▎ 摘　　要

NOVELTY - High-strength and high-conductivity layered silicone rubber composite material comprises carbon cloth/silicon rubber conductive layer A, silver-plated copper powder/silicon rubber conductive layer B and nickel nanowires/graphene/silicon rubber NiNWs/rGO/MVQ tensile layer C, alternately layered according to ABC to form multi-layer ABC layered structure, after hot pressing and vulcanization, layered silicone rubber composite material is obtained. The surface volume resistivity is as low as 0.01 Omega.cm. The tensile strength reaches 4.12 megapascal. The right-angle tear strength reaches more than 12.9 N/mm, and X-band electromagnetic shielding efficiency reaches more than 50 dB. USE - High-strength and high-conductivity layered silicone rubber composite material used in electronic devices and aircraft as electromagnetic shielding sealing materials. ADVANTAGE - The high-strength and high-conductivity layered silicone rubber composite material is simple, has low cost, good mechanical properties, electromagnetic shielding efficiency, high electrical conductivity and high strength requirements. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing high-strength and high-conductivity layered silicone rubber composite material, which involves: a. dissolving silicone rubber in cyclohexane CYH, soaking carbon cloth CC in solution, and placing in fume hood for 24-48 hours to completely evaporate solvent to obtain carbon cloth/silicone rubber CC/MVQ conductive layer A; b. adding silver-coated copper powder and silicone rubber into Hack mixer, mixing at speed of 30-50 revolutions/minute for 15-30 minutes, using two rolls after kneading in rubber mixer, passing out thin sheets to obtain silver-plated copper powder/silicon rubber Cu@Ag/MVQ conductive layer C; c. dissolving silicone rubber in cyclohexane CYH, adding NiNWs and rGO fillers, placing in cell crusher for 1 hour, pouring solution onto surface freeze-drying in dish to obtain nickel nanowire/graphene/silicon rubber (NiNWs/rGO/MVQ) support layer B; d. using carbon cloth/silicon rubber conductive layer A, silver-plated copper powder/silicon rubber conductive layer B, and nickel nanowires/graphene/silicon rubber NiNWs/rGO/MVQ tensile layer C, alternately layering according to ABC to form multi-layer ABC multi-layer structure, using flat vulcanizer to perform hot-press vulcanization to obtain rubber sheet, vulcanization temperature is set to 160-180degrees Celsius, pressure is 30-20 megapascal, and time is 10-15 minutes; and e. taking out hot-pressed rubber sheet, and completing two-stage vulcanization by step heating in tube furnace under protection of N2 atmosphere to obtain high-strength and high-conductivity layered silicone rubber composite material.