▎ 摘　　要

NOVELTY - The sound-absorbing material has a graphene material which is porous sponge, the porosity of the porous sponge is 90%, and the density of the graphene materials is from 0.2-10 mg/cm3. The first and second data are the same. The solvent is water or organic solvent. The first and second data are the same. The organic solvent is lower alcohol, N, N-dimethyl formamide and acetone. The lower alcohol is methanol, ethanol, ethylene glycol and isopropyl alcohol. The concentration of the graphene oxide in the graphene oxide dispersion liquid is 0.2mg/mL to 1mg/mL. The temperature of the solvent thermal reaction is 120-200 degrees centigrade and the solvent thermal reaction time is 9h to 16h. USE - Sound absorbing material for use in ultrasonic inspection device used for controlling and adjusting reverberation time in room. Can also be used in ventilation air conditioner pipeline. ADVANTAGE - The sound absorbing material has good wide spectrum sound-absorbing and noise-reducing performance, good sound absorbing effect, wide application range and multi-occasion application, and is simple and controllable. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the sound absorbing material.