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基于聚醚酰亚胺、金属有机框架和离子液体的混合基质膜：组成和形态对气体传输性能的影响

Mixed-Matrix Membranes Based on Polyetherimide, Metal-Organic Framework and Ionic Liquid: Influence of the Composition and Morphology on Gas Transport Properties.

作者信息

Zid Sarra, Alcouffe Pierre, Zinet Matthieu, Espuche Eliane

机构信息

Univ Lyon, CNRS, UMR 5223, Ingénierie des Matériaux Polymères, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, CEDEX, 69622 Villeurbanne, France.

出版信息

Polymers (Basel). 2022 Aug 25;14(17):3489. doi: 10.3390/polym14173489.

DOI:10.3390/polym14173489
PMID:36080562
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9460398/
Abstract

In this work, membranes based on polyetherimide (PEI), a ZIF-8 metal-organic framework and 1-ethyl-methylimidazolium tetrafluoroborate ionic liquid (IL) were prepared. IL and ZIF-8 contents amounting to 7 wt% and 25 wt%, respectively, were investigated. CO, He and H transport properties of PEI/IL/ZIF-8 membranes were compared to those obtained for the respective PEI/ZIF-8 and PEI/IL systems. Membranes' gas permeability and selectivity are discussed as a function of the membrane composition and morphology, and they were assessed in relation to existing experimental and theoretical data from the literature. Promising gas transport properties were obtained using the appropriate combination of ZIF-8 and IL amounts in the PEI matrix. Indeed, an increase in the CO permeability coefficient by a factor of around 7.5 and the He and H permeability coefficients by a factor of around 4 was achieved by adding 7 wt% IL and 10 wt% ZIF-8 to the PEI matrix. Moreover, diffusion was evidenced as a governing factor in the studied membrane series.

摘要

在这项工作中，制备了基于聚醚酰亚胺（PEI）、ZIF-8金属有机框架和1-乙基-甲基咪唑四氟硼酸盐离子液体（IL）的膜。研究了IL和ZIF-8的含量分别为7 wt%和25 wt%的情况。将PEI/IL/ZIF-8膜的CO、He和H传输性能与相应的PEI/ZIF-8和PEI/IL体系的传输性能进行了比较。讨论了膜的气体渗透性和选择性与膜组成和形态的函数关系，并根据文献中现有的实验和理论数据对其进行了评估。通过在PEI基体中适当组合ZIF-8和IL的量，获得了良好的气体传输性能。实际上，通过向PEI基体中添加7 wt%的IL和10 wt%的ZIF-8，CO渗透系数提高了约7.5倍，He和H渗透系数提高了约4倍。此外，扩散被证明是所研究的膜系列中的一个主导因素。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/18594d09e195/polymers-14-03489-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/18594d09e195/polymers-14-03489-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/113f9b751306/polymers-14-03489-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/3a0f0cbb8338/polymers-14-03489-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/371df59a839c/polymers-14-03489-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/2e0b0fe509a8/polymers-14-03489-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/5fc75d3c51b5/polymers-14-03489-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/56a3540b1ef2/polymers-14-03489-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/8051b52b5aeb/polymers-14-03489-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/767b8b3263a7/polymers-14-03489-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a473/9460398/18594d09e195/polymers-14-03489-g013.jpg

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