A novel defect‐engineered MOF (quasi ZrFum or Q‐ZrFum) was synthesized via a controlled thermal deligandation process and incorporated into a CO2‐philic 6FDA‐durene polyimide (PI) matrix to form Q‐ZrFum loaded MMMs. Defect‐engineered MOFs and fabricated MMMs were investigated in terms of their characteristic properties and separation performance. The incorporation of defects into the MOF structure increases the pore size and provides unsaturated active metal sites that positively affect CO2 molecule transport. After the deligandation process, the interfacial compatibility between the Q‐ZrFum particles and the PI matrix increases, which improves the mechanical strength of Q‐ZrFum loaded membranes. MMM containing 5 wt.% of defect‐engineered Q‐ZrFum exhibits excellent CO2 permeability of 1308 Barrer which increased by 99% compared to the pure PI membrane (656 Barrer) at a feed pressure of 2 bar. Moreover, CO2/CH4 and CO2/N2 selectivity reached 44 and 26.6 which increased by about 70 and 16%, respectively. This study emphasizes that defect‐engineered MOFs can be promising candidates for use as filler in the preparation of MMMs for the future development of membrane‐based gas separation applications.

中文翻译：

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用于二氧化碳分离的缺陷工程金属有机骨架/聚酰亚胺混合基质膜

通过受控热脱配过程合成了一种新型缺陷工程 MOF（准 ZrFum 或 Q-ZrFum），并将其掺入亲 CO2 的 6FDA-杜烯聚酰亚胺（PI）基质中，形成负载 Q-ZrFum 的 MMM。研究了缺陷工程 MOF 和制造的 MMM 的特性和分离性能。将缺陷纳入 MOF 结构可增加孔径并提供不饱和活性金属位点，从而对 CO2 分子传输产生积极影响。脱配过程后，Q-ZrFum颗粒与PI基质之间的界面相容性增加，从而提高了Q-ZrFum负载膜的机械强度。含有 5 wt.% 缺陷工程 Q-ZrFum 的 MMM 表现出优异的 CO2 渗透性，为 1308 Barrer，在 2 bar 的进料压力下，与纯 PI 膜 (656 Barrer) 相比，增加了 99%。此外，CO2/CH4和CO2/N2选择性达到44和26.6，分别提高了约70%和16%。这项研究强调，缺陷工程 MOF 可以作为填充剂用于制备 MMM，以用于膜基气体分离应用的未来发展。