▎ 摘　　要

NOVELTY - Preparation of flax-based carboxymethylcellulose and oxidized graphene composite film involves mixing carboxymethylcellulose solution and graphene suspension, ultrasonically dispersing for 10 minutes, magnetically stirring for 60 minutes, forming mixed solution, degassing resultant mixed solution in vacuum degassing machine under vacuum degree of 0.09 MPa, casting obtained mixture in culture dish, and drying at room temperature for 48 hours. USE - Preparation of flax-based carboxymethylcellulose and oxidized graphene composite film (claimed). ADVANTAGE - The method efficiently provides flax-based carboxymethylcellulose and oxidized graphene composite film having excellent adsorption performance. DETAILED DESCRIPTION - Preparation of flax-based carboxymethylcellulose and oxidized graphene composite film involves placing 0.2 g graphene oxide in ultrasonic cell crushing cup, adding 50 ml distilled water, ultrasonically crushing for 3 hours, forming 4 mg/ml oxidized graphene suspension, dissolving 2 g carboxymethyl cellulose in 100 ml distilled water, adding 1 ml glycerol, magnetically stirring in constant temperature water bath at 65 degrees C for 30 minutes, forming 2 %mass homogeneous stable carboxymethylcellulose solution, mixing obtained carboxymethylcellulose solution and graphene suspension in the ratio of 2:1, 4:1 or 8:1, ultrasonically dispersing for 10 minutes, magnetically stirring for 60 minutes, forming mixed solution, degassing resultant mixed solution in vacuum degassing machine under vacuum degree of 0.09 MPa, casting obtained mixture in culture dish, and drying at room temperature for 48 hours.