tribological performance of poly (phthalazinone ether sulfone ketone) (PPESK). The effect of the mass ratio of GO to g‐C3N4 (1:1, 1:2, and 1:3) on the microstructure of GO/g‐C3N4 was firstly studied. As the ratio was 1:2 (GO/g‐C3N4‐2), the g‐C3N4 could be homogeneously distributed on surface of GO, and the corresponding hybrid possessed many active sites. Moreover, the effect of GO/g‐C3N4 hybrid, GO, and g‐C3N4 on the tribological properties of PPESK matrix was explored systematically. Results showed that GO/g‐C3N4 demonstrated more excellent reinforcing and lubricating effect than single GO and g‐C3N4, especially for GO/g‐C3N4‐2. More importantly, as the content of GO/g‐C3N4‐2 was 0.1 wt%, the antifriction and anti‐wear performance of PPESK was improved by 77.28% and 96.9%, respectively. Moreover, the enhancement mechanisms of GO/g‐C3N4 on the tribological behaviors of PPESK were clarified by analyzing the surface morphology of the composite and the counterpart. This work might provide the guidance for the design of a novel nano‐hybrid material applied in polymer self‐lubricating composites.