Amidoxime Modified UiO-66@PIM-1 Mixed-Matrix Membranes to Enhance CO₂ Separation and Anti-Aging Performance.

ABSTRACT: Mixed matrix membranes (MMMs) generally have some fatal defects, such as poor compatibility between the two phases leading to non-selective pores. In this work, PIM-1 was chosen as the polymer matrix, and UiO-66 modified with amidoxime (UiO-66-AO) was used as the filler to prepare the MMMs. In the MMMs, the amino and hydroxyl groups on UO-66-AO form a rich hydrogen bond network with the N and O atoms in the polymer PIM-1 chain to improve the compatibility between the polymer matrix and the filler. In addition, the selective adsorption of CO₂ by the amidoxime group can promote the transport of CO₂ in the membrane, which enhances the gas selectivity. The CO₂ permeability and CO₂/N₂ selectivity of UiO-66-AO@PIM-1 MMMs are increased by 35.

SUBMITTER: Gao J 

PROVIDER: S-EPMC10536640 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature