Frictional behaviour of imidazolium sulfate ionic liquid additives under mixed slide-to-roll conditions

Pejaković, Vladimir (author), Kalin, Mitjan (author)

Ionic liquids are getting increased attention due to their potential use as additives or lubricants. One of parameters that influence their performance is anion alkyl chain length. Three chain lengths in imidazolium sulfate ionic liquids were varied in three different types of tests in order to study the friction performance in all lubrication regimes at different shear rates. Results show significant effect of alkyl chain length on friction behaviour and surface topography. The shortest chain length ionic liquid had the poorest friction performance whilst longer alkyl chain lengths performed significantly better, which was evidenced by the electrical contact resistance. Although friction behaviour was not generally reduced with ionic liquid mixtures, clear tribological improvement was observed in high shear conditions depending on alkyl chain length. Atomic force microscopy (AFM) analysis revealed correlation between ionic liquid chemistry and surface topography of samples after the experiments, with significantly increased roughness for short chain ionic liquid mixture.

• Language: English
• Keywords: friction, ionic liquid, alkyl chain length, roughness, topography
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Submitted Version
• Year: 2015
• Number of pages: Str. 463-477
• Numbering: Vol. 27, iss. 8
• PID: 20.500.12556/RUL-106782
• UDC: 531.43(045)
• ISSN on article: 0954-0075
• DOI: 10.1002/ls.1289
• COBISS.SI-ID: 13929499
• Publication date in RUL: 18.03.2019

Record is a part of a journal

• Title: Lubrication science
• Shortened title: Lubr. sci.
• Publisher: Leaf Coppin
• ISSN: 0954-0075
• COBISS.SI-ID: 2144539

Secondary language

• Language: Slovenian
• Keywords: trenje, ionska tekočina, alkilna dolžine verige, hrapavost, topografija

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0231
• Name: Tribologija