▎ 摘　　要

NOVELTY - Preparing high dielectric low loss graphene/polymethyl methacrylate composite material involves dispersing graphene oxide in deionized water and obtaining graphene oxide dispersion after sonication, purifying styrene and butyl acrylate with NaOH solution, adding auxiliary pH buffer, emulsifier and initiator, and preparing styrene-butyl acrylate emulsion by fine emulsion polymerization, adding graphene oxide dispersion to an emulsion of styrene-butyl acrylate, and performing a reduction reaction using hydrazine hydrate to prepare a graphene/styrene-butyl acrylate composite material. A poly(methyl methacrylate) and a graphene/styrene-butyl acrylate composite material are hot-pressed at 170-180 degrees C to obtain a graphene/polymethyl methacrylate composite material. USE - Method for preparing high dielectric low loss graphene/polymethyl methacrylate composite material. ADVANTAGE - The method enables to prepare high dielectric low loss graphene/polymethyl methacrylate composite material which is simple to prepare, significantly increase dielectric constant and have a lower dielectric loss, which is as low as 0.049 at a frequency of 10000 Hertz.