▎ 摘　　要

NOVELTY - The film includes polymer in which a filler is dispersed. The filler includes a nanostructure including multilayer graphene nanotubes disposed between layers or on a surface of the multilayer graphene and connected to the graphene, and a metal oxide connected to the nanotubes. The nanostructure is prepared by mixing graphene oxide, organometallic compound containing magnetic particles, and foaming agent in a solvent to prepare a dispersion, and irradiating the dispersion with microwave. USE - Polymer-based, wideband electromagnetic wave shielding film, e.g., for wearable electronics, flexible devices. ADVANTAGE - The film provides improved electromagnetic wave shielding and absorption performance, by applying a multilayer graphene-nanotube-metal oxide nanostructure in which a conductive material and a magnetic material are complexly combined by microwave irradiation, as a polymer filler. The film also has excellent restoring force, flexibility and durability so as to be used as shielding material in wearable electronics or flexible devices. Additional reducing agent such as hydrazine is not used, simplifying process and ensuring environment friendly property. DESCRIPTION OF DRAWING(S) - The drawing shows the scanning electron microscope photographs of a multilayer graphene-nanotube-metal oxide nanostructure.