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. 2022 Feb 11;14(4):691. doi: 10.3390/polym14040691

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© 2022 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 (https://creativecommons.org/licenses/by/4.0/).

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SEM cross-sectional and surface micrographs of the dense (a) PPO, (b) PPO/GO (0.1%), (c) PPO/GO (0.3%), (d) PPO/GO (0.5%), (e) PPO/GO (0.7%), and (f) PPO/GO (0.9%) membranes.

SEM cross-sectional and surface micrographs of the dense (a) PPO, (b) PPO/GO (0.1%), (c) PPO/GO (0.3%), (d) PPO/GO (0.5%), (e) PPO/GO (0.7%), and (f) PPO/GO (0.9%) membranes.