用于CO2/CH4分离的cPIM-1/ZIF-8混合基质膜的制备

doi:10.16085/j.issn.1000-6613.2019-1917

化工进展 ›› 2020, Vol. 39 ›› Issue (9): 3518-3524.DOI: 10.16085/j.issn.1000-6613.2019-1917

• 专栏：材料科学与技术 • 上一篇下一篇

用于CO₂/CH₄分离的cPIM-1/ZIF-8混合基质膜的制备

陈丙晨(), 徐积斌, 万超, 董亮亮, 张春芳, 白云翔()

江南大学化学与材料工程学院，合成与生物胶体教育部重点实验室，江苏无锡214122

出版日期:2020-09-05 发布日期:2020-09-11
通讯作者: 白云翔
作者简介:陈丙晨（1994—），男，硕士研究生，主要从事膜材料制备及应用研究。E-mail：c17851308527@163.com 。
基金资助:
国家自然科学基金(21576114)

ZIF-8 filled carboxylated polymer of intrinsic microporosity membranes for CO₂/CH₄ separation

Bingchen CHEN(), Jibin XU, Chao WAN, Liangliang DONG, Chunfang ZHANG, Yunxiang BAI()

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China

Online:2020-09-05 Published:2020-09-11
Contact: Yunxiang BAI

摘要/Abstract

摘要：

自聚微孔聚合物（PIM-1）虽具有良好的CO₂渗透性能，但其气体选择性普遍较差，限制其在CO₂/CH₄分离领域的应用。本文以N,N-二甲基甲酰胺（DMF）为溶剂制备ZIF-8纳米粒子，将其引入到羧基化的PIM-1基质中，制备了cPIM-1/ZIF-8混合基质膜，用于CO₂/CH₄分离。结果表明：由于合成ZIF-8的溶剂也是cPIM-1的良溶剂，使得两者之间具有良好的界面相容性，从而使ZIF-8添加量高达质量分数45%。随着ZIF-8添加量的增加，膜的CO₂渗透速率持续增加，CO₂/CH₄选择性呈现先上升后下降的趋势。当ZIF-8添加量为质量分数25%时，膜的CO₂/CH₄分离性能最好，即CO₂渗透系数为3942 Barrer，CO₂/CH₄选择性为18.7，较cPIM-1纯膜分别提高了 84%和43%，成功地超越了Robeson分离上限。

关键词: 羧基化自聚微孔聚合物, 混合基质膜, 沸石咪唑酯骨架材料, 高添加量, CO₂/CH₄分离

Abstract:

Polymers of intrinsic microporousity (PIMs), especially PIM-1, is very promising membrane materials for CO₂ separation due to its high CO₂ permeability. However, low gas selectivity such as CO₂/CH₄ limits its further application in CO₂/CH₄ separation. In order to solve this problem, zeolitic imidazolate framework-8 (ZIF-8) synthesized in DMF was incorporated into carboxylated PIM-1 (cPIM-1) matrix to prepare cPIM-1/ZIF-8 mixed matrix membranes (MMMs). Compared with traditional PIM-1-based MMMs, cPIM-1 had good interfacial compatibility with ZIF-8 since it can be well dissolved in DMF, resulting in very high ZIF-8 content (45%) in cPIM-1/ZIF-8 MMMs. With increase of ZIF-8 content, the CO₂ permeability of the prepared MMMs monotonically increases, while the CO₂/CH₄ selectivity was ascend in first and descend at last. At the 25% of ZIF-8 content, the prepared MMMs exhibited the optimal CO₂/CH₄ separation performance that the CO₂ permeability and CO₂/CH₄ selectivity were 3942 Barrer and 18.7, respectively. Compared with pure cPIM-1 membrane, the CO₂ permeability and CO₂/CH₄ selectivity of cPIM-1/ZIF-8-25 were increased by 84% and 43%, respectively, which exceeded the Robeson upper limit.

Key words: carboxylated polymer of intrinsic microporosity, mixed matrix membranes, zeolite imidazole framework, high content, CO₂/CH₄ separation

中图分类号:

TB324

陈丙晨, 徐积斌, 万超, 董亮亮, 张春芳, 白云翔. 用于CO₂/CH₄分离的cPIM-1/ZIF-8混合基质膜的制备[J]. 化工进展, 2020, 39(9): 3518-3524.

Bingchen CHEN, Jibin XU, Chao WAN, Liangliang DONG, Chunfang ZHANG, Yunxiang BAI. ZIF-8 filled carboxylated polymer of intrinsic microporosity membranes for CO₂/CH₄ separation[J]. Chemical Industry and Engineering Progress, 2020, 39(9): 3518-3524.

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用于CO₂/CH₄分离的cPIM-1/ZIF-8混合基质膜的制备

ZIF-8 filled carboxylated polymer of intrinsic microporosity membranes for CO₂/CH₄ separation

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