Preparation method of magnetic wave-absorbing resin

A magnetic wave-absorbing and resin-based technology, which is applied to the magnetism of organic materials/organic magnetic materials, magnetic field/electric field shielding, and electrical components, can solve problems such as narrow wave-absorbing frequency band, weak absorption strength, and poor low-frequency performance. Simple and feasible, low production cost, mature and stable process

Inactive Publication Date: 2020-02-21
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the existing wave-absorbing materials, the dielectric type wave-absorbing materials have the disadvantages of weak absorption strength and poor low-frequency performance; the magnetic-dielectric type wave-absorbing materials have the disadvantages of large specificity and narrow wave-absorbing frequency band, and cannot meet the needs of broadband and strong absorption. wave performance requirements

Method used

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  • Preparation method of magnetic wave-absorbing resin
  • Preparation method of magnetic wave-absorbing resin

Examples

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preparation example Construction

[0033] The invention provides a preparation method of magnetic wave-absorbing resin. The method provided by the present invention uses magnetic absorbent and graphene to modify the resin matrix, and the composite modified material composed of magnetic absorbent and graphene will form a conductive network inside the resin matrix, which enhances the electromagnetic loss of the wave-absorbing material , while reducing the density of the absorbing material, it improves its absorbing performance and broadens the absorbing bandwidth. In addition, the method provided by the invention is simple and feasible, the process is mature and stable, the production cost is low, and large-scale production is possible.

[0034] Specifically, the preparation method provided by the present invention includes the following steps: mixing and ball milling the magnetic absorber and graphene according to a mass ratio of (20-200):1 to obtain a composite modified material, and then combining the composit...

Embodiment 1

[0061] (1) Add 79g of carbonyl iron powder and 1g of single-layer graphene into the ball mill jar, then add 1200g of stainless steel balls and 160g of absolute ethanol, seal the ball mill jar and put it into a planetary ball mill with the speed set at 250 rpm / min, ball milling for 10 hours. After the ball mill tank is cooled, the obtained product is separated from the balls by sieving, put into a vacuum drying oven, and dried at 60° C. for 8 hours in a vacuum state to obtain a composite modified material.

[0062] (2) Put 13g of epoxy resin into a carrier cup, put it into an oven, and heat it at 70°C until the resin becomes thinner. Add 80g of the composite modified material prepared in step (1), and add 1g of curing agent. Put the carrier cup into the homogenizer, set the speed at 1500r / min, stir for 2 minutes until the mixture is uniform, and obtain a mixture of carbonyl iron powder / graphene sample and epoxy resin.

[0063] (3) Add the mixture prepared in step (2) into a ...

Embodiment 2

[0065] (1) Add 298g of carbonyl iron powder and 2g of single-layer graphene into the ball mill jar, then add 3000g of stainless steel balls and 300g of absolute ethanol, seal the ball mill jar and put it into a planetary ball mill, and set the speed at 500 rpm / min, ball milling for 12 hours. After the ball mill tank is cooled, the obtained product is separated from the balls by sieving, put into a vacuum drying oven, and dried at 60° C. for 8 hours in a vacuum state to obtain a composite modified material.

[0066] (2) Put 40g of epoxy resin into a carrier cup, put it into an oven, and heat it at 70°C until the resin becomes thinner. Add 160g of the composite modified material prepared in step (1), and add 2g of curing agent. Put the carrier cup into the homogenizer, set the speed at 1500r / min, stir for 2 minutes until the mixture is uniform, and obtain a mixture of carbonyl iron powder / graphene sample and epoxy resin.

[0067] (3) Add the mixture prepared in step (2) into ...

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Abstract

The invention relates to a preparation method of magnetic wave-absorbing resin. The preparation method comprises the following steps: mixing a magnetic absorbent and graphene according to a mass ratioof (20-200): 1, carrying out ball milling to prepare a composite modified material, mixing the composite modified material with resin and a resin curing agent, and carrying out curing to obtain the magnetic wave-absorbing resin. According to the preparation method, the magnetic absorbent and the graphene are compounded to form a conductive network in the magnetic wave-absorbing resin, so electromagnetic loss is enhanced, the density of the wave-absorbing resin is reduced, the wave-absorbing performance of the wave-absorbing resin is improved, and the wave-absorbing bandwidth of the wave-absorbing resin is broadened. The preparation method provided by the invention is simple and feasible in operation, mature and stable in process, low in production cost and capable of realizing large-scaleproduction.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to a preparation method of a magnetic wave-absorbing resin. Background technique [0002] With the rapid development of information technology, the impact of electromagnetic pollution on the environment is becoming increasingly serious. Electromagnetic radiation can interfere with the normal operation of precision instruments and electronic equipment, limit the complexity and miniaturization of modern electronic equipment, and even endanger human health. Therefore, the demand for electromagnetic pollution protection is becoming more and more urgent. On the other hand, with the continuous development of modern radio technology and the continuous improvement of radar detection methods, the battlefield survivability of weapons and equipment is greatly threatened. In order to improve the survival, penetration and deep strike capabilities of weapons and equipment on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K7/00C08K3/18C08K3/04C08K3/08C08K3/36C08K3/22C08L63/00H05K9/00H01F1/42
CPCC08K3/08C08K3/18C08K3/36C08K7/00C08K2003/0856C08K2003/2265C08K2201/011C08K3/042H01F1/42H05K9/0081C08L63/00
Inventor 刘甲卢明明宫元勋欧秋仁赵宏杰张天翔
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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