▎ 摘　　要

NOVELTY - Cellulose-graphene porous composite aerogel comprises 80-100 pts. wt. cellulose, 0.5-1.5 pts. wt. graphene oxide with a particle size distribution range of 5-20 nm and 2-5 pts. wt. reduced graphene with a particle size distribution range of 100-500 nm. At least part of the cellulose and at least part of the graphene oxide are embedded between adjacent sheet structures of the reduced graphene to form a sandwich structure. USE - Cellulose-graphene porous composite aerogel used to apply in functional materials. Can also be used in electric conduction, adsorption, reinforcement and the like. ADVANTAGE - Subjecting the graphene oxide to spray drying treatment, in the spray drying process, moisture evaporation caused by the mechanical action force of spraying and the instantaneous temperature is received, wrinkling graphene lamellar structure to a certain degree, so that the specific surface area of the graphene oxide is improved, and meanwhile, as the surface becomes wrinkled and rough, the fibrous structure of cellulose is more easily intertwined on the surface, so that physical winding is formed, and the mechanical property of an aerogel product is further improved. Introduction of glycerol and glycol adjusting the evaporation rate of water molecules in the spray drying process, so that the wrinkle degree of the graphene oxide is adjusted, and agglomeration caused by overlarge interaction force of small-particle graphene after the specific surface area of the small-particle graphene is excessively increased is avoided. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of cellulose-graphene porous composite aerogel involves dissolving cellulose in ionic liquid to obtain an ionic liquid solution of cellulose. Adding graphene oxide and reduced graphene to the cellulose ionic liquid solution, and after ultrasonic dispersion is uniform, dialyzing with deionized water to remove the ionic liquid to obtain a composite hydrogel. Freeze-drying the composite hydrogel to obtain the product.