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Preparation method of electromagnetic shielding honeycomb core material

An electromagnetic shielding, honeycomb core material technology, applied in chemical instruments and methods, layered products, glass/slag layered products, etc., can solve the problems of coating peeling, affecting shielding effect, heavy weight, etc., to achieve light structure and function Quantification, maintaining good mechanical properties, and integrating structure and function

Active Publication Date: 2018-11-02
AVIC BASIC TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although metal materials have good electromagnetic shielding performance, they cannot meet the lightweight design requirements of current aircraft due to their heavy weight.
Shielding coating treatment on the surface of the material has the disadvantages of complicated procedures and coating peeling affecting the shielding effect
Although polymer materials have the characteristics of good mechanical properties and small weight, due to their high radio frequency impedance and poor electrical conductivity, they bring a lot of trouble to the electromagnetic compatibility design of aircraft.
The main method of new polymer electromagnetic shielding materials mainly includes adding conductive fillers or pre-embedded conductive media in the material matrix. Adding conductive fillers can effectively improve the electrical conductivity of polymer materials, so that they have electromagnetic shielding properties. Conductive fillers in the material system The uniform dispersion in the medium is time-consuming and labor-intensive, and as the amount of addition increases, the strength of the material decreases accordingly
The pre-embedded conductive medium has the disadvantage of complex process

Method used

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  • Preparation method of electromagnetic shielding honeycomb core material
  • Preparation method of electromagnetic shielding honeycomb core material
  • Preparation method of electromagnetic shielding honeycomb core material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of manufacture technology of graphene / ferrite electromagnetic shielding interlayer honeycomb core material, it is characterized in that, design and preparation step ( figure 1 , figure 2 )as follows:

[0034] (1) 0.5-5g graphene, 1000-2200g deionized water, 50-600g ferric chloride, 30-200g ferrous chloride, 10-100mL ammonia water;

[0035] Add the above mass parts of graphene into deionized water, and disperse for 0.5-5 hours at a temperature of 30-80°C using an ultrasonic disperser; add the above mass parts of ferric chloride and ferrous chloride into the graphene suspension , continue to stir in a water bath at 30-80°C for 10-60 minutes; then add 10-100g of the above-mentioned mass fraction of ammonia water, and continue to stir in a water bath for 10-60 minutes; use deionized water to repeatedly wash the graphene / ferrite particles until the graphene / The ferrite suspension is neutral.

[0036] (2) Using a magnet to separate the graphene / ferrite particles f...

Embodiment 2

[0041] A kind of manufacture technology of graphene / ferrite electromagnetic shielding interlayer honeycomb core material, it is characterized in that, design and preparation step ( figure 1 , figure 2 )as follows:

[0042] (1) 0.5-5g graphene, 1000-2200g deionized water, 50-600g ferric chloride, 30-200g ferrous chloride, 10-100mL ammonia water;

[0043] Add the above mass parts of graphene into deionized water, and disperse for 0.5-5 hours at a temperature of 30-80°C using an ultrasonic disperser; add the above mass parts of ferric chloride and ferrous chloride into the graphene suspension , continue to stir in a water bath at 30-80°C for 10-60 minutes; then add 10-100g of the above-mentioned mass fraction of ammonia water, and continue to stir in a water bath for 10-60 minutes; use deionized water to repeatedly wash the graphene / ferrite particles until the graphene / The ferrite suspension is neutral.

[0044] (2) Using a magnet to separate the graphene / ferrite particles f...

Embodiment 3

[0049] Similar to embodiment 1, a kind of manufacturing technology of graphene / ferrite electromagnetic shielding foam is characterized in that, design and preparation steps ( Figure 1-3 )as follows:

[0050] A kind of manufacture technology of graphene / ferrite electromagnetic shielding interlayer honeycomb core material, it is characterized in that, design and preparation step ( figure 1 , figure 2 )as follows:

[0051] (1) 0.5-5g graphene, 1000-2200g deionized water, 50-600g ferric chloride, 30-200g ferrous chloride, 10-100mL ammonia water;

[0052] Add the above mass parts of graphene into deionized water, and disperse for 0.5-5 hours at a temperature of 30-80°C using an ultrasonic disperser; add the above mass parts of ferric chloride and ferrous chloride into the graphene suspension , continue to stir in a water bath at 30-80°C for 10-60 minutes; then add 10-100g of the above-mentioned mass fraction of ammonia water, and continue to stir in a water bath for 10-60 minu...

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Abstract

The invention belongs to the technical field of composites and relates to a preparation method of an electromagnetic shielding honeycomb core material. According to the method, a graphene / ferrite hybrid material is prepared, then graphene / ferrite hybrid granules are uniformly attached to a fabric carrier through magnetic deposition, and graphene / ferrite hybrid granular electromagnetic shielding fabric is formed; an electromagnetic shielding interlayer is prepared from prepreg, adhesive films and the electromagnetic shielding fabric; finally, the electromagnetic shielding interlayer and a honeycomb core material are composited through adhesion to form a C-sandwich electromagnetic shielding honeycomb structure. According to the technical process, related mature technologies are integrated, and low-cost design and manufacture and technology-integrated comprehensive utilization of the electromagnetic shielding honeycomb core material are realized.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a preparation method of an electromagnetic shielding honeycomb core material. Background technique [0002] Nowadays, the number of radio signals is increasing day by day, the electromagnetic spectrum is becoming denser and denser, and the electromagnetic power density is increasing dramatically. Therefore, the application of shielding technology in various fields is becoming more and more important. The military aspect ranges from communication reconnaissance satellites to various unmanned reconnaissance aircraft to the control of precision guided weapons, and the civilian side ranges from micro communication tools to various data transmissions to satellite digital TV signals, etc. , the importance of shielding is even more prominent in the aviation field. In the harsh electromagnetic environment, radio frequency energy is very harmful, and the light ones will cause di...

Claims

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Application Information

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IPC IPC(8): B32B3/12B32B9/00B32B9/04B32B9/02B32B17/02B32B17/12B32B7/10B32B33/00
CPCB32B3/12B32B5/02B32B5/26B32B7/10B32B9/00B32B9/007B32B9/047B32B33/00B32B2260/023B32B2262/06B32B2262/101B32B2262/106B32B2307/212
Inventor 史湘宁纪双英郝巍许健翔刘杰
Owner AVIC BASIC TECH RES INST
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