▎ 摘　　要

NOVELTY - An ionic liquid modified graphene with wave absorbing properties is prepared by taking 0.1-5.0 g ionic liquid and 0.01-1.0 g graphene, mortar grinding for 10-100 minutes, dispersing in 20-200 mL absolute ethanol for 1-3 hours to obtain dispersion, stirring at 80 degrees C for 5-24 hours, centrifuging at rate of 8000 revolutions/minute for 15-30 minutes, filtering, taking precipitate, washing with 50-500 mL absolute ethanol, and drying at 80 degrees C for 10-24 hours. The ionic liquid is 1-alkyl-3-methylimidazole tetrafluoroborate, 1-alkyl-3-methylimidazole hexafluorophosphate, N-alkylpyridine tetrafluoroborate, 1-butylmethylimidazole tetrafluoroborate, 1-aminoethyl-3-methylimidazole bromide, 1-butyl-3-methylimidazole acetate and/or 1-butyl-3-methylimidazolium dinitrile amine salt. USE - Method for preparing ionic liquid modified graphene with wave absorbing properties. ADVANTAGE - The method is simple, easy and suitable for industrialization, and can introduce nitrogen, fluoride, boron and other elements into the surface of graphene to obtain product with excellent wave absorbing properties.