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Title: What is the effect of lipophilic polymeric ionic liquids on friction and wear?

Abstract

In this work, methacrylate-type ionic liquid (IL) monomers containing a quaternary ammonium cation and two different counter-anions were synthesized and used as co-monomers to obtain functional poly(alkyl methacrylates) (PAMAs) as friction and wear reducing additives for lubricants. The effect of molecular weight, polymer topology (random or diblock), and IL counter anion on friction and wear behavior of polymer PAO (poly-alpha olefin) solutions have been investigated. The results were compared to those of PAO solutions additized with a small molecule, non-polymeric ionic liquid, or non-ionic copolymers containing 2-(dimethylamino)ethyl methacrylate (DMAEMA) as the polar comonomer. No clear correlation between polymer molecular weight and friction or wear behavior was observed. Random ionic liquid copolymers led to lower wear volumes than their block counterparts. Polymers containing dicyanamide (DCA) counter anion showed lower wear volume compared to those containing bis((trifluoromethyl)sulfonyl)imide (TFSI) anion. Surprisingly, none of the IL copolymers studied outperformed the DMAEMA containing block copolymer in terms of wear volume reduction, suggesting the IL moiety had no beneficial effect on wear.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technology
OSTI Identifier:
1500117
Alternate Identifier(s):
OSTI ID: 1492619; OSTI ID: 1548004
Report Number(s):
PNNL-SA-134552
Journal ID: ISSN 1381-5148
Grant/Contract Number:  
AC05-76RL01830; AC02-06CH11357; VT0604000-05450-1004897
Resource Type:
Accepted Manuscript
Journal Name:
Reactive and Functional Polymers
Additional Journal Information:
Journal Volume: 131; Journal Issue: C; Journal ID: ISSN 1381-5148
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; RAFT polymerization; ionic liquid polymethacrylates; lipophilic ionic liquid polymers; low molecular weight PILs; polymeric ionic liquids

Citation Formats

Bapat, Abhijeet P., Erck, Robert, Seymour, Bryan T., Zhao, Bin, and Cosimbescu, Lelia. What is the effect of lipophilic polymeric ionic liquids on friction and wear?. United States: N. p., 2018. Web. doi:10.1016/j.reactfunctpolym.2018.07.020.
Bapat, Abhijeet P., Erck, Robert, Seymour, Bryan T., Zhao, Bin, & Cosimbescu, Lelia. What is the effect of lipophilic polymeric ionic liquids on friction and wear?. United States. doi:10.1016/j.reactfunctpolym.2018.07.020.
Bapat, Abhijeet P., Erck, Robert, Seymour, Bryan T., Zhao, Bin, and Cosimbescu, Lelia. Mon . "What is the effect of lipophilic polymeric ionic liquids on friction and wear?". United States. doi:10.1016/j.reactfunctpolym.2018.07.020. https://www.osti.gov/servlets/purl/1500117.
@article{osti_1500117,
title = {What is the effect of lipophilic polymeric ionic liquids on friction and wear?},
author = {Bapat, Abhijeet P. and Erck, Robert and Seymour, Bryan T. and Zhao, Bin and Cosimbescu, Lelia},
abstractNote = {In this work, methacrylate-type ionic liquid (IL) monomers containing a quaternary ammonium cation and two different counter-anions were synthesized and used as co-monomers to obtain functional poly(alkyl methacrylates) (PAMAs) as friction and wear reducing additives for lubricants. The effect of molecular weight, polymer topology (random or diblock), and IL counter anion on friction and wear behavior of polymer PAO (poly-alpha olefin) solutions have been investigated. The results were compared to those of PAO solutions additized with a small molecule, non-polymeric ionic liquid, or non-ionic copolymers containing 2-(dimethylamino)ethyl methacrylate (DMAEMA) as the polar comonomer. No clear correlation between polymer molecular weight and friction or wear behavior was observed. Random ionic liquid copolymers led to lower wear volumes than their block counterparts. Polymers containing dicyanamide (DCA) counter anion showed lower wear volume compared to those containing bis((trifluoromethyl)sulfonyl)imide (TFSI) anion. Surprisingly, none of the IL copolymers studied outperformed the DMAEMA containing block copolymer in terms of wear volume reduction, suggesting the IL moiety had no beneficial effect on wear.},
doi = {10.1016/j.reactfunctpolym.2018.07.020},
journal = {Reactive and Functional Polymers},
number = C,
volume = 131,
place = {United States},
year = {2018},
month = {10}
}