Research on the Characteristics of Greases of Nano - Modified MoS2 Additive on the Basis of CTAB

Abstract

The effects of nano-MoS2 as additive and CTAB modified MOS2 as additive on the properties and mechanism of Lithium Grease were investigated. The maximum bite-free load (PB), sintering load (PD), cone penetration, Shear Stability, drop point and Steel Mesh separation of grease were tested according to the performance test standard of Grease Quality Index. The effects of nano-MoS2 and CTAB on the physical and chemical properties of lithium-based Grease were studied by comparing the physical and chemical data of three samples: lithium-based Grease without additives, lithium-based grease with nano-MoS2 and lithium-based grease with CTAB. The surface structure of nano-MoS2 modified by CTAB was analyzed by Scanning electron microscope method. The results showed that CTAB was uniformly adhered to the surface of nano-MoS2, and the surface energy of nano-MoS2 was decreased, it helps to disperse the grease more evenly and stably. The results show that CTAB can modify the surface of MOS2 and reduce the surface energy of MOS2, and the surface energy of MOS2 can be decreased by using Fourier infrared scanner. Combining the physical and chemical properties of the Lithium Grease with the SEM and Fourier infrared scanning data, the nano-MoS2 modified by CTAB as additive can improve the performance of lubricating grease better than nano-MoS2 without surface modification, and disperse in lubricating grease more evenly and stably, thus, the colloidal structure of the lubricating grease is more stable.