Tribochemistry of imidazolium and phosphonium bis(oxalato)borate ionic liquids: Understanding the differences

被引：17
|
作者：
Rohlmann, Patrick [1 ]
Black, Jeffrey J. [2 ]
Watanabe, Seiya [3 ,9 ]
Leckner, Johan [1 ,4 ]
Shimpi, Manishkumar R. [5 ,6 ]
Rutland, Mark W. [2 ,3 ,7 ]
Harper, Jason B. [2 ]
Glavatskih, Sergei [1 ,2 ,8 ]
机构：
[1] KTH Royal Inst Technol, Dept Engn Design, SE-10044 Stockholm, Sweden
[2] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia
[3] KTH Royal Inst Technol, Surface & Corros Sci, SE-10044 Stockholm, Sweden
[4] Axel Christiernsson Int AB, SE-44911 Nol, Sweden
[5] Lulea Univ Technol, Chem Interfaces, SE-97187 Lulea, Sweden
[6] Stockholm Univ, Dept Mat & Environm Chem, Stockholm, Sweden
[7] Ecole Cent Lyon, Lab Tribol & Dynam Syst, F-69134 Ecully, France
[8] Univ Ghent, Dept Electromech Syst & Met Engn, B-9052 Ghent, Belgium
[9] Osaka Univ, 1-1 Machikaneyama, Toyonaka, Osaka 5600043, Japan
来源：
TRIBOLOGY INTERNATIONAL | 2023年 / 181卷
基金：
瑞典研究理事会; 澳大利亚研究理事会;
关键词：
Ionic liquid; Friction; Wear; Decomposition; Tribofilm; ToF-SIMS; HALOGEN-FREE; TRIBOLOGICAL PROPERTIES; LUBRICANT ADDITIVES; FUNCTIONAL-GROUPS; NEAT LUBRICANTS; FRICTION; SOLVENTS; CATIONS; BORON; PERFORMANCE;
D O I：
10.1016/j.triboint.2023.108263
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Lubrication properties of imidazolium and phosphonium bis(oxalato)borate ionic liquids (ILs) are compared in a reciprocating sliding contact at 80 degrees C and 140 degrees C. Both the influence of the alkyl chain length and the cation architecture on friction, wear and lubricant breakdown are investigated. Imidazolium ILs showed lower friction than phosphonium ILs though only phosphonium-based ILs reduced wear. A longer alkyl chain reduced friction only in the case of the imidazolium-based ILs. Analysis of the wear scars was consistent with chemical breakdown solely of the anion. Chemical changes in the ILs after the tribotests were more pronounced for imidazolium-based ILs, and comparison of breakdown and tribofilm formation implicated catalysis by the imidazolium center, which, in turn, had a strong dependence on the surface self-assembly.
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页数：11
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