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Building interfacial compatible Por-POF/PIM-1 mixed-matrixmembranes for efficient CO2/N2 separation

Authors： WANG Xiaonan, NI Fei, LI Haizhuang, SHEN Shuxin, SUN Tengteng, WANG Kangjun, YU Guangli

Units： School of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China

KeyWords： mixed matrix membranes; Por-POF; interfacial compatibility; CO2 separation

ClassificationCode：TQ050.4+3

year,volume(issue):pagination： 2024,44(4):170-177

Abstract：

Mixed matrix membranes (MMMs) have great potential to achieve excellent CO2 separation, while their performances are often limited by poor interfacial compatibility between fillers and matrix. Here, a rational design and facile construction of highly permeable MMMs is presented by dispersing porphyrin based porous organic framework (Por-POF) within solution-processable polymer of intrinsic microporosity (PIM-1). The pure organic nature of Por-POF enhances its interaction with the pure organic polymer matrixes, leading to good interfacial compatibility in the resultant MMMs. Porous Por-POF fillers can increase the membrane fractional free volume that enhances the membrane gas permeability. Besides, Por-POF exhibits enriched nitrogen in its pore walls that has a strong adsorption effect on CO2, thus achieving higher CO2/N2 selectivity. Gas permeations demonstrate that CO2 permeability and CO2/N2 selectivity for Por-POF/PIM-1 increased by 157% and 64%, respectively, compared with pure PIM-1. This study will further bring unique insights for the rational design and construction of high performances separation membranes.

Funds：

大学生创新创业训练项目（202210149011）；辽宁省博士启动基金项目（2022-BS-213）；国家自然科学基金项目（22208224）

AuthorIntro：

王晓楠（2002-），女，辽宁大连人，本科生，主要研究方向为二氧化碳分离膜材料制备，E-mail：aurora_xiaonanwang@163.com

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