GAS SEPARATION MEMBRANE

摘要

A gas separation membrane is provided which has both excellent gas permeability and gas separation characteristics, particularly permeability of carbon dioxide (CO 2 ) and separation characteristics of carbon dioxide and methane (CH 4 ), at such a high level that has not hitherto been achieved. The gas separation membrane was obtained by heat treating a membrane composed of a hyperbranched polyimide-based material in a non-oxidizing atmosphere.