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PEG‐assisted solvothermal synthesis of MoS 2 nanosheets with enhanced tribological property
Author(s) -
Chen Jianfeng,
Xu Zuxin,
Hu Yun,
Yi Meirong
Publication year - 2020
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.1501
Subject(s) - materials science , molybdenum disulfide , x ray photoelectron spectroscopy , fourier transform infrared spectroscopy , exfoliation joint , scanning electron microscope , chemical engineering , lubrication , transmission electron microscopy , polyethylene glycol , nanoparticle , solvothermal synthesis , peg ratio , nanotechnology , composite material , graphene , finance , engineering , economics
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.