High-Selectivity CO2 Mixture Separations by a Guanylated Polymer of Intrinsic Microporosity (PIM-G) Membrane

IF 5.1 1区化学 Q1 POLYMER SCIENCE Macromolecules Pub Date : 2024-10-28 DOI:10.1021/acs.macromol.4c01434

Samuel J. Kaser, Pablo Dean, Philippe Jean-Baptiste, Simar Kaur Mattewal, Taigyu Joo, Jing Ying Yeo, Zachary P. Smith

引用次数: 0

Abstract

Membrane technology has the potential to replace thermal methods for gas separation, resulting in significant energy savings. However, materials with better combinations of permeability and selectivity are needed to fulfill industrial requirements. In this work, we functionalize a polymer of intrinsic microporosity with a high CO₂ affinity guanidinium moiety to produce a highly CO₂-permselective ionic polymer (PIM-G). Permeability–selectivity performance is compared under pure- and mixed-gas conditions for CO₂/CH₄, CO₂/N₂, and CO₂/O₂ gas pairs. In addition, counteranion identities are modified along the halide series (F^–, Cl^–, Br^–, and I^–) to optimize separation performance, with larger halides found to improve the CO₂ permselectivity without a commensurate drop in the CO₂ permeability.

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利用官能团化聚合物固有微孔（PIM-G）膜实现高选择性二氧化碳混合物分离

膜技术有可能取代热法进行气体分离，从而大大节约能源。然而，要满足工业要求，需要将渗透性和选择性更好地结合在一起的材料。在这项研究中，我们用高二氧化碳亲和力的胍基对具有固有微孔的聚合物进行官能化，从而制备出一种高二氧化碳渗透选择性离子聚合物（PIM-G）。比较了 CO2/CH4、CO2/N2 和 CO2/O2 气体对在纯气和混合气体条件下的渗透选择性。此外，还对卤化物系列（F-、Cl-、Br- 和 I-）的反离子特性进行了修改，以优化分离性能，发现较大的卤化物可提高二氧化碳的渗透选择性，而二氧化碳的渗透性不会相应下降。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.