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

David Burgess; Na Li; Nicole Rosik; Peter J Fryer; Ian McRobbie; Haining Zhang; Zhenyu J Zhang

doi:10.1021/acsmacrolett.1c00174

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

David Burgess, Na Li, Nicole Rosik, Peter J Fryer, Ian McRobbie, Haining Zhang, Zhenyu J Zhang

Chemical Engineering

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Abstract

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.

Original language	English
Pages (from-to)	907-913
Number of pages	7
Journal	ACS Macro Letters
Volume	10
Issue number	7
Early online date	28 Jun 2021
DOIs	https://doi.org/10.1021/acsmacrolett.1c00174
Publication status	Published - 20 Jul 2021

Bibliographical note

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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Cite this

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

abstract = "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.",

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AU - Burgess, David

AU - Li, Na

AU - Rosik, Nicole

AU - Fryer, Peter J

AU - McRobbie, Ian

AU - Zhang, Haining

AU - Zhang, Zhenyu J

PY - 2021/7/20

Y1 - 2021/7/20

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AB - 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.

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

Abstract

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