▎ 摘　　要

NOVELTY - A graphene material based carbon dioxide gas separating film preparing method involves adding graphene material to solvent, and dispersing in 0.1-3 mg/ml dispersion. Organic polymeric material is added to solvent to obtain 1-20 mass% solution. The solution is heated at 70-120 degrees C under stirring for 4-8 hours to obtain a polymer solution. The polymer solution is added to the dispersion at 70-120 degrees C for 10-16 hours under heating with stirring to prepare a coating solution. The coating solution is applied to a support member, naturally dried in air and heat cured to obtain the finished product. USE - Method for preparing a graphene material based carbon dioxide gas separating film. ADVANTAGE - The method enables preparing the separating film in a simple and economical manner with good carbon dioxide separation performance and wide application range, and is suitable for large-scale preparation. DETAILED DESCRIPTION - A graphene material based carbon dioxide gas separating film preparing method involves adding graphene material to solvent, and dispersing in 0.1-3 mg/ml dispersion. Organic polymeric material is added to solvent to obtain 1-20 mass% solution. The solution is heated at 70-120 degrees C under stirring for 4-8 hours to obtain a polymer solution. The polymer solution is added to the dispersion at 70-120 degrees C for 10-16 hours under heating with stirring, and a temperature of the solution is lowered to 40-60 degrees C to prepare a coating solution. The coating solution is applied to a support member, naturally dried in air and heat cured to obtain the finished product.