Stable, inexpensive and high–performance CO2 permeable membranes are of significant interest as materials for post–combustion CO2 capture. In this paper, we report that defect–free hydrogel membranes of thickness around 100 nm can be easily prepared by deposition of the hydrogel microparticles containing amines on the surface of porous support. The membranes showed CO2 selective permeability against N2.
