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pH-Responsive smart non-woven fabrics (NWFs) with double switchable wettability between superhydrophilicity–superhydrophobicity–superhydrophilicity to oil/water separation

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Abstract

pH-Responsive smart non-woven fabrics (NWFs) with double transformations were prepared via the in situ grafting of Ag nanoparticles through an oxidation–reduction reaction and were modified using a mixed thiol-molecule solution, including HS(CH2)10CH3, HS(CH2)10COOH and HS(CH2)11OH. A NWF continuously separates immiscible oil–water mixtures with high selectivity and has considerable flux under gravity. The wettability of NWFs with an optimal thiol concentration shows reversible switches between superhydrophilicity–superhydrophobicity–superhydrophilicity, which corresponds to different conditions such as acidic, neutral and basic. The as-prepared NWFs had great oil absorption capacities and possessed high oil–water separation efficiency. This simple approach to fabricate pH-responsive NWFs has provided a facile and versatile strategy for effectively separating oil–water mixtures, which can be further applied for water treatment, purification of solvents or fuels and so on.

Graphical abstract: pH-Responsive smart non-woven fabrics (NWFs) with double switchable wettability between superhydrophilicity–superhydrophobicity–superhydrophilicity to oil/water separation

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Publication details

The article was received on 24 Jan 2019, accepted on 26 Mar 2019 and first published on 27 Mar 2019


Article type: Paper
DOI: 10.1039/C9NJ00409B
Citation: New J. Chem., 2019, Advance Article

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    pH-Responsive smart non-woven fabrics (NWFs) with double switchable wettability between superhydrophilicity–superhydrophobicity–superhydrophilicity to oil/water separation

    Z. Zhang, H. Yu, J. Guo, Z. Bai, S. Zhang, Y. Zhang and J. Wang, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ00409B

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