Our group proposed a novel flexible soft-solid metal-organic framework composite membrane architecture. The quasi-vertically oriented, solid Zn2(benzimidazolate)4 particles grown on the commercial polyvinylidene fluoride (PVDF) substrates provided predominant molecular sieving gas entrances, while the soft polyamide eliminated defects enclosing MOF particles, resulting in a superior H2/CO2 separation factor which far exceeded those of MOF-based membranes reported to date. The result, which demonstrates the intrinsic molecular sieving capability of MOFs, will promote the development of MOF-based membranes in practical separation applications.

The article links:https://onlinelibrary.wiley.com/doi/full/10.1002/anie.202117577