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. 2020 Nov 7;10(11):332. doi: 10.3390/membranes10110332

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Water flux recovery of single-skinned and double-skinned TFC membranes over a period of 480 min [189]. (b) Schematic of sandwich-like CNT-PES-CNT with cross-sectional SEM images of (i) CNT top layer and (ii) CNT back layer [31].