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[Display omitted] • PEBA2533/F127-Tpy-M mixed matrix membranes were prepared for CO 2 /H 2 separation. • F127-Tpy-M can enhance CO 2 separation performance and interfacial adhesion of MMMs. • The MMMs showed better CO 2 /H 2 separation performance than PEBA2533 membrane. Mixed-matrix membranes (MMMs) are an effective method for overcoming the trade-off limitations of conventional polymeric membranes and are attractive for CO 2 /H 2 separation. However, major challenges remain in achieving high gas separation performance and long-term stability owing to undesirable polymer/filler interfaces. In this study, a novel metallo-supramolecular polymer (F127-Tpy-M) was designed and selected to engineer a polymer/filler interface. Benefiting from strong intermolecular interactions, F127-Tpy-M dispersed well in the PEBA2533 matrix with a defect-free interface. By synergistically combining the dipole–quadrupole effect of the ethylene oxide groups in F127 and gas–metal interactions, MMMs could significantly improve the gas separation performance. In comparison with the pristine membrane, the MMM with 60% F127-Tpy-M loading exhibited 175–194% and 215–259% increases in CO 2 /H 2 selectivity and CO 2 permeability, respectively, which far surpass the 2008 Robeson upper bound. The molecular dynamics simulations supported the experimental data, confirming that F127-Tpy-M is a promising candidate for designing next-generation high-performance MMMs. [ABSTRACT FROM AUTHOR]

We report a smart polymer membrane whose pore can be switched between the “closed” and “open” state just by passing CO2 and Ar in solution respectively. Compared with other stimuli, such as pH or temperature change, gas is an environmentally friendly and cost-effective stimulus for reversibly tuning the pore size and imparting the size selectivity of the membrane. [ABSTRACT FROM AUTHOR]

Poly(ether-b-amide) (PEBA)/Tween20 gel membranes containing from 0 wt% to 65 wt% of Tween20 in PEBA2533, PEBA3533, and PEBA4033 were prepared by solvent casting method for CO2/N2separation. The gas separation properties of the polymeric gel membranes were tested for single gases of CO2and N2at 25°C with the feed pressure of 0.6 atm. For all pure PEBA membranes, CO2and N2permeability decreased as the amount of polyamide block increased, but CO2/N2selectivity increased. For PEBA/Tween20 gel membranes, both the CO2permeability and CO2/N2selectivity were greatly enhanced with the increase of Tween20 content. For the membrane of PEBA4033/Tween20-65, CO2/N2selectivity, and CO2permeability reached 54 and 146 Barrer, respectively, which is very interesting for potential application in CO2removal from flue gas. [ABSTRACT FROM PUBLISHER]