▎ 摘　　要

NOVELTY - Preparing thermally conductive porous graphene-epoxy composite material comprises e.g. (i) preparing porous graphene oxide by (i.a) grinding graphite chips, placing in concentrated sulfuric acid, adding hydrogen peroxide to the concentrated sulfuric acid, reacting, applying ultrasonic vibration to form a stable suspension, and adjusting the pH, (i.b) dissolving 1,2,4-triaminobenzene dihydrochloride in proper amount of hydrochloric acid solution, carrying out sonication until the particles are completely dissolved and dispersed, slowly adding to the suspension, sonicating, heating for hydrothermal treatment, cooling down, rinsing repeatedly with water and absolute ethanol, vacuum freeze-drying, and grinding, and (i.c) dissolving the ground powder in sodium hydroxide solution, dispersing uniformly and then moving into a nickel boat to dry, placing in a tubular resistance furnace, heating under the protection of inert gas, rinsing repeatedly with acid and plenty of deionized water. USE - The method is useful for preparing thermally conductive porous graphene-epoxy composite material. ADVANTAGE - The material: has excellent toughness and strength, and excellent thermal conductivity. DETAILED DESCRIPTION - Preparing thermally conductive porous graphene-epoxy composite material comprises (i) preparing porous graphene oxide by (i.a) grinding 5-10 pts. wt. graphite chips, placing in 2-3 times concentrated sulfuric acid, adding 2-5 pts. wt. hydrogen peroxide to the concentrated sulfuric acid, reacting for 0.5-3 hours, applying ultrasonic vibration to form a stable suspension, and adjusting the pH to 5-7, (i.b) dissolving 1-8 pts. wt. 1,2,4-triaminobenzene dihydrochloride in proper amount of hydrochloric acid solution, carrying out sonication until the particles are completely dissolved and dispersed uniformly, slowly adding to the suspension, sonicating for 45-60 minutes, heating to 175-180 degrees C for 12-16 hours for hydrothermal treatment, cooling down, rinsing repeatedly with water and absolute ethanol, vacuum freeze-drying for 24 hours, and grinding for 1-5 hours, and (i.c) dissolving the ground powder in 1-2 times sodium hydroxide solution, dispersing uniformly and then moving into a nickel boat to dry, placing in a tubular resistance furnace, heating under the protection of inert gas at 490-520 degrees C for 3-5 hours, cooling, rinsing repeatedly with acid and plenty of deionized water, and drying, (ii) mixing the resulting porous graphene oxide with 3-5 pts. wt. alumina and 2-5 pts. wt. carbon nanotubes, adding to the melting furnace for heat treatment, heating to 600-650 degrees C and maintaining warm, stirring during heating until the mixture is homogeneous, adding the mixed mixture to the extruder, spraying 1-2 pts. wt. silane coupling agent, grinding and crushing uniformly, and (iii) adding the resulting powder to proper amount of absolute ethanol solution, performing ultrasonic dispersion with an ultrasonic disperser for 10-25 minutes, then pouring the dispersion into 70-140 pts. wt. molten epoxy resin and mixing, stirring the mixture for 45-60 minutes using a thermostatic magnetic stirrer, allowing to stand at room temperature for 1-8 hours, adding 1-2 pts. wt. curing agent, mixing the curing agent and the mixing uniformly, placing in an oven at 80 degrees C, performing geat curing for 3-5 hours, cooling to room temperature to obtain finished product.