Molecular-Scale Hybrid Membranes Derived from Metal-Organic Polyhedra for Gas Separation

by X. Liu, X. Wang, A. Bavykina, L. Chu, M. Shan, A. Sabetghadam, H. Miro, F. Kapteijn, J. Gascon
Year: 2018

Bibliography

X. Liu, X. Wang, A. Bavykina, L. Chu, M. Shan, A. Sabetghadam, H. Miro, F. Kapteijn, J. Gascon. ACS Appl. Mater. Interfaces 10 (2018) 21381–21389, Molecular-Scale Hybrid Membranes Derived from Metal-Organic Polyhedra for Gas Separation

Abstract

​The preparation and performance of mixed matrix membranes based on metal organic polyhedra (MOPs) are reported. MOP fillers can be dispersed as discrete molecular units (average 9 nm in diameter) when low filler cargos are used. In spite of the low doping amount (1.6 wt.%), a large performance enhancement in permeability, aging resistance and selectivity can be achieved. We rationalize this effect on the basis of the large surface to volume ratio of the filler, which leads to excellent dispersion at low concentrations and thus alters polymer packing. While membranes based only on the polymer component age quickly with time, the performance of the resulting MOP containing membranes meets the commercial target for post-combustion CO2 capture for more than 100 days.​

Keywords

Hybrid membrane Gas separation metal-organic polyhedron molecular-scale Cage