▎ 摘　　要

NOVELTY - Preparing thermally conductive porous graphene-epoxy composite material comprises (1) (a) slice grinding graphite, placing 2-3 times concentrated sulfuric acid, reacting, carrying out ultrasonic oscillation, (b) adding 1,2,4-tri-aminobenzene dihydrochloride salt, dissolving, heating, cooling, washing and grinding, (c) dissolving powder, grinding, drying, (2) mixing porous graphene oxide with alumina and carbon nanotubes, adding into the melting furnace for heat process, heating, spraying and crushing and (iii) adding the powder into absolute ethyl alcohol solution, ultrasonic dispersing, pouring, stirring, allowing to stand at normal temperature, adding 1-2 pts. wt. curing agent, uniformly mixing the curing agent with mixture, placing into 80 degrees C in the oven, heating and solidifying for 3-5 hours and cooling to the room temperature to obtain conductive porous graphene-epoxy resin composite material. USE - The method is useful for preparing thermally conductive porous graphene-epoxy composite material. ADVANTAGE - The material has good resin toughness and strength and good thermal conductivity. DETAILED DESCRIPTION - Preparing thermally conductive porous graphene-epoxy composite material comprises (1) (a) slice grinding the 5-10 pts. wt. graphite, placing 2-3 times concentrated sulfuric acid, adding 2-5 pts. wt. hydrogen peroxide into concentrated sulfuric acid, reacting for 0.5-3 hours, carrying out ultrasonic oscillation to obtain stable suspension and adjusting pH to 5-7, (b) adding 1-8 pts. wt. 1,2,4-tri-aminobenzene dihydrochloride salt, dissolving in proper amount of hydrochloric acid solution, ultrasonic processing for completely dissolving and dispersing uniformly, slowly adding to the suspension into the particle, performing ultrasonic process for 45-60 minutes, heating to 175-180 degrees C and hydrothermal process for 12-16 hours , cooling, repeatedly washing with water and absolute ethyl alcohol, vacuum freezing and drying for 24 hours and grinding for 1-5 hours, (c) dissolving the powder, grinding at 1-2 times of sodium hydroxide in solution, dispersing uniformly, drying into nickel boat, placing into tube type resistance furnace, under the protection of inert gas, heating the temperature to 490-520 degrees C for 3-5 hours, cooling, repeatedly washing with acid and a lot of de-ionized water, and drying, (2) mixing the porous graphene oxide with 3-5 pts. wt. alumina and 2-5 pts. wt. carbon nanotubes, adding into the melting furnace for heat process, heating to 600-650 degrees C and insulating process, heating in the process, stirring until uniformly mixed material, adding the mixed material into the extruder, spraying 1-2 pts. wt. silane coupling agent, extruding, uniformly grinding and crushing and (iii) adding the powder obtained in step (ii) into absolute ethyl alcohol solution, ultrasonic dispersing with ultrasonic disperse machine for 10-25 minutes, pouring the dispersion into 70-140 pts. wt. fused epoxy resin, mixing, stirring the mixture with the constant temperature magnetic stirrer for 45-60 minutes, allowing to stand at normal temperature for 1-8 hours, adding 1-2 pts. wt. curing agent, uniformly mixing the curing agent with mixture, placing into 80 degrees C in the oven, heating and solidifying for 3-5 hours and cooling to the room temperature to obtain conductive porous graphene-epoxy resin composite material.