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. 2023 Dec 14;14:8330. doi: 10.1038/s41467-023-44027-y

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — Photo images of a U20/PIM-1 and b pU20/PIM-1 membranes. Cross-sectional scanning electron microscopy (SEM) images of c, d U20/PIM-1 and e, f pU20/PIM-1 membranes. Red arrows indicate the significant agglomerates and interfacial voids in U20/PIM-1 mixed matrix membrane (MMM). g XRD spectra, h mechanical properties calculated from the nanoindentations tests (error bars represent standard deviations from 5 different analyses), and i N₂ sorption isotherms at 77 K (filled symbols: adsorption and unfilled symbols: desorption).