The preparation and the 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. Although membranes based only on the polymer component age quickly with time, the performance of the resulting MOP-containing membranes meets the commercial target for postcombustion CO2 capture for more than 100 days.

Original languageEnglish
Pages (from-to)21381-21389
Number of pages9
JournalACS Applied Materials and Interfaces
Issue number25
Publication statusPublished - 27 Jun 2018

    Research areas

  • cage, gas separation, hybrid membrane, metal-organic polyhedron, molecular scale

ID: 45665195