Synthesis of MoS 2 Nanoparticles and Improvement of Their Dispersibility and Stability in PAO Base Oils

Molybdenum disulfide nanoparticles are known by their high performance as solid lubricants and oil-additives thanks to their intrinsic structure and properties reducing wear and friction coefficient in different lubricating conditions. In this contribution, MoS 2 nanospheres were successfully synthesized via a facile solvothermal route under lower temperature (190°C). Then, these nanoparticles are used as additives in PAO base oils. The dispersibility and the stability of those nano-additives was enhanced using dispersants based on alkyl-silane moieties. The synthesized nano-aditives were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Fourier Transformation Infrared Spectroscopy (Ft-IR) and X-ray Analysis (EDX), while the dispersibility and the stability of the prepared suspension was studied using Dynamic Light Scattering technique and Turbiscan analysis.