混合基质膜原位合成TpPa COFs以增强CO2分离

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Industrial & Engineering Chemistry Research Pub Date : 2025-04-11 DOI:10.1021/acs.iecr.5c00266

Yueyangchao Yu, Yanting Tang, Longjie Liu, Qingnan Wang, Chongshan Yin, Keming Zhang, Chenlu Liu, Yi Ye, Xinglei Zhao, Tianhe Gu, Shaofei Wang

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引用次数: 0

摘要

共价有机框架（COFs）因其可调的孔隙率和结构坚固性，在二氧化碳选择性混合基质膜（MMMs）中显示出非凡的前景。为了减少 COF 在 MMM 中的聚集，我们提出了一种原位生长策略，将 COF 前体直接整合到聚合物基质中。通过优化反应条件，我们实现了 TpPa（由 1,3,5-三甲基氯葡萄糖醇和对苯二胺衍生而来）在 Pebax 基质中的均匀分散和成功原位形成。优化后的膜具有 313.4 巴的高二氧化碳渗透率（比纯 Pebax 高 45.8%）和 22.6 的二氧化碳/N2 选择性以及长期稳定性。正电子湮没寿命光谱进一步揭示了 COFs 的集成如何调节膜的自由体积特性。这项研究不仅解决了填料分散的难题，还为制造高性能、稳定的二氧化碳分离膜提供了一种可行的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

In Situ Synthesis of TpPa COFs in Mixed Matrix Membranes for Enhanced CO2 Separation

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In Situ Synthesis of TpPa COFs in Mixed Matrix Membranes for Enhanced CO2 Separation

Covalent organic frameworks (COFs) show exceptional promise for CO₂-selective mixed matrix membranes (MMMs) due to their tunable porosity and structural robustness. To mitigate COF aggregation in MMMs, we present an in situ growth strategy by directly integrating COF precursors into a polymer matrix. By optimizing reaction conditions, we achieve uniform dispersion and successful in situ formation of TpPa (derived from 1,3,5-triformylphloroglucinol and p-phenylenediamine) within the Pebax matrix. The optimized membrane exhibits a high CO₂ permeability of 313.4 Barrer (45.8% higher than pure Pebax) and CO₂/N₂ selectivity of 22.6, along with long-term stability. Positron annihilation lifetime spectroscopy further reveals how the integration of COFs modulates the membrane’s free-volume properties. This study not only addresses filler dispersion challenges but also provides a viable approach for fabricating high-performance, stable CO₂ separation membranes.

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来源期刊

Industrial & Engineering Chemistry Research 工程技术-工程：化工

CiteScore

7.40

自引率

7.10%

发文量

1467

审稿时长

2.8 months

期刊介绍： ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.