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. 2020 Feb 19;27(13):15488–15497. doi: 10.1007/s11356-020-08021-x

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© The Author(s) 2020

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Fig. 4 — a A water contact angle of the TNFS membrane (0°). b An underwater oil contact angle of the TNFS membrane (156 ± 1.6°). c Dynamic water contact angle: water droplet behavior when water drops on the TNFS membrane