Molecularly thin interface between polymers — for efficient CO2 capture membrane

Composite membranes for CO2 separation contain different functional layers in their structure (e.g. porous mechanical support, selective layer etc.). We found that when selective layer in composite membrane is made ultimately thin – it forms specific interface with supporting gutter polymer, and this structure shows unexpectedly high selectivity towards CO2 over nitrogen. This new finding provides the way to develop better membranes for CO2 capture.