SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2024, Vol. 76 ›› Issue (12): 30-41.DOI: 10.1016/j.cjche.2024.06.031

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A covalently integrated ZIF-8/polyamide acid mixed matrix membrane with superior gas separation performance

Guozhen Li1,2, Shiqi Ling1,3, Yuhui Cui1, Shilong Dong1, Tianyin Liu2, Ting Li2, Siyu Pang1, Peiyong Qin1   

  1. 1. National Energy Research and Development Center for Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
    2. State Key Laboratory of Bio-Based Fiber Manufacturing Technology, China Textile Academy, Beijing 100025, China;
    3. Paris Curie Engineer School, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2024-01-10 Revised:2024-06-01 Accepted:2024-06-03 Online:2024-09-28 Published:2024-12-28
  • Contact: Peiyong Qin,E-mail:qinpeiyong@tsinghua.org.cn
  • Supported by:
    This work was funded by National Natural Science Foundation of China (22278023), Beijing Municipal Science and Technology Planning Project (Z221100002722002), Beijing Natural Science Foundation (2222015) and the long-term from the Ministry of Finance and the Ministry of Education of China.

A covalently integrated ZIF-8/polyamide acid mixed matrix membrane with superior gas separation performance

Guozhen Li1,2, Shiqi Ling1,3, Yuhui Cui1, Shilong Dong1, Tianyin Liu2, Ting Li2, Siyu Pang1, Peiyong Qin1   

  1. 1. National Energy Research and Development Center for Biorefinery, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
    2. State Key Laboratory of Bio-Based Fiber Manufacturing Technology, China Textile Academy, Beijing 100025, China;
    3. Paris Curie Engineer School, Beijing University of Chemical Technology, Beijing 100029, China
  • 通讯作者: Peiyong Qin,E-mail:qinpeiyong@tsinghua.org.cn
  • 基金资助:
    This work was funded by National Natural Science Foundation of China (22278023), Beijing Municipal Science and Technology Planning Project (Z221100002722002), Beijing Natural Science Foundation (2222015) and the long-term from the Ministry of Finance and the Ministry of Education of China.

Abstract: Zeolitic imidazolate framework-8 (ZIF-8) is a typical filler used to fabricate mixed matrix membranes (MMMs) on account of its attractive advantage of high selective permeability for gas separation. However, the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers, However, the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers, which will lead to a decrease of selectivity and the performance of gas separation will be strongly influenced. Herein, we modified ZIF-8 with 3-amino-1,2,4-triazole to obtain ZIF-8-NH2, Kapton polyamide acid was selected as the polymer matrix. Results showed that the ZIF-8-NH2/Kapton MMMs has a good compatibility interface between ZIF-8 and Kapton because of the covalent bridging, even the filler loading up to 45% (mass). The 45% (mass) of ZIF-8-NH2/Kapton membrane showed 297 barrer (1 barrer = 10-10 cm3·cm·cm-2·s-1·cmHg-1, 1 cmHg = 1333.22 Pa, standard temperature and pressure) of the permeability of H2 and 43.9 and 62.2 of selectivities for H2/N2 and for H2/CH4, respectively, which are beyond the upper limit of Robeson 2008.

Key words: Polyamide acid, ZIF-8, Mixed matrix membrane, Gas separation

摘要: Zeolitic imidazolate framework-8 (ZIF-8) is a typical filler used to fabricate mixed matrix membranes (MMMs) on account of its attractive advantage of high selective permeability for gas separation. However, the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers, However, the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers, which will lead to a decrease of selectivity and the performance of gas separation will be strongly influenced. Herein, we modified ZIF-8 with 3-amino-1,2,4-triazole to obtain ZIF-8-NH2, Kapton polyamide acid was selected as the polymer matrix. Results showed that the ZIF-8-NH2/Kapton MMMs has a good compatibility interface between ZIF-8 and Kapton because of the covalent bridging, even the filler loading up to 45% (mass). The 45% (mass) of ZIF-8-NH2/Kapton membrane showed 297 barrer (1 barrer = 10-10 cm3·cm·cm-2·s-1·cmHg-1, 1 cmHg = 1333.22 Pa, standard temperature and pressure) of the permeability of H2 and 43.9 and 62.2 of selectivities for H2/N2 and for H2/CH4, respectively, which are beyond the upper limit of Robeson 2008.

关键词: Polyamide acid, ZIF-8, Mixed matrix membrane, Gas separation