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Covalent coupling of ionic liquid to carbon nanotubes: preparation and tribological properties

Published online by Cambridge University Press:  04 June 2014

Triinu Taaber
Affiliation:
University of Tartu, Institute of Chemistry, 14a Ravila St.,50411, Tartu, Estonia. University of Tartu, Institute of Physics and Estonian Nanotechnology Competence Center,142 Riia St., 51014, Tartu, Estonia.
Kaija Põhako-Esko
Affiliation:
University of Tartu, Institute of Chemistry, 14a Ravila St.,50411, Tartu, Estonia. University of Tartu, Institute of Physics and Estonian Nanotechnology Competence Center,142 Riia St., 51014, Tartu, Estonia.
Urmas Joost
Affiliation:
University of Tartu, Institute of Physics and Estonian Nanotechnology Competence Center,142 Riia St., 51014, Tartu, Estonia.
Kadi Külasalu
Affiliation:
University of Tartu, Institute of Physics and Estonian Nanotechnology Competence Center,142 Riia St., 51014, Tartu, Estonia.
Mikk Antsov
Affiliation:
University of Tartu, Institute of Physics and Estonian Nanotechnology Competence Center,142 Riia St., 51014, Tartu, Estonia.
Maksim Antonov
Affiliation:
Tallinn University of Technology, Department of Mechanical Engineering, 5 Ehitajate tee St., 19086, Tallinn, Estonia
Renno Veinthal
Affiliation:
Tallinn University of Technology, Department of Mechanical Engineering, 5 Ehitajate tee St., 19086, Tallinn, Estonia
Kristjan Saal
Affiliation:
University of Tartu, Institute of Physics and Estonian Nanotechnology Competence Center,142 Riia St., 51014, Tartu, Estonia.
Rünno Lõhmus
Affiliation:
University of Tartu, Institute of Physics and Estonian Nanotechnology Competence Center,142 Riia St., 51014, Tartu, Estonia.
Uno Mäeorg
Affiliation:
University of Tartu, Institute of Chemistry, 14a Ravila St.,50411, Tartu, Estonia.
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Abstract

A new approach for functionalising oxidised MWCNTs using hydroxylated imidazolium bromide via esterification reaction is reported. The bromide anion of a functionalised MWCNTs was exchanged with bis(trifluoromethanesulfonyl) imide (TFSI) through a metathesis reaction to improve its solubility in the IL medium. Composite was characterized with IR, XPS, EDX and TGA analysis, which clearly confirmed that the MWCNTs were functionalized with IL. For potential application as lubricant, the tribological properties of the IL-functionalised MWCNTs (MWCNT-IL) were also evaluated. It was confirmed that even low concentrations of MWCNT-IL composite in ILs causes a significant improvement in the anti-wear and friction properties.

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Articles
Copyright
Copyright © Materials Research Society 2014 

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