MoS2‐Functionalized Graphene Composites—Potential Replacement for Lubricant Friction Modifier and Anti‐Wear Additives

AGOC(n)/MoS 2 composites are synthesized by a facile and effective hydrothermal method. Different mass ratios of AGOC(n) to MoS 2 are prepared for producing AGOC(n)/MoS 2 composites and their tribological properties at different weight percentages in Group III petroleum‐based oil are investigated. The as‐prepared composites are characterized using Fourier transform infrared (FTIR), field emission scanning electron microscope/energy dispersive X‐ray (FESEM/EDX), Raman, X‐ray diffraction (XRD), and X‐ray photoelectron spectroscopy (XPS). The performance of the AGOC(n)/MoS 2 composites as lubricant additives is investigated on four‐ball testers. The results indicate that AGOC(n)/MoS 2 could improve the friction‐reduction and antiwear properties of the petroleum‐based oil. In particular, the AGOC14/MoS 2 composite with a 1:1 mass ratio shows the highest reduction of friction coefficient and wear scar diameter by 53% and 63%, respectively. The excellent tribological behavior of the composites is attributed to the synergetic effect and unique layered structure of AGOC(n) and MoS 2 .