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Fluorine-free, liquid-repellent surfaces made from ionic liquid-infused nanostructured silicon.

ABSTRACT:

Abstract

Liquid-repellent surfaces based on slippery liquid-infused porous substrates (SLIPS) were prepared from porous, nanostructured silicon surfaces with different surface functionalization, infused with the polar ionic liquid 1-ethyl-3-methylimidazolium methylsulfate ([C₂mim]MeSO₄). Contrary to nonpolar SLIPS based on perfluorinated substrates and infusion liquids, [C₂mim]MeSO₄ forms stable SLIPS with high energy surfaces like native silicon (Si-SiO₂) or ionic liquid-functionalized silicon (Si-[C₃mim]Cl), whose liquid-repellent properties against low surface tension liquids (toluene, cyclohexane) were demonstrated by very low sliding angles (? < 3°) and low contact angle hysteresis (?? < 10°). These polar, ionic liquid-based SLIPS present a promising, environmentally benign extension of liquid-infused substrates to natural, high-energy oxide surfaces.

Graphical abstract

SUBMITTER: Bittner RW

PROVIDER: S-EPMC5225213 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Fluorine-free, liquid-repellent surfaces made from ionic liquid-infused nanostructured silicon.

Bittner Roland W RW Bica Katharina K Hoffmann Helmuth H

Monatshefte fur chemie 20161218 1

<h4>Abstract</h4>Liquid-repellent surfaces based on slippery liquid-infused porous substrates (SLIPS) were prepared from porous, nanostructured silicon surfaces with different surface functionalization, infused with the polar ionic liquid 1-ethyl-3-methylimidazolium methylsulfate ([C<sub>2</sub>mim]MeSO<sub>4</sub>). Contrary to nonpolar SLIPS based on perfluorinated substrates and infusion liquids, [C<sub>2</sub>mim]MeSO<sub>4</sub> forms stable SLIPS with high energy surfaces like native silic ...[more]

PMID: 28127102

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