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Issue 11, 2008
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A new application of ionic liquids: hydrophobic properties of tetraalkylammonium-based poly(ionic liquid)s

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Abstract

The potential of using poly(ionic liquid)s as a new family of hydrorepellent materials has been explored. Free-radical polymerization of a series of ionic liquids based on the polymerizable cation [2-(methacryloyloxy)ethyl]trimethylammonium and on the hydrophobic anions bis(trifluoromethylsulfonyl)imide, nonafluoro-1-butanesulfonate and dodecylbenzenesulfonate led to the corresponding poly(ionic liquid)s that were characterized by TGA and DSC analysis, SEM, MALDI-TOF and XPS spectroscopy. Contact angle investigations show that the nature of the surface of the poly(ionic liquid)s based on the nonafluoro-1-butanesulfonate and dodecylbenzenesulfonate anions are featured by remarkable hydrophobic properties with advancing contact angles (θadv) lying in the range 113–118°, while to the polymer poly[2-(methacryloyloxy)ethyl]trimethylammonium bis(trifluoromethylsulfonyl)imide is associated poor hydrorepellent activity (θadv = 76°). The tensiometric measurements also experience receding contact angles (θrec) lying in the range 16–20° and a consequent high hysteresis suggesting that, on the outermost layers of the polymers, very high and very low-energy surface portions are present.

Graphical abstract: A new application of ionic liquids: hydrophobic properties of tetraalkylammonium-based poly(ionic liquid)s

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Publication details

The article was received on 22 Jan 2008, accepted on 23 Jan 2008 and first published on 08 Feb 2008


Article type: Paper
DOI: 10.1039/B801227J
Citation: J. Mater. Chem., 2008,18, 1253-1260
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    A new application of ionic liquids: hydrophobic properties of tetraalkylammonium-based poly(ionic liquid)s

    P. Cardiano, P. G. Mineo, F. Neri, S. Lo Schiavo and P. Piraino, J. Mater. Chem., 2008, 18, 1253
    DOI: 10.1039/B801227J

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