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‘Fish-Scale’ Mimicked Stretchable and Robust Oil-Wettability That Perform in Practically Relevant Various Physically/Chemically Severe Scenarios

Abstract

Stretchable biomimicked special wettability—particularly—‘lotus-leaf’ inspired superhydrophobicity is emerged as an important avenue for designing various smart and advanced materials. In this context, artificial fish-scale inspired—extreme oil-repellency that performs under water, is another important and highly relevant special wettability for its various prospective and relevant applications in practical scenarios. Highly water compatible hierarchical topography—that conferred the extreme oil-repellency underwater, is commonly synthesized using polymeric soft hydrogel and brittle metal oxide coatings that are generally delicate towards both the applied tensile stress and chemically harsh aqueous exposures. Thus, the designs of stretchable ‘fish-scale’ inspired artificial interfaces, are highly challenging, and examples of such stretchable interfaces are rare in the literature. Herein, a highly stretchable (150% strain) and physically/chemically durable underwater superoleophobic interface is introduced through simple and strategic integration of covalently cross-linked ‘reactive’ multilayers with the stretchable fibrous substrate. This synthesized bio-mimicking wettability remained unaltered in various harsh physical and chemical settings—including successive (1000 times) tensile deformations, different physical abrasions tests, prolonged exposure to (30 days) UV irradiation, exposures to high and low temperatures (100°C and 10°C) and severely complex aqueous phases. Thus, this current approach provided a durable and highly stretchable oil-repellent interface that would be relevant in various submarine-related and biomedical applications—including prevention of oil contamination, oil/water separations, anti-bio fouling coating on flexible medically relevant substrates (e.g.; catheter balloon) etc. Furthermore, the synthesized material was successfully extended to gravity driven and eco-friendly separation of oil/water mixtures under severe physical/chemical conditions (e.g. extremes of temperatures, tensile strain, pH, sea water, river water etc.)—and eventually provided a facile and robust avenue for various potent outdoor applications—of this biomimicked special wettability.

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Publication details

The article was received on 26 Feb 2018, accepted on 04 May 2018 and first published on 04 May 2018


Article type: Paper
DOI: 10.1039/C8TA01799A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    ‘Fish-Scale’ Mimicked Stretchable and Robust Oil-Wettability That Perform in Practically Relevant Various Physically/Chemically Severe Scenarios

    D. Parbat and U. Manna, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA01799A

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