Journal
FRICTION
Volume 9, Issue 2, Pages 344-355Publisher
SPRINGER
DOI: 10.1007/s40544-019-0348-5
Keywords
halogen-free; dicationic ionic liquids (ILs); lubricant; tribofilm
Categories
Funding
- National Key Research and Development Program of China [2018YFB0703802]
- National Natural Science Foundation of China [51705504, 21972153, 51675512]
- China Postdoctoral Science Foundation [2019M653798]
- Youth Innovation Promotion Association of CAS [2018454]
- pre-research project in the manned space field [040101]
- Gansu Province Science and Technology Plan [18ZD2WA011]
Ask authors/readers for more resources
The study demonstrates that halogen-free dicationic ionic liquids exhibit excellent friction-reducing and anti-wear properties, especially at high temperatures. Analysis of worn surfaces reveals that the effectiveness of ILs is attributed to the formation of high quality tribofilms consisting of both tribochemical reaction and ordered absorption films.
A series of new halogen-free dicationic ionic liquids (ILs) with different alkyl chain lengths were prepared, and the relationship between the alkyl chain length, physicochemical and tribological properties of ILs, and their role as neat lubricant for steel-steel friction pairs, was investigated. Evaluation of stability during hydrolysis and copper strip corrosion test results show that synthetic ILs are stable and not corrosive to metal contacts, due to the halogen-free anions. The friction and wear test results indicate that ILs with long alkyl chains have excellent friction-reducing and anti-wear properties, especially at high temperatures. Based on the surface three-dimensional (3D) profiles, electrical contact resistance, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and the X-ray photoelectron spectrometry (XPS) analysis of the worn surfaces of steel discs, we can conclude that the efficiency of ILs is due to the formation of high quality tribofilms that consist of both tribochemical reaction and ordered absorption films.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available