Polymer-assisted monolithic MOFs formation towards membrane gas separation

Metal-organic frameworks (MOFs) are renowned for their tunable pore sizes and porosity, structural versatility, and diverse application potential. However, achieving self-supported monolithic MOFs with good crystallinity remains a significant challenge for membrane gas separation, which limits their practical applications particularly. In this study, self-supported MOFs m /polymer membranes were prepared using polymer-assisted monolithic MOFs (MOFs m ), i.e., three types of self-supported MOFs m /polymer membranes-UiO-66 m /PDMS, UiO-67 m /PDMS and UiO-66-NH 2 m /PDMS were successfully prepared. A series of characterizations has demonstrated that each self-supported MOFs m /polymer membrane exhibited good crystallinity, eliminated non-selectivity defects and achieved efficient CO 2 /N 2 separation. In addition, the self-supported MOFs m /polymer membranes still exhibit excellent gas separation performance even under high pressure conditions. This study provides a feasible new strategy for realizing monolithic MOFs in the field of membrane gas separation.