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Issue 7, 2016
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Environmentally-safe and transparent superhydrophobic coatings

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The bioinspired field of superhydrophobicity has almost universally deployed environmentally-detrimental approaches relying on organic solvents and fluorinated compounds to generate liquid-repellent surfaces, thus severely limiting application at industrial scales. Recent water-borne methods have reduced the use of volatile organic compounds, but these methods often rely on either fluorinated chemistries (to lower surface energy) or charge-stabilization (to suspend roughness-enhancing particle fillers). An entirely water-based and fluorine-free superhydrophobic formulation has been developed from hydrophilic titanium dioxide (TiO2) nanoparticles and polyolefin copolymers, without additional surfactants or charge-stabilization. The commercially-available ingredients are combined in a single-step, substrate-independent, wet-process application to deliver an ultra-simple, semitransparent coating which is attractive for large-area, fluid-barrier surface treatments. The coating constituents are environmentally-safe and FDA-approved, overcoming a nontrivial hurdle in the scalable development of sustainable fluid management technologies.

Graphical abstract: Environmentally-safe and transparent superhydrophobic coatings

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The article was received on 13 Nov 2015, accepted on 03 Dec 2015 and first published on 03 Dec 2015

Article type: Paper
DOI: 10.1039/C5GC02725J
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Green Chem., 2016,18, 2185-2192

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    Environmentally-safe and transparent superhydrophobic coatings

    J. E. Mates, R. Ibrahim, A. Vera, S. Guggenheim, J. Qin, D. Calewarts, D. E. Waldroup and C. M. Megaridis, Green Chem., 2016, 18, 2185
    DOI: 10.1039/C5GC02725J

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