▎ 摘　　要

NOVELTY - Preparing compressible resilient graphene aerogel involves: (1) preparing graphene inkjet precursor by placing the graphene in deionized water to prepare a graphene dispersion at a concentration of 8-10 mg/ml, treating the dispersion under ultrasonic conditions for 2-5 hours to obtain a uniform and stable graphene dispersion, adding an appropriate amount of ethylenediamine additive to the graphene dispersion, and ultrasonically processing at room temperature for 0.5-1 hours; (2) preparing carbon nanotube inkjet precursor by placing carbon nanotubes in deionized water, then treating under ultrasonic conditions for 20-30 minutes to prepare a carbon nanotube dispersion with a concentration of 8-10 mg/ml, adding an appropriate amount of ethylenediamine additive to the carbon nanotube dispersion, and ultrasonically processing at room temperature for 0.5 hours; (3) printing three-dimensional graphene blocks; (4) carrying out hydrothermal reaction; and (5) freeze-drying. USE - The method is useful for preparing compressible resilient graphene aerogel. ADVANTAGE - The method utilizes three-dimensional printing technology to introduce carbon nanotubes into graphene, and carbon nanotubes and graphene alternately appear, thus effectively avoiding the curling and stacking of graphene and carbon nanotube structures in the formed aerogel, where the success rate of the aerogel is higher, and the structure of the carbon nanotubes is formed between the graphene layers. DETAILED DESCRIPTION - Preparing compressible resilient graphene aerogel involves: (1) preparing graphene inkjet precursor by placing the graphene in deionized water to prepare a graphene dispersion at a concentration of 8-10 mg/ml, treating the dispersion under ultrasonic conditions for 2-5 hours to obtain a uniform and stable graphene dispersion, adding an appropriate amount of ethylenediamine additive to the graphene dispersion, and ultrasonically processing at room temperature for 0.5-1 hours; (2) preparing carbon nanotube inkjet precursor by placing carbon nanotubes in deionized water, then treating under ultrasonic conditions for 20-30 minutes to prepare a carbon nanotube dispersion with a concentration of 8-10 mg/ml, adding an appropriate amount of ethylenediamine additive to the carbon nanotube dispersion, and ultrasonically processing at room temperature for 0.5 hours; (3) printing three-dimensional graphene blocks using a three-dimensional printing platform by taking three-dimensional printing platform having two inkjet needles, where each inkjet needle corresponds to a liquid cartridge, one of the liquid cartridge contains the graphene inkjet precursor and the other contains the carbon nanotube inkjet precursor, where the two inkjet needles work alternately and printing a layer of graphene inkjet precursor and a layer of carbon nanotube inkjet precursor from bottom to top to form a set three-dimensional graphene block; (4) carrying out hydrothermal reaction to obtain three-dimensional graphene hydrogel by closing the cold station power supply until the sample and the cold table surface are out of contact, quickly transferring to a container with the same size and shape, then transferring to a reaction kettle to carry out hydrothermal reaction under protective gas, and gradually increase the temperature at a heating rate of 10 degrees C/hour to 120-240 degrees C for 10-24 hours, where the shielding gas is nitrogen or argon; and (5) freeze-drying to obtain graphene aerogel by replacing the hydrogel by hydroalcohol, directly placing the hydrogel in a uniformly mixed 10-20% hydroalcoholic solution, dialyzing for more than 6 hours, then placing in a refrigerator, freezing at -20 degrees C for 24-48 hours, putting the frozen hydrogel into a tray built arranged in a freeze-drying machine, maintaining the freeze-drying machine under vacuum of 10 Pa or less, and freeze-drying for 24-48 hours to obtain a carbon nanotube graphene composite aerogel.