▎ 摘　　要

NOVELTY - Preparing sound-absorbing conductive composite plate comprises e.g. (i) placing the basalt particles in the mold, pouring melted polyurethane into mold and solidifying to obtain preprocessed particles; (ii) performing vacuum pressure treatment pre-processed particles in vacuum pressure machine; (iii) obtaining foamed material; (iv) obtaining the dispersion liquid; (v) preparing three-dimensional graphene; (vi) reacting three-dimensional graphene and cooling to obtain large size graphene aerogel; (vii) obtaining heat treated large size graphene aerogel; (viii) soaking heat treated large size graphene aerogel in the curing liquid, vacuumizing and drying to obtain the curing block and solidifying continuously to obtain the sound-absorbing conductive core material; and (ix) placing the sound absorbing conductive core material between the two layers of polyvinyl chloride foaming plate, bonding using phenolic resin as adhesive and heavy-pressure shaping. USE - The method is useful for preparing sound-absorbing conductive composite plate. ADVANTAGE - The method prepares sound-absorbing conductive composite plate which is light in weight with mechanical properties while sound-absorbing and conducting electricity. DETAILED DESCRIPTION - Preparing sound-absorbing conductive composite plate comprises (i) cleaning the basalt, ball milling to obtain basalt particles, placing the basalt particles in the mold, adding the polyurethane particles into a three-mouth flask equipped with a stirrer, heating at constant temperature in the oil bath, starting initial stirring until melting polyurethane, adjusting the stirring speed for secondary stirring, pouring the melted polyurethane into the mold, sealing the mold, vacuumizing, placing the mold in the constant temperature blast drying box for solidifying to obtain the preprocessed particles; (ii) placing the pre-processed particles in the vacuum pressure machine and performing vacuum pressure treatment at 100 W, 2 atmospheric pressure for 10-20 minutes and at vacuum degree of 2-3 Pa; (iii) adding the pre-treated particles into the polyacrylate foaming system, adding foaming agent sodium bicarbonate, starting to stir and curing to obtain the foamed material; (iv) ball milling and crushing the foamed material to obtain the foamed material powder, adding the foamed material powder into the styrene at mass ratio of 3:4-3:5 and dispersing uniformly to obtain the dispersion liquid; (v) preparing the graphene oxide into graphene dispersion liquid with concentration of 20 mg/ml, dispersing ultrasonically and uniformly, diluting into 10 mg/ml dispersion liquid, pouring the second dispersion liquid into the freeze drying mold, adjusting the freeze dryer into freezing mode, cooling and freezing, adjusting the freeze drier into a drying mode, vacuumizing at 1 pa, heating the mold, maintaining the temperature for a period of time and cooling to obtain the three-dimensional graphene; (vi) adding the three-dimensional graphene into the tubular heating furnace, introducing mixed gas of hydrogen and argon gas, heating to 1000degrees Celsius, preserving temperature, reacting and cooling to obtain the large size graphene aerogel; (vii) filling the large size graphene gas gel with 75% hydrazine hydrate in the dryer, sealing, placing into the blast drying box, heating to 90degrees Celsius for the first time, starting to react, reacting the blast drying box at 200degrees Celsius and cooling to obtain the heat treated large size graphene aerogel; (viii) mixing the dispersion and the curing agent vinyl triamine uniformly to obtain the curing liquid, pouring the curing liquid into the mold, soaking the heat treated large size graphene aerogel in the curing liquid so that the large size graphene aerogel absorbs the curing liquid to be saturated, vacuumizing and drying to obtain the curing block and adding the curing block into the drying box to solidify continuously to obtain the sound-absorbing conductive core material; and (ix) placing the sound absorbing conductive core material between the two layers of polyvinyl chloride foaming plate, bonding using phenolic resin as adhesive and heavy-pressure shaping. An INDEPENDENT CLAIM is also included for sound-absorbing conductive composite plate, prepared as mentioned above, comprises 70-80 pts. wt. foamed material, 50-60 pts. wt. sound-absorbing conductive core material, 100-120 pts. wt. polyvinyl chloride foam board, and 200-300 pts. wt. phenolic resin adhesive, the foaming material, obtained after processing basalt, polyurethane, and polyacrylate and the sound-absorbing conductive core material obtained by after processing foaming material, styrene, and three-dimensional graphene.