▎ 摘　　要

NOVELTY - Preparing conductive adhesive comprises e.g. taking cage polysilsesquioxane compounds (I), pyrene-containing monomer (II), alpha-diimine palladium catalyst and anhydrous organic solvent, polymerizing, performing separation and purification to obtain HBPE-POSS-Py polymer, mixing and reacting graphite powder and HBPE-POSS-Py polymer with organic solvent A, sealing to obtain graphene initial dispersion liquid B, then performing low-speed centrifugation and static treatment, performing high-speed centrifugation or vacuum filtration on the obtained graphene dispersion C to remove the excess HBPE-POSS-Py, mixing carbon nanotube powder, HBPE-POSS-Py polymer and organic solvent A to obtain carbon nanotube dispersion E containing excess HBPE-POSS-Py polymer, mixing ethyl orthosilicate and dibutyltin dilaurate to prepare 107 glue curing agents, and mixing graphene dispersion, carbon nanotube dispersion and 107 gum base, and adding 107 glue curing agent into dried mixture, and curing. USE - The method is useful for preparing conductive adhesive. ADVANTAGE - The method: improves the electrical conductivity, thermal conductivity, and bonding performance of the conductive adhesive. DETAILED DESCRIPTION - Preparing conductive adhesive comprises (i) taking cage polysilsesquioxane compounds of formula (I), pyrene-containing monomer of formula (II), α-diimine palladium catalyst and anhydrous organic solvent, carrying out polymerization reaction under anhydrous and oxygen-free ethylene atmosphere, performing separation and purification to obtain HBPE-polyhedral oligomeric silsesquioxane-pyrene (HBPE-POSS-Py) polymer, (ii) mixing and reacting graphite powder and HBPE-POSS-Py polymer with organic solvent A, sealing, and ultrasonicating the resulting mixture to obtain graphene initial dispersion liquid B, then performing low-speed centrifugation and static treatment to obtain graphene dispersion C containing excess HBPE-POSS-Py polymer, performing high-speed centrifugation or vacuum filtration on the obtained graphene dispersion C to remove the excess HBPE-POSS-Py polymer contained, then collecting the solid or filter membrane, and ultrasonically dispersing into organic solvent A to obtain graphene dispersion liquid, (iii) mixing carbon nanotube powder, HBPE-POSS-Py polymer and organic solvent A, and ultrasonicating resulting mixture to obtain carbon nanotube initial dispersion liquid D, then performing low-speed centrifugation and static treatment to obtain carbon nanotube dispersion E containing excess HBPE-POSS-Py polymer, then performing high-speed centrifugation or vacuum filtration on the obtained carbon nanotube dispersion E to remove excess HBPE-POSS-Py polymer contained, then collecting solid or filter membrane, and ultrasonically dispersing into organic solvent A to obtain carbon nanotube dispersion, (iv) mixing ethyl orthosilicate and dibutyltin dilaurate in a mass ratio of 2-4:1 to prepare 107 glue curing agents, and (v) mixing graphene dispersion, carbon nanotube dispersion and 107 gum base, and ultrasonically dispersing, placing mixed solution in an oven at 60-120 ℃ to dry the solvent, adding 107 glue curing agent prepared in step (iv) into dried mixture, then placing in an ice-water bath, stirring for 10-30 minutes, pouring the mixed composite material on the polyethylene terephthalate film, then placing in a normal temperature vacuum oven for 10-20 minutes to remove air bubbles, then transferring to a blast oven at 30-80°C for 6-12 hours, and curing to obtain conductive adhesive, where mass ratio between graphene and carbon nanotube is 0.2-5:1; mass ratio between 107 gum base glue and 107 glue curing agents is 5-20:1 (taking the total mass of 107 gum base glue and 107 glue curing agents as 100%); and total mass fraction of graphene and multiwalled carbon nanotube is 3-15%. R = isobutyl.