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.
Bibliographical noteFunding Information:
*E-mail: firstname.lastname@example.org (X.L.). *E-mail: email@example.com (J.G.). ORCID Xinlei Liu: 0000-0001-7552-1597 Xuerui Wang: 0000-0003-2220-7531 Liangyong Chu: 0000-0001-7496-4775 Freek Kapteijn: 0000-0003-0575-7953 Jorge Gascon: 0000-0001-7558-7123 Funding The authors appreciate the financial support from the European Research Council under the European Union’s Seventh Framework Programme (FP/2007-2013), M4CO2 project (608490). Notes The authors declare no competing financial interest.
© 2018 American Chemical Society.
- gas separation
- hybrid membrane
- metal-organic polyhedron
- molecular scale
ASJC Scopus subject areas
- Materials Science(all)