Acid-Catalyzed Interfacial Polymerization of a Benzimidazole-Linked Polymer Membrane for Efficient H2/CO2 Separation

IF 5.1 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2025-03-14 DOI:10.1021/acs.macromol.4c02771

Jingjing Zhang, Chaoqun Niu, Ning Ren, Jiahang Du, Meixia Shan, Roberto Castro-Muñoz, Yatao Zhang

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引用次数: 0

Abstract

The development of cost-effective and energy-efficient membrane materials is of significant importance for the purification of hydrogen and the capture of carbon dioxide. Given the potential of benzimidazole-linked polymers (BILPs) for H₂/CO₂ separation, this study aimed to synthesize a novel BILP membrane material (BILP-x) through an acid-catalyzed interfacial polymerization strategy. The BILP-x membranes achieved an exceptional H₂ permeance of 176.6 GPU and a H₂/CO₂ selectivity of 12.3 at room temperature. Decreasing the BTA concentration can significantly increase the H₂ permeance to 987.6 GPU, while the H₂/CO₂ selectivity decreased to 8.0 at room temperature. In addition, the BILP-x membrane demonstrated exceptional long-term stability in H₂/CO₂ separation, maintaining its performance for up to 300 h under alternating temperatures of 373 and 423 K. Meanwhile, the molecular dynamics simulations verified that the addition of acid accelerated the diffusion rate of TP molecules in the interfacial polymerization reaction, resulting in the formation of denser membranes. The finding not only validates the promise of BILP-x membranes for H₂/CO₂ separation, but also opens up a new avenue for the development of high-performance membrane materials for a range of separation applications.

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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.