▎ 摘　　要

NOVELTY - Preparing conductive polymer-based composition electromagnetic shielding material comprises e.g. combining a water dispersion of a blend of nanocellulose and graphene oxide, mixing the blended water dispersion prepared in step (i) with a polymer solution, and performing ultrasonic and emulsifying to obtain an oil-in-water Pickering emulsion which is stabilized by nanocellulose and graphene oxide, allowing to stand, obtaining an emulsion gel, where the polymer solution is a solution in which the polymer is dissolved in an organic solvent, subjecting the obtained emulsion gel to suction filtration, and washing with a mixed solution of an organic solvent and an ethanol solution used in the polymer solution to obtain a nanocellulose/graphene oxide/polymer to obtain filter cake, preparing a hydrazine hydrate solution, immersing the filter cake into the hydrazine hydrate solution, reacting, and then placing the filter cake in a hot pressing mold. USE - The method is useful for preparing conductive polymer-based composition electromagnetic shielding material. ADVANTAGE - The method: is simple to process, and easy to obtain the raw materials; produces shielding material, which has light weight, small thickness, good electrical conductivity, and meets the requirements of the civil electromagnetic shielding material in the X-band, and utilizes in the civil electromagnetic shielding material. DETAILED DESCRIPTION - Preparing conductive polymer-based composition electromagnetic shielding material comprises (i) combining a water dispersion of a blend of nanocellulose and graphene oxide, where the mass concentration of nanocellulose is 0.01-0.1%, and the graphene oxide has a mass concentration of 0.1-1%; (ii) mixing the blended water dispersion prepared in step (i) with a polymer solution having a mass concentration of 0.5-7% according to a volume ratio of 1-10:1, and performing ultrasonic at an ultrasonic wave of 100-1000 W and emulsifying for 0.5-30 minutes to obtain an oil-in-water Pickering emulsion which is stabilized by nanocellulose and graphene oxide, allowing to stand for 12-24 hours, obtaining an emulsion gel, where the polymer solution is a solution in which the polymer is dissolved in an organic solvent; (iii) subjecting the obtained emulsion gel to suction filtration, and washing with a mixed solution of an organic solvent and an ethanol solution used in the polymer solution in the step (ii) for 4-6 times to obtain a nanocellulose/graphene oxide/polymer to obtain filter cake; (iv) preparing a hydrazine hydrate solution having a mass concentration of 1-20%; (v) immersing the filter cake obtained in the step (iii) into the hydrazine hydrate solution prepared in the step (iv), reacting at 60-100 degrees C for 0.5-3 hours, and then placing the filter cake in a hot pressing mold and continuing the reaction in an oven at 60-100 degrees C and baking to a semi-dry state; and (vi) placing the semi-dry state filter cake obtained in the step (v) in a flat plate hot press for hot pressing to obtain a nanocellulose/reduced graphene oxide/polymer composition electromagnetic shielding material, which is a conductive polymer-based composition electromagnetic a shielding material and the nanocellulose is a cellulose material having a size in the nanometer range of at least one dimension comprising a cellulose nanocrystal and a cellulose nanofiber having a morphology structure prepared by extracting from a raw material, where the raw material is cotton, wood, bamboo or hemp, the graphene oxide is in a single layer structure and the thickness of the sheet is 0.8-1.2 nm, the polymer is a non-aqueous polymer, which is specifically polystyrene, polycarbonate, polyamide, polylactic acid, polymethylmethacrylate, polycaprolactone, polylactic acid-glycolic acid copolymer or cellulose acetate and the organic solvent is dichloromethane, 1,2-dichloroethane, chloroform, n-hexane or cyclohexane, where the hot pressing process in the step (vi) adopts a two-step method: first at 80 degrees C, hot pressing for 5-15 minutes under the condition of pressure of 0.5 MPa, further removing the organic solvent in the filter cake, then at 150 degrees C, hot pressing 15-60 minutes under the condition of pressure of 12 MPa and purity of the chemical reagent and the raw material are both analytically pure and above.