▎ 摘　　要

NOVELTY - Grading graphene oxide based on reversible adsorption polymer comprises (i) adding graphene oxide to absolute ethanol for ultrasonic cleaning for 10-20 minutes, taking out and drying to obtain a clean graphene oxide solid; (ii) adding graphene oxide to distilled water and mixing uniformly to obtain a graphene oxide suspension; (iii) adding poly-N-isopropyl acrylamide to the graphene oxide suspension and stirring at a constant temperature until completely dissolved to obtain a mixed suspension; (iv) heating the mixed suspension at a constant temperature and carrying out hot gradient centrifugation to obtain a precipitate; and (v) filtering at room temperature and washing. USE - The method is useful for grading graphene oxide based on reversible adsorption polymer. ADVANTAGE - The method has high production efficiency; and is economical and environmentally-friendly.