CO2 Separation by Imide/Imine Organic Cages

Two novel imide/imine-based organic cages have been prepared and studied as materials for the selective separation of CO2 from N-2 and CH4 under vacuum swing adsorption conditions. Gas adsorption on the new compounds showed selectivity for CO2 over N-2 and CH4. The cages were also tested as fillers in mixed-matrix membranes for gas separation. Dense and robust membranes were obtained by loading the cages in either Matrimid (R) or PEEK-WC polymers. Improved gas-transport properties and selectivity for CO2 were achieved compared to the neat polymer membranes.

Automated summary

Two novel imide/imine-based organic cages were prepared and studied as materials for selective separation of CO2 from N-2 and CH4. The cages showed selectivity for CO2 over N-2 and CH4 in gas adsorption and membrane filling, leading to improved gas transport properties and CO2 selectivity in mixed-matrix membranes.