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Vapor-Phase-Infiltrated AlOx/PIM-1 “Hybrid Scaffolds” as Solution-Processable Amine Supports for CO2 Adsorption
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    Vapor-Phase-Infiltrated AlOx/PIM-1 “Hybrid Scaffolds” as Solution-Processable Amine Supports for CO2 Adsorption
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    ACS Applied Polymer Materials

    Cite this: ACS Appl. Polym. Mater. 2021, 3, 9, 4460–4469
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    https://doi.org/10.1021/acsapm.1c00452
    Published August 12, 2021
    Copyright © 2021 American Chemical Society

    Abstract

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    Energy-efficient adsorptive CO2 capture requires both adsorbent materials with high CO2 capacity and structured adsorption contactors possessing fast mass transfer kinetics and low pressure drop. The state-of-the-art research primarily focuses on “hard” adsorbents such as mesoporous zeolites and metal–organic frameworks, which exhibit high CO2 capacities but are challenging to translate into structured contactors. Polymer of intrinsic microporosity 1 (PIM-1), a solution-processable microporous polymer, is a “softer” alternative that can be easily fabricated into structured adsorption contactors. In prior research, PIM-1 has been utilized as a “molecular basket” for poly(ethylene imine) (PEI). Despite nanoscale amine dispersion and excellent processability, PEI/PIM-1 composites possess an unstable micropore structure, which collapses at high PEI loadings (∼30%) and results in lower CO2 adsorption capacity than PEI-loaded hard oxides. Here, we applied a post-fabrication polymer stabilization method, vapor phase infiltration (VPI), to improve the CO2 capacity of the PEI/PIM-1 composite without sacrificing its processibility. PIM-1 is fabricated into structured adsorption contactors and then reinforced with amorphous aluminum oxyhydroxide (AlOx) nanostrands via VPI. The resulting AlOx/PIM-1 is a stable, hierarchically porous support, which can be loaded with 40% PEI without pore collapse. Owing to the combination of processibility, comparable CO2 capacity, and high amine efficiency, PEI/AlOx/PIM-1 composites are a promising alternative to PEI-loaded mesoporous oxides.

    Copyright © 2021 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsapm.1c00452.

    • Supplementary characterization including thermogravimetric analysis, XPS, FTIR, porosimetry, CO2 sorption isotherm analysis, CO2 sorption kinetic analysis, heat of CO2 adsorption analysis, amine efficiency analysis, determination of the characteristic length of PEI domains, and detailed temperature-and-pressure swing CO2 adsorption (PDF)

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    Cited By

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    This article is cited by 5 publications.

    1. Cheng Ji, Zhongbo Zhang, Khalil D. Omotosho, Diana Berman, Byeongdu Lee, Ralu Divan, Supratik Guha, Elena V. Shevchenko. Porous but Mechanically Robust All-Inorganic Antireflective Coatings Synthesized using Polymers of Intrinsic Microporosity. ACS Nano 2022, 16 (9) , 14754-14764. https://doi.org/10.1021/acsnano.2c05592
    2. Khalil Omotosho, John Tran, Elena V. Shevchenko, Diana Berman. Polymer infiltration synthesis of inorganic nanoporous coatings: Does polymer template affect their properties?. Surface and Coatings Technology 2023, 452 , 129107. https://doi.org/10.1016/j.surfcoat.2022.129107
    3. Xinpu Niu, Guanying Dong, Dongyang Li, Yongsheng Zhang, Yatao Zhang. Atomic layer deposition modified PIM-1 membranes for improved CO2 separation: A comparative study on the microstructure-performance relationships. Journal of Membrane Science 2022, 664 , 121103. https://doi.org/10.1016/j.memsci.2022.121103
    4. Junye Wu, Xuancan Zhu, Fan Yang, Ruzhu Wang, Tianshu Ge. Shaping techniques of adsorbents and their applications in gas separation: a review. Journal of Materials Chemistry A 2022, 10 (43) , 22853-22895. https://doi.org/10.1039/D2TA04352A
    5. Xinyi Wan, Kuiyuan Zhang, Ting Wan, Youguo Yan, Zhizhen Ye, Xinsheng Peng. Graphene oxide constructed nano Newton's cradle for ultrafast and highly selective CO2 transport. Journal of Membrane Science 2022, 652 , 120475. https://doi.org/10.1016/j.memsci.2022.120475

    ACS Applied Polymer Materials

    Cite this: ACS Appl. Polym. Mater. 2021, 3, 9, 4460–4469
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsapm.1c00452
    Published August 12, 2021
    Copyright © 2021 American Chemical Society

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