▎ 摘　　要

NOVELTY - The preparation of nano-titanium dioxide/graphene aerogel/resin-based composite material, involves taking anhydrous ethanol and dividing into anhydrous ethanol (I) and anhydrous ethanol (II), and mixing precursor of nano-titanium dioxide, anhydrous ethanol (I) and chelating agent to obtain solution (A), mixing absolute ethanol (II), deionized water and catalyst to obtain solution (B), dripping solution (B) to solution (A) to prepare nano-titanium dioxide precursor solution, immersing graphene aerogel in nano-titanium dioxide precursor solution, carrying out gel reaction, freeze-drying gel to obtain dry composite product, placing dry composite product in microwave generator under inert atmosphere, performing reduction treatment to prepare nano-titanium dioxide/graphene aerogel hybrid composite, and preparing composite material by filling resin solution into nano-titanium dioxide/graphene aerogel hybrid composite by vacuum-assisted impregnation to saturated state, and molding. USE - Preparation of nano-titanium dioxide/graphene aerogel/resin-based composite material. ADVANTAGE - The method enables preparation of nano-titanium dioxide/graphene aerogel/resin-based composite material by simple process ensuring strong operability, and since nano-titanium dioxide is generated inside aerogel, enhanced dispersibility is ensured, thereby solving common agglomeration problem of directly adding nanoparticles, and titanium dioxide forms interpenetrating network between graphene sheets during generation process, thereby ensuring enhanced synergistic effect and excellent electromagnetic shielding performance. DETAILED DESCRIPTION - The preparation of nano-titanium dioxide/graphene aerogel/resin-based composite material, involves (1) taking anhydrous ethanol and dividing into anhydrous ethanol (I) and anhydrous ethanol (II), and mixing precursor of nano-titanium dioxide, anhydrous ethanol (I) and chelating agent uniformly to obtain solution (A), mixing absolute ethanol (II), deionized water and catalyst uniformly to obtain solution (B), under stirring, dripping solution (B) to solution (A) to prepare nano-titanium dioxide precursor solution with pH of 2-3, where volume ratio of nano-titanium dioxide precursor, anhydrous ethanol (I) + (II), glacial acetic acid and deionized water is 1:(8-20):(0.5-2):(0.5-3), volume ratio of anhydrous ethanol (I) and anhydrous ethanol (II) is 2:1, and volume ratio of nano-titanium dioxide precursor solution and catalyst is 1:(0.05-0.10), (2) preparing nano-titanium dioxide/graphene aerogel hybrid composite by taking graphene aerogel, fully immersing in nano-titanium dioxide precursor solution, and placing in vacuum oven at room temperature for 1-5 minutes, taking out and leaving still for 1-2 hours, carrying out gel reaction in water bath at 30-60 degrees C for 7-9 hours, until gel is completely formed, where graphene aerogel composed of 10-30 mg/ml graphene oxide dispersion liquid is prepared by hydrothermal reduction or chemical reduction, and has three-dimensional graphene structure, and freeze-drying gel at -55--45 degrees C for 20-25 hours to obtain dry composite product, (3) placing dry composite product in microwave generator under inert atmosphere, and performing reduction treatment at 900-1500 W for 1-5 minutes to prepare nano-titanium dioxide/graphene aerogel hybrid composite, where mass ratio of titanium dioxide and graphene aerogel in hybrid composite is (0.7-1.8):1, (3) preparing composite material by filling resin solution into nano-titanium dioxide/graphene aerogel hybrid composite by vacuum-assisted impregnation to saturated state, and molding.