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Issue 7, 2014
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Superhydrophobic conducting polymers with switchable water and oil repellency by voltage and ion exchange

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Abstract

In order to elaborate superhydrophobic polymers with switchable water and oil-repellency, copolymers are prepared by electrodeposition. A fluorinated monomer (EDOT-F8) is used to reach superhydrophobic properties and a monomer containing an ammonium function (EDOT-N+) to induce changes in the surface wettability by ion exchange. We also study the change in the surface wettability by dedoping at a different voltage. Surprisingly, an increase in the water and oil repellency was observed by introduction of hydrophilic monomers (EDOT-N+), which is due to a modification in the surface morphology and more precisely to the presence of small spherical particles containing thin fibrils on their surface (multi-scale roughness). The dedoping and the ion exchange (ClO4 by BF4, Tf2N or C8F17SO3) especially modify the oil-repellency. Here, the highest oleophobic properties are obtained with the inorganic ions (ClO4 and BF4).

Graphical abstract: Superhydrophobic conducting polymers with switchable water and oil repellency by voltage and ion exchange

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Supplementary files

Article information


Submitted
09 Sep 2013
Accepted
25 Nov 2013
First published
27 Nov 2013

RSC Adv., 2014,4, 3550-3555
Article type
Paper

Superhydrophobic conducting polymers with switchable water and oil repellency by voltage and ion exchange

S. Taleb, T. Darmanin and F. Guittard, RSC Adv., 2014, 4, 3550
DOI: 10.1039/C3RA44960B

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