▎ 摘　　要

NOVELTY - Preparation of graphene aerogel/polyurethane foam conductive composite material involves (s1) preparing graphene oxide/chitosan solution by mixing a graphene oxide dispersion with a chitosan acetic acid solution, and continuously performing a mechanical stirring under an ultrasonic action for 10-60 minutes until the solution is uniformly dispersed, (s2) filling polyurethane open-cell foam by putting a cut polyurethane open-cell foam into a vacuum-pump able container, (s3) preparing graphene oxide aerogel/polyurethane open-cell foam composite material by transferring the polyurethane open-cell foam filled with the graphene oxide/chitosan solution obtained in the step (s2) into a mold, and (s4) performing post-treatment by putting the composite material prepared in the step (s3) into a vacuum oven, conducting a heat treatment at 90-200° C in sequence for a period of time under vacuum conditions, and finally returning to normal temperature and normal pressure. USE - Preparation of graphene aerogel/polyurethane foam conductive composite material used as novel intelligent material, and in wearable sensor, strain gauge, and pressure sensor (claimed). ADVANTAGE - The method provides graphene aerogel/polyurethane foam conductive composite material having excellent mechanical property, electroconductivity piezoresistive property, compression recovery, and durability. DETAILED DESCRIPTION - Preparation of graphene aerogel/polyurethane foam conductive composite material involves (s1) preparing graphene oxide/chitosan solution by mixing a graphene oxide dispersion with a chitosan acetic acid solution, and continuously performing a mechanical stirring under an ultrasonic action for 10-60 minutes until the solution is uniformly dispersed, (s2) filling polyurethane open-cell foam by putting a cut polyurethane open-cell foam into a vacuum-pump able container, vacuumizing until the air pressure in the container is less than an atmospheric pressure of 80 kPa, then pouring the solution obtained in the step (s1) into the container, continuously pumping until the polyurethane foam is completely immersed in the solution, and finally returning to normal pressure, (s3) preparing graphene oxide aerogel/polyurethane open-cell foam composite material by transferring the polyurethane open-cell foam filled with the graphene oxide/chitosan solution obtained in the step (s2) into a mold, inserting a heat transfer plate at one end of the mold into a freezing tank filled with freezing liquid for freezing, and after completely frozen, quickly transferring a frozen sample to a freeze dryer for a lyophilization for 1.5-3 days, and (s4) performing post-treatment by putting the composite material prepared in the step (s3) into a vacuum oven, conducting a heat treatment at 90-200° C in sequence for a period of time under vacuum conditions, and finally returning to normal temperature and normal pressure.