High Gas Permeability in Aged Superglassy Membranes with Nanosized UiO-66-NH₂ /cPIM-1 Network Fillers.

ABSTRACT: Superglassy membranes synthesised by polymers of intrinsic microporosity (PIMs) suffer from physical aging and show poor gas permeance over time, especially thin membranes, due to the fast rearrangement of nonequilibrium polymer chains. Herein, we constructed a novel PIM-1 thin film nanocomposite membrane (TFN) using nanosized UiO-66-NH₂ (≈10 nm)/carboxylated PIM-1 (cPIM-1) as the composite filler. Unlike conventional fillers, which interact with the polymer only via the surface, the UiO-66-NH₂ /cPIM-1 forms a stable three-dimensional (3D) network intertwining with the polymer chains, being very effective to impede chain relaxation, and thus physical aging. Nanosizing of UiO-66-NH₂ was achieved by regulating the nucleation kinetics using carbon quantum dots

SUBMITTER: Qiu B 

PROVIDER: S-EPMC10952568 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature