▎ 摘　　要

NOVELTY - Preparing long-chain conjugated pi -bond cross-linked super-tough high-conductivity graphene composite film comprises e.g. stirring and uniformly mixing pyrenemethanol and 10,12-didodecanedioic acid (DDA))(sic), adding 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDCI), 4-dimethylaminopyridine (DMAP) and dichloromethane (DCM) and carrying out stirring reaction for a period of time to obtain BPDD; uniformly dissolving the BPDD in DCM using a stirring method to obtain a BPDD dispersion liquid; preparing graphene oxide (GO) into uniform GO aqueous solution by using a stirring ultrasonic method; assembling the GO aqueous solution obtained into a self-supported GO film by adopting a vacuum suction filtration method; soaking the GO thin film obtained in the step in hydroiodic acid, washing and drying to obtain a reduced graphene oxide (rGO) thin film; soaking rGO thin film under dark condition so that BPDD is adsorbed on the surface of rGO nanosheet through a conjugated pi -bond. USE - The method is useful for preparing long-chain conjugated pi -bond cross-linked super-tough high-conductivity graphene composite film. ADVANTAGE - The composite film prepared has maximum tensile strength of 1054 MPa, and the corresponding toughness is 36 MJ/m3, electrical conductivity of 1192 S/cm, optimized ultra-high anti-fatigue performance and excellent electromagnetic shielding effectiveness. DETAILED DESCRIPTION - Preparing long-chain conjugated pi -bond cross-linked super-tough high-conductivity graphene composite film comprises (a) stirring and uniformly mixing pyrenemethanol and 10,12-didodecanedioic acid (DDA)), adding 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDCI), 4-dimethylaminopyridine (DMAP) and dichloromethane (DCM) and carrying out stirring reaction for a period of time to obtain BPDD; (b) uniformly dissolving the BPDD in DCM using a stirring method to obtain a BPDD dispersion liquid; (c) preparing graphene oxide (GO) into uniform GO aqueous solution by using a stirring ultrasonic method; (d) assembling the GO aqueous solution obtained into a self-supported GO film by adopting a vacuum suction filtration method; (e) soaking the GO thin film obtained in the step in hydroiodic acid, washing and drying to obtain a reduced graphene oxide (rGO) thin film; (f) soaking rGO thin film under a dark condition so that the BPDD is adsorbed on the surface of the rGO nanosheet through a conjugated pi -bond, and washing and drying to obtain a composite film; and (g) carrying out ultraviolet irradiation on the composite film obtained under the protection of inert gas.