▎ 摘　　要

NOVELTY - Electromagnetic shielding natural rubber comprises 100 pts. wt. natural rubber; 0-9 pts. wt. rubber auxiliary agent and not 0; 0.1-10 pts. wt. conductive three-dimensional reduction graphene oxide composite filler; the conductive three-dimensional reducing graphene oxide composite filler is formed by forming a poly-dopamine functional layer on the surface aggregate the foam template with three dimensional network structure by dopamine, then dipping the foam template covered with the polydopamine layer into the graphene oxide dispersion liquid, through the hydrogen bond and electrostatic interaction between amino or hydroxy of polydopamine and oxygen-containing functional group on surface of graphene oxide. The graphene oxide is coated on the surface of the foam template. The foam template is carbonized by high temperature processing to reduce the graphene oxide, obtaining three-dimensional reduced graphene oxide composite filler. USE - Electromagnetic shielding natural rubber for effectively constructing three-dimensional conductive network structure used in industrial application range. ADVANTAGE - The electromagnetic shielding natural rubber effectively constructs three-dimensional conductive network structure in the natural rubber matrix, so as to effectively improve the conductive and electromagnetic shielding performance of natural rubber composite material, at the same time, keeping the material good mechanical property. The preparation technique is simple, without any strict requirement, the device also is common device, easy to implement. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the preparation method of electromagnetic shielding natural rubber for effectively constructing three-dimensional conductive network structure comprising: (1) preparation of polydopamine-coated foam template: firstly pre-processing the foam template, then dipping the processed foam template in the dopamine aqueous solution for reaction; after finishing reaction, washing and drying to obtain the composite foam coated with poly-dopamine on the surface; (2) preparation of graphene oxide aqueous dispersion: adding the deionized water into the graphene oxide slurry, ultrasonically and mechanically stirring, preparing to obtain the graphene oxide aqueous dispersion; (3) preparing three-dimensional reduction graphene oxide composite filler: dipping the foam template coated with poly-dopamine on the surface prepared in the step (1) into the graphene oxide water dispersion prepared in step (2), stirring to make the graphene oxide adhered to the surface of the foam template framework, washing, freezing and drying to obtain composite foam loaded with graphene oxide, processing the composite foam under the protection atmosphere at high temperature, carbonizing the foam template, the graphene oxide is successfully reduced to obtain the three-dimensional reduced graphene oxide composite filler; (4) preparing electromagnetic shielding natural rubber composite material: adding the rubber auxiliary agent into the natural latex, continuously stirring to mix uniformly, and backfilling the prepared natural rubber mixed emulsion to the three-dimensional reduced graphene oxide composite filler prepared in the step (3) by means of vacuum impregnation, then performing vacuum curing, vulcanizing to obtain the high electromagnetic shielding natural rubber composite material.