▎ 摘　　要

NOVELTY - Preparing three-dimensional carbon foam/graphene oxide-based complex material by centrifugal separation comprises washing the melamine-formaldehyde resin foam with distilled water and ethanol, immersing in anhydrous ethanol for ultrasonic treatment, washing, drying, heating, carrying out thermal cracking, cooling the furnace and obtaining a conductive three-dimensional carbon foam skeleton, (ii) obtaining the carbon foam adsorbed with graphene oxide or graphene oxide-based complex material, (iii) placing the separator having a mesh structure in a centrifuge tube or a centrifuge bottle, taking out the carbon foam adsorbed with graphene oxide or graphene oxide-based complex material, placing on the separator of the centrifuge tube or the centrifuge bottle, placing the centrifuge tube or centrifuge bottle in the centrifuge, stating the centrifuge to perform solid-liquid separation through a separator under centrifugal action, and (iv) drying the solid phase to remove moisture. USE - The method is useful for preparing three-dimensional carbon foam/graphene oxide-based complex material by centrifugal separation. ADVANTAGE - The method is simple. The product has good flexibility and conductivity. DETAILED DESCRIPTION - Preparing three-dimensional carbon foam/graphene oxide-based complex material by centrifugal separation comprises washing the melamine-formaldehyde resin foam with distilled water and ethanol respectively, immersing in anhydrous ethanol for ultrasonic treatment, washing away impurities, drying or air drying to remove anhydrous ethanol, heating to 800-1000 degrees C at a heating rate of 5-10 degrees C/minute in an inert atmosphere, carrying out thermal cracking for 2-5 hours, cooling the furnace to normal temperature and obtaining a conductive three-dimensional carbon foam skeleton, (ii) immersing the three-dimensional carbon foam skeleton in a graphene oxide dispersion or a graphene oxide alkenyl complex dispersion, immersing for 3-20 minutes and obtaining the carbon foam adsorbed with graphene oxide or graphene oxide-based complex material by repeatedly extruding a three-dimensional carbon foam skeleton to ensure saturation adsorption, where the concentration of the graphene oxide dispersion is 0.5-6 mg/ml and the concentration of the graphene oxide-based complex dispersion is 0.5-6 mg/ml, (iii) placing the separator having a mesh structure in a centrifuge tube or a centrifuge bottle, taking out the carbon foam adsorbed with graphene oxide or graphene oxide-based complex material, placing on the separator of the centrifuge tube or the centrifuge bottle, placing the centrifuge tube or centrifuge bottle in the centrifuge, stating the centrifuge to perform solid-liquid separation through a separator under centrifugal action, where the liquid phase is a separated graphene oxide dispersion or a graphene oxide-based complex dispersion and the solid phase is a three-dimensional carbon foam skeleton encapsulating the graphene oxide nanosheet or the graphite oxide alkenyl complex nanosheet and (iv) drying the solid phase to remove moisture to obtain a three-dimensional carbon foam/graphite oxide-based complex material.