Functionalized polyimides and membranes for gas separations

摘要

A functionalized polyimide prepared by brominating an aromatic polyimide and reacting the resulting brominated polyimide with a cyclic imide salt, a gas separation membrane comprising the functionalized polyimide of the invention, a gas separation device comprising the gas separation membrane of the invention and a method for separating a gas mixture. The gas separation membrane prepared from the functionalized polyimide can provide both better selectivity and better permeability for separating a gas mixture composition.