▎ 摘　　要

NOVELTY - The light porous conductive silicone rubber nanocomposite has a matrix conductive functional framework and an external reinforcing coating skin layer. The conductive functional framework is a three-dimensional continuous porous aerogel network framework structure formed by mutually interweaving conductive nano materials. The external reinforced coating layer is a silicone rubber layer coated on the outer surface of the matrix conductive function skeleton structure. The composite material is a porous structure, and the porosity of the composite material is 1-95%. USE - Light porous conductive silicone rubber nano-composite useful in the field of electromagnetic interference shielding (claimed) such as military, aerospace, automobile industry, and electronic appliances. ADVANTAGE - The porosity of the composite material can be adjusted within a large range (1.0-95.0%), and controllable design and preparation of the internal porous structure of the nano composite material can be realized. The porous design of the nano composite material maintains the excellent mechanical properties (such as high compression pressure and cyclic compression stability) of the material, and simultaneously shows light weight (low density, less than 1.0 g/cm3. The composite material has the comprehensive characteristics of high conductivity and high electromagnetic shielding efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of light porous conductive silicone rubber nano composite material, which involves: preparing a three-dimensional continuous porous aerogel network framework structure by utilizing a conductive nano material and having one-dimensional nanowires or two-dimensional lamellae which are mutually interwoven; dipping the porous aerogel network skeleton structure into a polysiloxane solution, cooperatively adjusting the concentration, dipping time and dipping pressure of the polysiloxane solution in a dipping process, taking out and carrying out curing molding, uniformly coating a layer of silicon rubber layer on the outer surface of the one-dimensional nanowire or two-dimensional sheet layer, where the concentration of the polysiloxane solution is 0.1-98.0 wt%, the dipping time is 1-60 minutes, the dipping environment is normal pressure or vacuum environment, and the absolute pressure of the vacuum environment is 50-6000 Pa; or uniformly spraying polysiloxane solution into the porous aerogel network skeleton structure, and uniformly coating a layer of silicone rubber layer on the outer surface of the one-dimensional nanowire or the two-dimensional lamella after curing;