▎ 摘　　要

NOVELTY - Preparing polymer/graphene-magnetic nanoparticle foam composite material comprises (i) preparing graphene solution, (ii) adding diaminodiphenyl ether (ODA) powder into graphene solution, mixing to obtain solution A, (iii) adding pyromellitic dianhydride (PMDA) powder into mixed solution A to obtain solution B, (iv) adding magnetic nanoparticles into solution B and stirring to obtain solution C, and (v) pouring solution C on the plate, and then placing in flocculation tank using water as flocculant, and drying after coagulation. USE - The method is useful for preparing polymer/graphene-magnetic nanoparticle foam composite material. ADVANTAGE - The composite material: exhibits superior properties in electromagnetic wave absorption, has simple operation, strong operability, and excellent reproducibility up to 95% yield.