▎ 摘　　要

NOVELTY - A lightweight, flexible graphite alkenyl composite absorbing film is reduction-oxidation graphene oxide, iron(II,III) oxide nanoparticle compound and carbon fiber by combining X-ray diffraction, Fourier transform infrared spectroscopy test and scanning electron microscope observation. The film has good tensile strength and ferromagnetism,, positive corresponding relation between saturated magnetization and iron(II,III) oxide nanoparticle mass content, frequency of 10.64 GHz, maximum reflection loss of - 22.18 dB, and frequency band width - 10 dB of less than 3.12 GHz (9.2-12.32 GHz). USE - Lightweight, flexible graphite alkenyl composite absorbing film used in information, electronic, exploration and military field. ADVANTAGE - The method has low preparation cost, easy operation and strong repeatability. DETAILED DESCRIPTION - A lightweight, flexible graphite alkenyl composite absorbing film is reduction-oxidation graphene oxide, iron(II,III) oxide nanoparticle compound and carbon fiber by combining X-ray diffraction, Fourier transform infrared spectroscopy test and scanning electron microscope observation. The film has good tensile strength up to 20.24 MPa, positive corresponding relation between saturated magnetization and iron(II,III) oxide nanoparticle mass content, thickness of 2 mm, frequency of 10.64 GHz, maximum reflection loss of - 22.18 dB, and frequency band width - 10 dB of less than 3.12 GHz (9.2-12.32 GHz). An INDEPENDENT CLAIM is included for preparation of the lightweight, flexible graphite alkenyl composite absorbing film comprising using Hummers method, preparing graphene oxide (GO) colloid, surface processing carbon fiber (CF) micropowder by liquid phase oxidation, washing using deionized water to neutral, drying, dissolving carbon fiber micropowder using citric acid, ultrasonically dispersing to obtain carbon fiber micropowder suspension, mixing with iron(II,III) oxide nanoparticle, ultrasonically processing to obtain iron(II,III) oxide nanoparticle-carbon fiber composite material mixed solution, adding colloid with, mechanically stirring to obtain GO-F-CF solution, transferring into flat glass dish, placed in vacuum drying box, drying and forming at 60 degrees C at vacuum degree of not greater than 0.06 MPa, heating to 120 degrees C at vacuum degree of 0.01 MPa, preserving heat for 12 hours, and reducing.