Gas separation membrane and gas separation membrane module

Abstract

Provided is a gas separation membraneincluding a separation layerwhich comprises a block copolymer having at least a first segment and a second segment, in which the separation layerhas a phase separation structure that has at least a first structurederived from the first segment and a spherical second structurederived from the second segment. The gas separation membrane in which the spherical second structure satisfies Formula 1, the first structure and the spherical second structure satisfy the following Formula 2, and the first structurehas a structure that is continuous in the thickness direction over the entire thickness of the separation layerhas high gas permeability and high gas separation selectivity. Also provided is a gas separation membrane module.<0.4  Formula 1:<1  Formula 2: (R represents the average diameter of the spherical second structure, L represents the thickness of the separation layer, Ps represents the permeability coefficient of the first structure, and Pf represents the permeability coefficient of the spherical second structure. In this case, Ps and Pf represent the permeability coefficient of a gas with a higher permeability coefficient in the first structure, among two kinds of gases.)