IN SITU FABRICATION OF METAL-ORGANIC FRAMEWORK FILMS AND MIXED-MATRIX MEMBRANES

摘要

Provided herein are methods for fabricating a mixed-matrix membrane in situ and for increasing formation of zeolitic imidazolate framework nanoparticles inside the mixed-matrix membrane. Generally, in the method a polyimide polymer on a support is hydrolzed with a base and the poly(amic acid)-salt film formed thereby undergoes ion exchange with a metal ion, treatment of the formed poly(amic acid)-metal salt film with an organic linker to produce metal-organic framework nanoparticles in situ, and imidization of the treated poly(amic acid)-metal salt film to produce a polyimide/metal-organic framework mixed-matrix membrane. Also provided is the mixed-matrix membrane fabricated by the method and a method for separating a binary gas mixture via the fabricated mixed-matrix membrane.