High-performance ester-crosslinked polymers of intrinsic microporosity membranes with enhanced CO2 selectivity and plasticization resistance

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-03-08 DOI:10.1016/j.seppur.2025.132447

Yijun Liu, Yongchao Sun, Fake Sun, Hongjin Li, Jianyu Guan, Lu Bai, Zeyuan Gao, Tianyou Li, Fangxu Fan, Gaohong He, Canghai Ma

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引用次数: 0

Abstract

Ester-crosslinking has proven to be an effective strategy for enhancing gas selectivity and CO₂-induced plasticization resistance. However, achieving ester-crosslinked membranes that surpass the 2019 CO₂/N₂ upper bound remains a significant challenge. To address this, we used polymer of intrinsic microporosity (PIM-1) as a precursor, followed by hydrolysis to prepare PIM-COOH. Subsequently, 1,4-butylene glycol was employed as a crosslinker to react with PIM-COOH, forming M-PIM, which is then thermally crosslinked at different conditions. The ester-crosslinked membrane treated at 250 °C for 8 h demonstrated a CO₂ permeability of 7184 Barrer, with a selectivity of 36.7 for CO₂/N₂ and 30.4 for CO₂/CH₄, both surpassing the 2019 upper bounds. Additionally, the ester-crosslinked membrane demonstrated resistance to CO₂-induced plasticization even at a test pressure of 35 bar. These results suggest that esterification and crosslinking modification significantly enhance both the gas separation performance and plasticization resistance of PIM-1 membranes. The approach presented in this work provides a promising pathway for designing high-performance membranes that exceed the 2019 CO₂ separation upper bounds and improve resistance to CO₂ plasticization, with potential applications in natural gas purification and CO₂ capture.

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具有固有微孔膜的高性能酯交联聚合物，可提高二氧化碳选择性和抗塑化性

酯交联已被证明是提高气体选择性和抗co2诱导塑化的有效策略。然而，实现超过2019年CO2/N2上限的酯交联膜仍然是一个重大挑战。为了解决这一问题，我们使用固有微孔聚合物（PIM-1）作为前驱体，然后水解制备PIM-COOH。随后，1,4-丁二醇作为交联剂与PIM-COOH反应生成M-PIM，然后在不同条件下进行热交联。经250 °C和8 h处理的酯交联膜的CO2渗透率为7184 Barrer，对CO2/N2和CO2/CH4的选择性分别为36.7和30.4，均超过了2019年的上限。此外，即使在35 bar的测试压力下，酯交联膜也表现出对二氧化碳诱导塑化的抗性。结果表明，酯化和交联改性均能显著提高PIM-1膜的气体分离性能和抗塑化性能。这项工作中提出的方法为设计高性能膜提供了一条有希望的途径，该膜超过了2019年二氧化碳分离上限，并提高了对二氧化碳塑化的抵抗力，在天然气净化和二氧化碳捕集方面具有潜在的应用前景。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.