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The purification and tribological property of the synthetic magnesium silicate hydroxide modified by oleic acid
Author(s) -
Gao Kai,
Chang Qiuying,
Wang Bin,
Zhou Ningning,
Qing Tao
Publication year - 2018
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.1428
Subject(s) - magnesium , oleic acid , lubricant , materials science , hydroxide , surface modification , silicate , nanoparticle , chemical engineering , inorganic chemistry , fourier transform infrared spectroscopy , organic chemistry , chemistry , metallurgy , composite material , nanotechnology , biochemistry , engineering
Modified magnesium silicate hydroxide (MMSH) nanoparticles were synthesised hydrothermally using MgO and SiO 2 as precursors and oleic acid as modification agent under alkaline condition. The tribological performances of MMSH as lubricant additives were studied. The X‐ray diffraction and Fourier transform infrared spectroscopy spectra show that the synthetic MMSH nanoparticles contain no Mg (OH) 2 impurity and belong to the serpentine group. The tribological tests indicate that both MMSH and magnesium silicate hydroxide (MSH) without modification by oleic acid as additives can improve the antiwear property of base oil significantly. Meanwhile, MMSH presents better antiwear property than MSH which attributes to the formation of a tribofilm containing iron oxides, silicon oxides, graphite, Fe 3 C, FeOOH, and also organic compounds.