▎ 摘　　要

NOVELTY - Modified graphene nanomaterial, comprises 15-18 pts. wt. graphite powder, 25-35 pts. wt. deionized water, 15-25 pts. wt. polysorbate, 1-5 pts. wt. catalytic auxiliary agent, 1-5 pts. wt. magnesium oxide, 10-15 pts. wt. molybdenum pentachloride aqueous solution, 5-10 pts. wt. copper chloride aqueous solution, 10-15 pts. wt. potassium chloride aqueous solution, 1-3 pts. wt. modified calcium carbonate powder, 1-5 pts. wt. modified bauxite, and 10-15 pts. wt. sodium N-dodecylbenzene sulfonate. USE - The modified graphene nanomaterial is useful in microelectronic device or electronic component (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing modified graphene nanomaterial, comprising (i) mixing catalytic auxiliary agent, magnesium oxide and deionized water complex reaction to obtain slurry, spraying the slurry, granulating, drying and roasting to obtain magnesium oxide carrier rich in active substances with a particle size of 15-80 mu m and a specific surface area of 20-150 m2/g; (ii) placing graphite powder and deionized water in a reactor according to a certain ratio, and treating for 30-60 minutes under the ultrasonic power of 600-1500 W to obtain graphite dispersion; (iii) adding sodium N-dodecylbenzene sulfonate into the graphite dispersion, and uniformly stir until uniform; (iv) mixing molybdenum pentachloride aqueous solution, copper chloride aqueous solution and potassium sulfide aqueous solution, ultrasonically treating for 8-15 minutes, adding polysorbate, magnetically stirring for 10-39 minutes to obtain molybdenum/copper sulfide particles; (v) heating the molybdenum/copper sulfide particles, the solution obtained in step (iii), and the magnesium oxide carrier rich in active substances to 500-900 degrees C for 8-15 hours; (vi) adding the substances obtained in step (v) into the stirred tank, taking modified calcium carbonate powder and modified bauxite, turning on the stirring tank and stirring for 10-15 minutes, heating in the stirred tank to 100-150 degrees C, treating for 1-3 hours under 300-500 W ultrasonic power, stirring at high speed for 30-60 minutes, taking out and allowing to stand to prepare a highly thermally conductive modified graphene nanomaterial.