Method for producing composition for forming gas separation membrane active layer, composition for forming gas separation membrane active layer produced by same, method for manufacturing gas separation membrane, and gas separation membrane

摘要

Provided is a method for producing a composition for forming a gas separation membrane active layer, the method including: obtaining a first reactant by allowing a cellulose-based compound and an acid substituted with fluorine to react; and adding dropwise an acid anhydride substituted with fluorine to the first reactant at a temperature higher than room temperature. Also provided is a composition for forming a gas separation membrane active layer.