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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. 7 — a Photo images of as-prepared pU20/PIM-1 thin-film nanocomposite (TFN) membranes depending on membrane area. Cross-sectional SEM images of b PIM-1 thin-film composite (TFC) membrane (3 × 3 cm²) and c pU20/PIM-1 TFN membranes (20 × 20 cm²) (scale bar = 2 µm). d CO₂/N₂ separation performance of TFC and TFN membranes depending on membrane area tests (error bars represent standard deviations from 4 different samples). e Comparison of CO₂/N₂ separation performances of TFC and TFN membranes prepared in this study with literature data⁷⁰. The yellow square denotes the desired performance for the membrane-based post-combustion CO₂ capture².