Zeolite A/poly (1‐trimethylsilyl‐1‐propyne) (zeoliteA/PTMSP) and [emim][Ac]/chitosan (IL/CS) are mixed‐matrix membrane (MMM) materials with enhanced CO2/N2 permselectivity even at higher temperature. The scalability to asymmetric flat and hollow‐fiber geometry by a simple dip‐coating method was analyzed. The CO2/N2 separation performance was evaluated at different temperatures. The resulting composite membranes exhibit a significantly enhanced CO2 permeation flux because the MMM layer thickness is reduced by 97 % from flat to hollow‐fiber geometries in IL‐CS composite membranes, while the selectivity is maintained similar to the self‐standing membranes, thus proving that compatibility between the membrane component materials leads to a defect‐free composite membrane, regardless the geometry and temperature.
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