PEG‐assisted solvothermal synthesis of MoS<sub>2</sub> nanosheets with enhanced tribological property
Jian‐Feng Chen, Zuxin Xu, Yun Hu, Meirong Yi
Abstract
Abstract Molybdenum disulfide (MoS 2 ) nanoparticles are widely used as oil additives for obtaining low friction and wear. In this article, MoS 2 nanosheets with ultrathin shape and structure defects were prepared by a facile solvothermal method with the aid of polyethylene glycol (PEG 200). The products were analysed by X‐ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X‐ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR). Results indicated that PEG 200 played a crucial role as the shape controller in the formation of different MoS 2 structures. Interestingly, the prepared MoS 2 perform excellent in improving the friction‐reducing and antiwear properties of oils. More importantly, the lubricating behaviour of the obtained MoS 2 nanosheets as oil additives was still effective in the harsh condition of heavy load and high temperature. Further, the excellent lubrication performance of the prepared MoS 2 was discussed based on the exfoliation into individually ultrathin nanosheets and nanosized debris, and the formation of MoS 2 ‐based tribofilm inside the wear tracks.