▎ 摘　　要

NOVELTY - Preparing modified graphene comprises taking e.g. crystalline flake, graphite powder and boric acid solution in a stainless steel high-pressure bottle, sealing, slowly removing air, filling with liquid gas, shaking, connecting to a solid-state gas preparation machine to prepare a solid-state gas, performing ultraviolet high-energy radiation, peeling graphene sheet, modifying the graphene sheets and the solid gas to form carbonyl and carbohydroxy groups, generating under high-energy radiation, continuously grafting with the silicon hydroxy group to obtain modified graphite product and exposing under an ultraviolet lamp, removing organic substances, completing the functional modification of the carbonyl and carbon hydroxy groups , forming silicon hydroxy groups by hydrolyzing of modifier under high energy radiation undergoing grafting reaction to obtain modified graphene product and storing in a vacuum as an intermediate for preparing a modified graphene-containing slurry. USE - The method is useful for preparing modified graphene. ADVANTAGE - The modified graphene slurry has excellent dispersibility, surface functionalization characteristics and bonded with nano titanium and silicon to form a titanium-silicon-modified graphene ternary composite material. The method is highly efficient and environmentally friendly. DETAILED DESCRIPTION - Preparing modified graphene comprises (a) taking crystalline flake graphite powder, silane coupling agent, distilled water and boric acid solution (1-2 mol /l) in a stainless steel high-pressure bottle, sealing, slowly removing the air from the stainless steel high-pressure bottle having a vacuum degree -0.09-0.1MPA, (b) filling the stainless steel high-pressure bottle obtained in step (a) with liquid gas, shaking, allowing to stand for 20-28 hours, (c) connecting the stainless steel high-pressure bottle obtained in step (b)to a solid-state gas preparation machine to prepare a solid-state gas, (d) performing ultraviolet high-energy radiation by placing the solid gas obtained in step (c) in an ultraviolet cleaning machine in 185nm and 254nm bands, peeling the graphene sheet by generating microbursts, functionally modifying the graphene sheets and the solid gas to form carbonyl and carbohydroxy groups, generating the carbonyl and carbon hydroxy groups on the surface of the graphene sheet under high-energy radiation, continuously grafting with the silicon hydroxy group formed by the hydrolysis of the silicon hydroxy compound or the modifier to obtain the modified graphite product and (e) continuously exposing the crude modified graphene product obtained in step (d) under an ultraviolet lamp for 20-60 minutes, removing organic substances on the surface of the modified graphene product, completing the functional modification of the carbonyl and carbon hydroxy groups formed on the surface of the modified graphene crude product obtained in step (d), forming silicon hydroxy groups by hydrolyzing of modifier under high energy radiation undergoing grafting reaction to obtain modified graphene product and storing in a vacuum as an intermediate for preparing a modified graphene-containing slurry.