Lipophilic Polymethacrylate Ionic Liquids as Lubricant Additives
Abstract
Despite the growing research field of polymeric ionic liquids used as materials for applications such as electrolytes and energy materials, catalysts, separation aides, and carbon materials, reports of lipophilic polymeric ionic liquids are essentially nonexistent. Oil-miscible single molecule ionic liquids (ILs) are reported to perform well as neat lubricants and as additives in lubricating base oils. In this work, methacrylate type ionic liquid (IL) monomers containing ammonium or imidazolium cations and two different counter-anions were synthesized and used as co-monomers to obtain functional poly(alkyl methacrylates) (PAMAs) as viscosity index improvers (VII) additives for lubricants. The structure of the IL, including the cation, the anion, and the spacer’s length separating the IL from the methacrylate group, plays an important role in the resulting polymer solubility in PAO (poly-alpha olefin), solution rheology, and friction-and-wear behavior. Depending on the IL structure, VIIs containing up to 20 % mole IL are soluble in PAO (grade 4), and demonstrate friction-and-wear reduction, compared to a conventional oil-soluble PAMA. Notably, wear volume reduction of up to 80% compared to the oil-soluble control poly(dodecyl methacrylate) is observed.
- Authors:
-
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Deakin Univ., Waurn Ponds, Vic (Australia
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- OSTI Identifier:
- 1493697
- Alternate Identifier(s):
- OSTI ID: 1496562
- Report Number(s):
- PNNL-SA-134547
Journal ID: ISSN 0014-3057; 146360
- Grant/Contract Number:
- AC02-06CH11357; AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- European Polymer Journal
- Additional Journal Information:
- Journal Volume: 108; Journal ID: ISSN 0014-3057
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; ionic liquid; ionic liquid polymers; polymethacrylates; viscosity index improvers; polymeric ionic liquids
Citation Formats
Bapat, Abhijeet P., Erck, Robert, Seymour, Bryan T., Zhao, Bin, and Cosimbescu, Lelia. Lipophilic Polymethacrylate Ionic Liquids as Lubricant Additives. United States: N. p., 2018.
Web. doi:10.1016/j.eurpolymj.2018.08.026.
Bapat, Abhijeet P., Erck, Robert, Seymour, Bryan T., Zhao, Bin, & Cosimbescu, Lelia. Lipophilic Polymethacrylate Ionic Liquids as Lubricant Additives. United States. https://doi.org/10.1016/j.eurpolymj.2018.08.026
Bapat, Abhijeet P., Erck, Robert, Seymour, Bryan T., Zhao, Bin, and Cosimbescu, Lelia. Wed .
"Lipophilic Polymethacrylate Ionic Liquids as Lubricant Additives". United States. https://doi.org/10.1016/j.eurpolymj.2018.08.026. https://www.osti.gov/servlets/purl/1493697.
@article{osti_1493697,
title = {Lipophilic Polymethacrylate Ionic Liquids as Lubricant Additives},
author = {Bapat, Abhijeet P. and Erck, Robert and Seymour, Bryan T. and Zhao, Bin and Cosimbescu, Lelia},
abstractNote = {Despite the growing research field of polymeric ionic liquids used as materials for applications such as electrolytes and energy materials, catalysts, separation aides, and carbon materials, reports of lipophilic polymeric ionic liquids are essentially nonexistent. Oil-miscible single molecule ionic liquids (ILs) are reported to perform well as neat lubricants and as additives in lubricating base oils. In this work, methacrylate type ionic liquid (IL) monomers containing ammonium or imidazolium cations and two different counter-anions were synthesized and used as co-monomers to obtain functional poly(alkyl methacrylates) (PAMAs) as viscosity index improvers (VII) additives for lubricants. The structure of the IL, including the cation, the anion, and the spacer’s length separating the IL from the methacrylate group, plays an important role in the resulting polymer solubility in PAO (poly-alpha olefin), solution rheology, and friction-and-wear behavior. Depending on the IL structure, VIIs containing up to 20 % mole IL are soluble in PAO (grade 4), and demonstrate friction-and-wear reduction, compared to a conventional oil-soluble PAMA. Notably, wear volume reduction of up to 80% compared to the oil-soluble control poly(dodecyl methacrylate) is observed.},
doi = {10.1016/j.eurpolymj.2018.08.026},
journal = {European Polymer Journal},
number = ,
volume = 108,
place = {United States},
year = {Wed Aug 15 00:00:00 EDT 2018},
month = {Wed Aug 15 00:00:00 EDT 2018}
}
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Works referencing / citing this record:
Synergistic effects of phosphate ionic liquids and octadecylaminen‐oleoyl sarcosinate as lubricating grease additives
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