▎ 摘　　要

NOVELTY - Preparing composite adhesive involves subjecting graphite powder to liquid phase exfoliation in chloroform by ultrasound with the assistance of pyrenylated hyperbranched polyethylene to obtain a stably dispersed graphene dispersion, mixing multiwalled carbon nanotubes, pyrenyl hyperbranched polyethylene, and chloroform, subjecting to ultrasonication, centrifugation, vacuum filtration of the supernatant, adding chloroform to the resulting filter film and ultrasonication again to obtain stable dispersed multiwalled carbon nanotubes tube dispersion. The chloroform, acrylic adhesive, multiwalled carbon nanotube dispersion, graphene dispersion, and curing agent are mixed uniformly in a reaction vessel, stirred magnetically for 6-12 hours, and then directly scraped and coated the PET film, cured at 40-50℃ for 12-18 hours to obtain the adhesive. USE - Method for preparing composite adhesive used for manufacturing label, adhesive tape and protective glue for bonding electronic device, fixing, radiating fin to microprocessor and other electronic devices. ADVANTAGE - The method produces product which has high thermal conductivity and high conductivity, to maintain the adhesive bonding strength, improves the heat conducting coefficient and conductivity and adhesive substrate with extremely low heat conductivity coefficient. DETAILED DESCRIPTION - Preparing composite adhesive involves subjecting graphite powder to liquid phase exfoliation in chloroform by ultrasound with the assistance of pyrenylated hyperbranched polyethylene to obtain a stably dispersed graphene dispersion, mixing multiwalled carbon nanotubes, pyrenyl hyperbranched polyethylene, and chloroform, subjecting to ultrasonication, centrifugation, vacuum filtration of the supernatant, adding chloroform to the resulting filter film and ultrasonication again to obtain stable dispersed multiwalled carbon nanotubes tube dispersion. The chloroform, acrylic adhesive, multiwalled carbon nanotube dispersion, graphene dispersion, and curing agent are mixed uniformly in a reaction vessel, stirred magnetically for 6-12 hours, and then directly scraped and coated the PET film, cured at 40-50℃ for 12-18 hours to obtain the adhesive. The multi-walled carbon nanotube dispersion and the graphene dispersion are fed according to a mass ratio of multiwalled carbon nanotubes and graphene of 0.5-3:1. The total mass fraction of graphene and multiwalled carbon nanotubes is 1-15%.