Combination of 1T-MoS2 and CuNi-MOF as an efficient lubricant additive

Nanoparticles are of great significance to enhance tribological performances and can be employed as effective lubricant additives. 1T-MoS 2 has been widely applied in many fields. However, it is rarely studied in lubrication application. In this study, a novel core-shell lubricant additive was prepared by combining CuNi-MOF and 1T-MoS 2 via a facile hydrothermal method. The as-prepared CuNi-MOF@1T-MoS 2 exhibited a flower-like structure. Both experimental and theoretical calculation results showed the interlamellar interactions between the layered 1T-MoS 2 and CuNi-MOF sheets. Tribological properties of PEG200 containing CuNi-MOF@1T-MoS 2 were systematically investigated by a four-ball test machine. In comparison with PEG200, the friction coefficient and wear scar diameter were remarkably reduced by 56.8 % and 34.0 %, respectively. Therefore, the combination of 1T-MoS 2 and CuNi-MOF presents a promising candidate for enhancing the tribological properties of PEG200.