▎ 摘　　要

NOVELTY - Preparing MXene/graphene oxide (GO) composite sponge reinforced resin matrix composite material comprises (A) taking titanium aluminum carbide and lithium fluoride in a mass ratio of 1:1.6-2, and adding lithium fluoride into hydrochloric acid, (B) collecting MXene after ultrasonication to obtain an aqueous MXene solution, (C) placing the solid phase obtained by directional freezing into the refrigerator for 1 hour, and obtaining the MXene/GO oriented porous structure sponge, (D) subjecting the composite resin to pressure-retaining and de-foaming treatment in a vacuum drying oven until the upper layer of bubbles disappears, and (E) taking out the above resin, slowly pouring it into the mold and making it evenly distributed, and obtaining the MXene/GO sponge reinforced resin matrix composite material. USE - The method is useful for preparing MXene/graphene oxide (GO) composite sponge reinforced resin matrix composite material, which is used in nanoscopic-microscopic-macroscopic. ADVANTAGE - The method prepares and synthesizes the composite sponge reinforced resin-based composite material with improved bending and tensile strength and modulus and increased absorption energy at break and elongation, compared with the single-component enhancement, the preparation method is simple, easy to implement, economical and environmentally friendly. DETAILED DESCRIPTION - Preparing MXene/graphene oxide (GO) composite sponge reinforced resin matrix composite material comprises (A) (1) taking titanium aluminum carbide and lithium fluoride in a mass ratio of 1:1.6-2, and adding lithium fluoride into hydrochloric acid, (2) fully stirring hydrochloric acid and lithium fluoride, slowly adding titanium aluminum carbide to the mixed solution, and continuing magnetic stirring, and (3) adding titanium aluminum carbide, and continuing the magnetic stirring etching of the mixed solution, (B) (1) placing the mixed solution obtained in the step (1) into a centrifuge tube, washing using 1 mol/l concentrated hydrochloric acid, and then washing using deionized water until the pH value of the solution is greater than 6, (2) adding absolute ethanol to the centrifuge tube and shaking by hand for more than 15 minutes, and using the alcoholic hydroxy group to promote the further separation of the lamellar MXene with hydroxy groups, (3) placing the centrifuge tube into the centrifuge for 2-3 times of centrifugation, after each centrifugation, vortexing for more than 30 minutes, and after each centrifugation to remove the supernatant, supplementing with deionized water to complete the alcohol washing process, (4) placing the alcohol-washed solution into an ultrasonic machine for ultrasonic treatment, and introducing nitrogen gas into the ultrasonic process as a protective gas, and (5) collecting MXene after ultrasonication to obtain an aqueous MXene solution, (C) (1) mixing the aqueous MXene solution with concentration of 5-15 mg/ml and the GO solution with concentration of 0.5-1.5 mg/ml according to the ratio of the photo layer fraction of 1:1, (2) performing ultrasonic treatment, introducing nitrogen gas into the ultrasonic process as a protective gas, and then performing magnetic stirring, (3) pouring the mixed solution obtained above into a polytetrafluoroethylene mold, pouring the mold into liquid nitrogen below, and using liquid nitrogen for directional freezing, and (4) placing the solid phase obtained by directional freezing into the refrigerator for 1 hour, taking out and demolding, placing the frozen material into a vacuum dryer for freeze-drying, after the completion, raising the temperature for 110-130 hours to 25°C to achieve the effect of freeze-drying, and obtaining the MXene/GO oriented porous structure sponge, (D) (1) taking 50 g epoxy resin into a beaker, fully impregnating 0.15 g of the MXene/GO oriented porous structure sponge obtained in the step (3) in epoxy resin, and placing it into a vacuum oven for vacuum pressure-holding impregnation, (2) stirring the resin mixture under the action of shear flow, and (3) subjecting the composite resin to pressure-retaining and de-foaming treatment in a vacuum drying oven until the upper layer of bubbles disappears, and (E) (1) pouring the epoxy resin obtained in step (4) into a beaker, weighing the curing agent and slowly pouring it into it, stirring slowly with a glass rod until there is no oil on the surface and the mixing system is uniform and stable, (2) placing the mixed resin into a vacuum drying box and pump it until the bubbles disappear, and controlling the bubble-removing time to be no less than 10 minutes, and (3) taking out the above resin, slowly pouring it into the mold and making it evenly distributed, placing it in an oven to adjust the temperature to 40-50℃, keeping the temperature for not less than 24 hours, taking out and demolding, and obtaining the MXene/GO sponge reinforced resin matrix composite material.