▎ 摘　　要

NOVELTY - Preparing formaldehyde-eliminating coating at the bottom of radiator comprises e.g. (i) adding graphene nanosheet into N-methylpyrrolidone and ultrasonically dispersing, (ii) dispersing polyaniline in N-methylpyrrolidone, mixing graphene dispersion with polyaniline solution, filtering, dissolving filter cake in mixed solvent of deionized water and ethylene glycol, stirring and dispersing to obtain polyaniline modified graphene solution, (iii) adding palladium chloride solution into polyaniline-modified graphene solution, and drying under vacuum to obtain formaldehyde remover, (iv) wetting formaldehyde remover with ethanol in solution, and adding 60% polytetrafluoroethylene emulsion into container, adding ethanol into container containing formaldehyde remover and polytetrafluoroethylene solution, oscillating vibration within ultrasonic wave to obtain formaldehyde remover slurry, and (v) spraying formaldehyde remover slurry on the bottom of heating and drying at room temperature. USE - The method is useful for preparing formaldehyde-eliminating coating at the bottom of radiator. ADVANTAGE - The coating has large specific surface area and utilizes the heat of the radiator. DETAILED DESCRIPTION - Preparing formaldehyde-eliminating coating at the bottom of radiator comprises (i) adding graphene nanosheet having thickness of 1-20 nm into N-methylpyrrolidone and ultrasonically dispersing to obtain graphene dispersion having concentration of 0.5-2 mg/ml, (ii) uniformly dispersing polyaniline in N-methylpyrrolidone to obtain solution of 0.2-0.3 mg/ml polyaniline, mixing graphene dispersion with polyaniline solution at room temperature for 12-36 hours, filtering, dissolving filter cake in mixed solvent of deionized water and ethylene glycol, stirring and ultrasonically dispersing to obtain polyaniline modified graphene solution, where mass ratio between graphene and polyaniline is 1:0.01-0.025, (iii) reacting at 110-130 degrees C and stirring, adding molar concentration of 0.1 M palladium chloride solution into the polyaniline-modified graphene solution, and reacting for 3-5 hours, filtering, washing filter cake with deionized water and ethanol until the solution is free of ethylene glycol, and drying under vacuum to obtain formaldehyde remover, where mass ratio between palladium and total mass of graphene and polyaniline is 0.025:1, (iv) wetting formaldehyde remover with ethanol in the solution, and then adding 60% polytetrafluoroethylene emulsion into the container, where weight ratio between formaldehyde remover and polytetrafluoroethylene (dry weight) is 3:1, adding ethanol into container containing formaldehyde remover and polytetrafluoroethylene solution, oscillating vibration within ultrasonic wave to obtain formaldehyde remover slurry, and (v) spraying formaldehyde remover slurry on the bottom of the heating and drying at room temperature.