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Tribological behaviour of protic ionic liquids with ammonium salts modified LABSA as lubricants and additives
Author(s) -
Zhao Qin,
Zhao Gaiqing,
Zhang Ming,
Wang Xiaobo,
Liu Weimin
Publication year - 2013
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.1204
Subject(s) - tribology , ionic liquid , x ray photoelectron spectroscopy , materials science , scanning electron microscope , chemical engineering , lubrication , ammonium , ionic bonding , amine gas treating , inorganic chemistry , chemistry , organic chemistry , composite material , ion , engineering , catalysis
Two typical protic ionic liquids with ammonium salts modified linear alkylbenzene sulfonic acid (LABSA) were synthesised, and their tribological behaviours used as both lubricants compared with PAO10 and additives in PAO10 were evaluated with an Optimol SRV‐I oscillating reciprocating friction and wear tester. The results show that the two novel protic ionic liquids with ammonium salts modified LABSA exhibited excellent friction‐reducing and anti‐wear properties as lubricants and can also significantly improve the tribological performance of the base fluids as friction modifier additives. The worn surfaces were characterised by scanning electron microscope and X‐ray photoelectron spectroscopy, indicating that the excellent anti‐wear and friction‐reducing performance could attributed to the boundary lubrication films that could contain both the tribochemical film composed of organic amine decomposed from the protic ionic liquids with ammonium salts and the stable chemical absorbed film through the interactions between the sulfonate anions and surface metallic atoms during the sliding process. Copyright © 2012 John Wiley & Sons, Ltd.