A kind of carbon-based porous flexible composite wave absorbing material and preparation method thereof

A composite wave absorbing material and flexible technology, applied in the field of carbon-based porous flexible composite materials and their preparation, can solve the problems of inability to meet material performance requirements, complex process methods, low temperature resistance, etc., and achieve low cost and good repeatability. , the effect of easy operation

Active Publication Date: 2019-03-08
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of material absorbs waves with good uniformity, strong process controllability, stable material properties (especially electrical properties), and simple construction, but its ubiquitous material temperature resistance is generally lower than 100°C, and the selected absorbing Wave agent fillers are mostly metal powders, and the surface density is too high. At the same time, more complicated process methods and professional equipment are required. The cost is high, and it cannot meet the performance requirements of special equipment and specific use environments or scenarios.

Method used

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  • A kind of carbon-based porous flexible composite wave absorbing material and preparation method thereof
  • A kind of carbon-based porous flexible composite wave absorbing material and preparation method thereof
  • A kind of carbon-based porous flexible composite wave absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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 at room temperature on a double-roll mill, and add 30 parts of nano-zinc oxide and 1 part of diacrylate-1,6-hexyl during the mixing process 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 thin sheets with a thickness of 0.5 mm.

[0032] Step 3: Plastic-encapsulate the sheet containing the mold...

Embodiment 2

[0035] Step 1, adding stearic acid into ethanol to prepare a treatment solution with a mass concentration of 0.85%, adding 1 part of graphene and carbon black with a weight ratio of 1:1 to 50 parts of the treatment solution, at 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 thin sheets with a thickness of 1 mm.

[0037] Step 3: After plastic-sealing the thin sheet containing...

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, and then re-knead it again for 20 minutes, put the rubber compound that has been re-kneaded into a mold, and place it at 136kg. -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-s...

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Abstract

The invention discloses a carbon-based porous flexible composite wave-absorbing material and a preparation method thereof. The carbon-based porous flexible composite wave-absorbing material and the preparation method thereof are characterized in that pretreatment is conducted on one part of a carbon-based wave-absorbing agent, and then mixing molding is conducted on the treated carbon-based wave-absorbing agent, 0.2-0.4 part of a fluxing agent, 40-100 parts of silicone rubber, 10-30 parts of reinforcing agents, 0-5 parts of radiosensitizer and 0-3 parts of flame retardants; rubber materials molded through mixing are put into a mold, rolling is conducted on the rubber materials at 100-150 kg.cm<-2>, and a thin sheet with the thickness ranging from 0.5 mm to 5 mm is prepared; after plastic sealing is conducted on the thin sheet with the mold, the plastic-sealed thin sheet with the mold is put into a gamma-ray irradiation field or an electron beam accelerator to enable the total absorbed dose to be kept at 30-100 kGy, radiation crosslinking is conducted, after a plastic package and the mold are removed, edges are cut off, and the carbon-based porous flexible composite wave-absorbing material is obtained. According to the carbon-based porous flexible composite wave-absorbing material and the preparation method thereof, the technology is simple, complex chemical process control or professional auxiliary equipment is not needed, only simple equipment such as a double-roller mixing mill is needed, and the cost is lower; the prepared material is excellent in flexibility and wave-absorbing performance, the preparation process is easy and rapid to control, the repeatability is good, and energy conservation and environment protection are achieved.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials and composite materials, and in particular relates to a carbon-based porous flexible composite material with wave-absorbing performance and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, due to its ability to effectively absorb electromagnetic waves, wave-absorbing materials help to improve the survival and penetration of equipment systems and deep strike capabilities, eliminate / reduce electromagnetic interference between electronic equipment, and improve system performance. Electromagnetic compatibility is widely used in military and civilian fields such as various aircraft, weapons and equipment, electronic devices, and communications. [0003] Flexible absorbing materials belong to the category of composite materials. Because of their flexibility, they are different from the rigidity of conventional absor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/04C08K13/04C08K3/04C08K7/06C08K5/09C08K3/34C08K3/36C08K5/103C08K5/3492C08K3/24B29C35/08B29C43/24B29C43/36B29C43/58B29C71/04B29K105/04
Inventor 宋宏涛曾凡松傅依备黄玮李宗军李闯
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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