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Issue 25, 2019
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Under-liquid dual superlyophobic nanofibrous polymer membranes achieved by coating thin-film composites: a design principle

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Abstract

Surfaces with under-liquid dual superlyophobicity have garnered tremendous interest because of their promising applications, but their unexplored underlying nature restricts the designed construction of such surfaces. Herein, we coated the thin-film composites with different terminal groups over the electrospun polyacrylonitrile nanofibrous membranes, which afforded the membranes excellent stability in organic solvents, as well as modulated under-liquid wetting behaviors. Among them, the representative under-liquid dual superlyophobic 4-cyan-Ph-terminated membrane could realize highly efficient separation of all types of oil/water mixtures and even emulsions. Moreover, we found that the under-liquid wetting behaviors could be classified in terms of the intrinsic water contact angle (θw). By comparing the total interfacial energy, we proved that the under-liquid dual lyophobic surfaces were thermodynamically metastable. On this basis, we could predict the θw of rough surfaces with the under-liquid dual lyophobicity in a given oil–water–solid system (e.g., 47.3–89.1° in cyclohexane–water–solid system, R = 2). This work provides a design principle for the fabrication of under-liquid dual superlyophobic surfaces, which will open potential applications in diverse fields in terms of such smart surfaces.

Graphical abstract: Under-liquid dual superlyophobic nanofibrous polymer membranes achieved by coating thin-film composites: a design principle

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Supplementary files

Article information


Submitted
02 Apr 2019
Accepted
20 May 2019
First published
20 May 2019

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2019,10, 6382-6389
Article type
Edge Article

Under-liquid dual superlyophobic nanofibrous polymer membranes achieved by coating thin-film composites: a design principle

Q. Wang, Y. Wang, B. Wang, Z. Liang, J. Di and J. Yu, Chem. Sci., 2019, 10, 6382
DOI: 10.1039/C9SC01607D

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