Investigation of the lubricity and antiwear behavior of guanidinium ionic liquids at high temperature

• Published in: Tribology international Vol. 114; pp. 65 - 76
• Main Authors: Huang, Guowei, Yu, Qiangliang, Cai, Meirong, Zhou, Feng, Liu, Weimin
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2017; Elsevier BV
• Subjects: Adsorbability; Antifriction; Electrochemical; High temperature; Inorganic chemistry; Ionic liquids; Lubricants & lubrication; Lubricating property; Lubrication; Lubricity; Studies; Thermal stability; Thermogravimetric analysis; Wide temperature range; Adsorbability; Lubricating property; Wide temperature range; Thermal stability; Electrochemical
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2017.04.010

The guanidinium ionic liquids (GILs) are synthesized and have better thermal stability than perfluoropolyether (PFPE) and 1-hexyl-3-methylimidazolium bis(trifluoromethyl sulfony)imide (LF106) according to thermogravimetric analysis. GILs possess better antifriction and antiwear performance in wide temperature range (from RT to 300°C) than PFPE and LF106. Meanwhile, GILs have the smaller weight loss and still perform good lubricating property after the treatment of high-temperature. Then, energy dispersive spectrometer (EDS), corrosion, electrochemical and quartz crystal monitor tests are carried out to investigate the influence of adsorbability of cations to the lubricating property of GILs and LF106 under different temperature conditions. [Display omitted] •Guanidinium ionic liquids (GILs) exhibit higher temperature thermal stability than PFPE and LF106.•GILs perform excellent lubricating performance in wide temperature range (from RT to 300°C) comparing with PFPE and LF106.•GILs also exhibit better lubricating performance than PFPE and LF106 after the high temperature treatment (200˚C) for 100h.