Abstract: The present invention provides a new separation functional layer suitable for separating an acid gas from a gas mixture containing the acid gas. The separation functional layer of the present invention includes: an ionic liquid; a polymer A that is hydrophilic and forms a crystal structure in the ionic liquid; and a polymer B different from the polymer A. A separation membrane of the present invention includes: the separation functional layer; and a porous support member supporting the separation functional layer.

Abstract: The present invention relates to a method for producing an ionic liquid-containing structure, including: an inorganic network structure forming step of forming a network structure of an inorganic compound in the presence of an ionic liquid; and a polymer network structure forming step of forming a polymer network structure of a prepolymer and a crosslinking agent in the presence of the ionic liquid.

Abstract: An object of the present invention is to provide a method which can produce an ionic liquid-containing network structure with high productivity. A method for producing an ionic liquid-containing structure, which includes an inorganic particle network structure forming step of forming a network structure by inorganic particles in the presence of an ionic liquid, and a polymer network structure forming step of forming a network structure by polymerization of a monomer component containing at least a polar group-containing monomer in the presence of the ionic liquid is provided.