▎ 摘　　要

NOVELTY - Gas permeable membrane element (100) comprises: porous support (120); and composite (110) coated on the porous support, where the composite comprises a diamine-functionalized graphene oxide material and a polyether block amide, and the diamine-functionalized graphene oxide material is distributed within the polyether block amide where the gas permeable membrane element is selectively permeable to carbon dioxide gas. USE - The gas permeable membrane element is useful for separating carbon dioxide from other gas streams. ADVANTAGE - The membrane: selectively allows certain gas species to pass through while retaining the remaining gas species and separation is eco-friendly and cost effective; and has high mechanical strength and nanometer scale thickness. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) gas separation device comprising the gas permeable membrane element in fluid communication with first plenum containing a first gas, and second plenum containing a second gas, where the gas permeable membrane element selectively allows carbon dioxide gas to pass from the first plenum to the second plenum; and (2) making a gas permeable element comprising curing an aqueous mixture that is coated onto a porous support, where the aqueous mixture that is coated onto the porous support is cured at room temperature until dry and the porous support is coated with the aqueous mixture by applying the aqueous mixture to the porous support, and repeating as necessary to achieve a layer having a thickness of about 0.1-10 mu m and the aqueous mixture is formed by mixing a diamine-functionalized graphene oxide material and a polyether block amide in an aqueous liquid. DESCRIPTION OF DRAWING(S) - The figure illustrates schematic view of element with protective coating. Gas permeable element (100) Composite (110) Porous support (120) Protective coating (140)