Carbon-based porous flexible composite wave-absorbing material and preparation method thereof
A composite wave-absorbing material and wave-absorbing material technology, applied in the field of wave-absorbing materials and composite materials, can solve the problems of inability to meet material performance requirements, complex process methods, low temperature resistance, etc., and achieve low cost, good repeatability, The effect of easy operation
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Embodiment 1
[0030] Step 1. Add the silane coupling agent KH550 into ethanol to prepare a treatment solution with a mass concentration of 0.8%. Add 1 part of graphene to 30 parts of the treatment solution, at 300r.min - 1 After stirring at the speed of 2 hours, suction filter to dryness, and dry the obtained solid at 80°C for 4 hours to obtain the treated carbon-based wave absorbing agent;
[0031] Step 2. Fill the treated graphene with 40 parts of methyl vinyl silicone rubber on a double-roll mill at room temperature. During the mixing process, add 30 parts of nano-zinc oxide and 1 part of diacrylate-1,6-hexyl Glycol ester, kneading for 15 minutes; static storage for 30 hours after kneading, and then re-smelting for 20 minutes, put the rubber compound that has been re-kneaded into a mold, and place it at 140kg.cm -2 Calendering was carried out under a certain pressure to prepare a thin sheet with a thickness of 0.5 mm.
[0032] Step 3: Plastic seal the sheet containing the mold and plac...
Embodiment 2
[0035] Step 1, adding stearic acid in ethanol to be mixed with the treatment solution that mass concentration is 0.85%, 1 part by weight ratio is that graphene and carbon black of 1:1 are joined in 50 parts of treatment solution, with 300r.min - 1 After stirring at a speed of 4 hours, suction filter to dryness, and dry the obtained solid at 70°C for 8 hours to obtain the treated carbon-based wave absorbing agent;
[0036] Step 2. Fill the treated graphene and carbon black with 100 parts of liquid dimethyl silicone rubber at room temperature on a double-roll mill, and add 25 parts of white carbon black and 4 parts of triallyl isocyanate during the mixing process. Cyanurate, kneading for 20 minutes; static storage for 20 hours after kneading, and then re-smelting for 10 minutes, put the re-kneaded rubber in the mold, -2 Calendering was carried out under a certain pressure to prepare a thin sheet with a thickness of 1 mm.
[0037] Step 3: After plastic-sealing the thin sheet co...
Embodiment 3
[0039] Step 1. Add silane coupling agent KH560 into ethanol to prepare a treatment solution with a mass concentration of 1%. Add 1 part of chopped fiber to 25 parts of the treatment solution, at 350r.min - 1 After stirring at a high speed for 3 hours, suction filter to dryness, and dry the obtained solid at 75°C for 6 hours to obtain the treated carbon-based wave absorbing agent;
[0040] Step 2. Fill the processed chopped fiber with 50 parts of liquid methylphenylvinyl silicone rubber at room temperature on a double-roll mill, and add 15 parts of rice husk superfine powder and 1 part of diacrylic acid during the mixing process -1,6-Hexanediol ester, kneading for 15 minutes; after kneading, store it for 25 hours, then re-knead it again for 20 minutes, put the rubber compound that has been re-kneaded into the mold, -2 Calendering was carried out under a certain pressure to prepare a thin sheet with a thickness of 5 mm.
[0041] Step 3: After plastic-sealing the thin sheet con...
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