Surface-Grafted Poly(ionic liquid) that Lubricates in Both Non-polar and Polar Solvents

Surface-Grafted Poly(ionic liquid) that Lubricates in Both Non-polar and Polar Solvents

We show that a surface-grafted polymer brush, 1-n-butyl-3-vinyl imidazolium bromide-based poly­(ionic liquids), is able to reduce the interfacial friction by up to 66% and 42% in dodecane and water, respectively. AFM-based force spectroscopy reveals that the polymer brush adopts distinctively differ...

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Veröffentlicht in:ACS macro letters 2021-07, Vol.10 (7), p.907-913
Hauptverfasser: Burgess, David, Li, Na, Rosik, Nicole, Fryer, Peter J, McRobbie, Ian, Zhang, Haining, Zhang, Zhenyu J
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container_end_page 913
container_issue 7
container_start_page 907
container_title ACS macro letters
container_volume 10
creator Burgess, David
Li, Na
Rosik, Nicole
Fryer, Peter J
McRobbie, Ian
Zhang, Haining
Zhang, Zhenyu J
description We show that a surface-grafted polymer brush, 1-n-butyl-3-vinyl imidazolium bromide-based poly­(ionic liquids), is able to reduce the interfacial friction by up to 66% and 42% in dodecane and water, respectively. AFM-based force spectroscopy reveals that the polymer brush adopts distinctively different interfacial conformations: swollen in water but collapsed in dodecane. Minimal surface adhesion was observed with both polymer conformations, which can be attributed to steric repulsion as the result of a swollen conformation in water or surface solvation when the hydrophobic fraction of the polymer was exposed to the dodecane. The work brings additional insight on the polymer lubrication mechanism, which expands the possible design of the polymer architecture for interfacial lubrication and modification.
doi_str_mv 10.1021/acsmacrolett.1c00174
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title Surface-Grafted Poly(ionic liquid) that Lubricates in Both Non-polar and Polar Solvents
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