Mixed matrix membranes (MMMs) were synthesized from poly(amide-b-ethylene oxide) (Pebax) and mixed-ligand zeolitic imidazolate framework (ZIF-8–90(x)). The separation performance and microstructure of the membranes with different organic linker fractions and ZIF-8–90(x) loadings were characterized. Energy-dispersive X-ray microanalysis and field-emission scanning electron microscopy showed excellent adhesion between Pebax and ZIF-8–90(x), and no voids or clusters were observed. Single gas permeation measurements on MMMs revealed that the CO₂/N₂ selectivity of the membranes with ZIF-8–90(x) was better than that of the membrane with ZIF-8. Permeation analysis showed that the membranes with mixed ZIF-8 and ZIF-90 offers a tight microstructure. Overall, this study demonstrated that the gas separation behavior of the Pebax membrane was significantly changed by ZIF-8–90(x) loading. The ZIF-8–90(x)/Pebax membranes can be a good candidate for CO₂ capture applications.

中文翻译：

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配体的混合作用对沸石咪唑酸酯骨架/聚（酰胺-b-环氧乙烷）混合基质膜的二氧化碳捕获行为的影响

混合基质膜（MMM）由聚（酰胺-b-环氧乙烷）（Pebax）和混合配体的沸石咪唑酸酯骨架（ZIF-8-90（x））合成。表征了具有不同有机连接物级分和ZIF-8-90（x）负载量的膜的分离性能和微结构。能量色散X射线显微分析和场发射扫描电子显微镜显示Pebax和ZIF-8-90（x）之间具有出色的附着力，并且未观察到空隙或团簇。在MMM上进行的单一气体渗透测量表明，采用ZIF-8–90（x时，膜的CO ₂ / N ₂选择性）比使用ZIF-8的膜更好。渗透分析表明，混合了ZIF-8和ZIF-90的膜具有紧密的微观结构。总体而言，这项研究表明，ZIF-8–90（x）加载显着改变了Pebax膜的气体分离行为。ZIF-8–90（x）/ Pebax膜可以很好地用于CO ₂捕集应用。