▎ 摘　　要

NOVELTY - Palladium quantum dot doped graphene-based electric heating plate comprises insulating layer and graphene conductive film set on insulating layer. The graphite powder is provided, adopted modified Hummers method to prepare graphene oxide, and obtained graphene oxide acetone dispersion after centrifugation and acetone resuspension. The heteropoly acid is added to graphene oxide acetone dispersion, stirred and mixed. The first sediment is collected by centrifugation and dried. The first precipitate is resuspended in acetone. The palladium acetylacetonate is added, stirred and mixed, centrifuged to collect second sediment and dried. The second precipitate is placed in hydrogen environment for reduction to prepare palladium quantum dot doped graphene, and resuspended in ethanol to prepare dispersion of palladium quantum dot-doped graphene. The 50-250 pts. wt. first dispersant is taken and stirred. USE - Palladium quantum dot doped graphene-based electric heating plate. ADVANTAGE - The palladium quantum dot doped graphene-based electric heating plate has fast manufacturing process, convenient thickness control, functions of flexibility and resistance to tearing or breaking. DETAILED DESCRIPTION - Palladium quantum dot doped graphene-based electric heating plate comprises insulating layer and graphene conductive film set on insulating layer. The graphite powder is provided, adopted modified Hummers method to prepare graphene oxide, and obtained graphene oxide acetone dispersion after centrifugation and acetone resuspension. The heteropoly acid is added to graphene oxide acetone dispersion, stirred and mixed. The first sediment is collected by centrifugation and dried. The first precipitate is resuspended in acetone. The palladium acetylacetonate is added, stirred and mixed, centrifuged to collect second sediment and dried. The second precipitate is placed in hydrogen environment for reduction to prepare palladium quantum dot doped graphene, and resuspended in ethanol to prepare dispersion of palladium quantum dot-doped graphene. The 50-250 pts. wt. first dispersant is taken and stirred. The 15-40 pts. wt. palladium quantum dot-doped graphene dispersion and 5-25 pts. wt. conductive carbon black are slowly added to first dispersant to obtain palladium quantum dot-doped graphene-carbon black slurry. The 50-250 pts. wt. first dispersant is taken and stirred. The 5-20 pts. wt. peeling resin is slowly added to first dispersant to prepare resin slurry. The resin slurry and 50-200 pts. wt. second dispersant are added to stirred palladium quantum dot-doped graphene-carbon black slurry. The dripping is completed. The mixed liquid is transferred to autoclave at 70-100 degrees C for 0.5-2 hours, and naturally cooled. The stirring is continued during reaction process to prepare palladium quantum dot doped graphene-based mixed solution. The 0.5-2.5 pts. wt. structural stabilizer, 0.5-2.5 pts. wt. polyacrylonitrile-maleic anhydride copolymer and 5-10 pts. wt. leveling agent are added to palladium quantum dot doped graphene-based mixed solution, and stirred at 1000-5000 revolutions/minute for 0.5-6 hours to prepare palladium quantum dot-doped graphene-based conductive ink. The insulating base layer is provided. The palladium quantum dots doped graphene-based conductive ink is arranged on insulating layer by squeegee coating, spin coated, subjected to direct writing, screen printing, silk printing or inkjet printing, and cured to obtain palladium quantum dot doped graphene-based electric heating plate. The heteropoly acid comprises phosphomolybdic acid, silicomolybdic acid, phosphotungstic acid and silicotungstic acid. The degree of polymerization of polyacrylonitrile-maleic anhydride copolymer is 50-500. An INDEPENDENT CLAIM is included for an electric heating device, which comprises groove base, upper cover and palladium quantum dot doped graphene-based electric heating plate, upper cover is covered with groove base for enclosing accommodating cavity, and palladium quantum dot doped graphene-based electric heating plate is accommodated in accommodating cavity, pair of electrode rods are arranged in groove of groove base, and electrode holes corresponding to electrode rods are arranged on palladium quantum dot-doped graphene-based electric heating plate, electrode rod passes through electrode hole to fix palladium quantum dot-doped graphene-based electric heating plate, when installing palladium quantum dot-doped graphene-based electric heating plate, and electrode rod is electrically connected with palladium quantum dot doped graphene-based electric heating plate. DESCRIPTION OF DRAWING(S) - The drawing shows exploded view of palladium quantum dot doped graphene-based electric heating plate. Electric heatingdevice groove base (1) Upper cover (2) Heating plate (3) Electrode rod (11) Electrode hole (31)