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A kind of preparation method of electromagnetic protection composite material

A composite material and electromagnetic protection technology, which is applied in the field of composite electromagnetic protection structural materials and its preparation, can solve the problems of poor protection performance in low frequency bands, poor mechanical properties, and low shielding efficiency, and achieve good dual performance of electrical conductivity and magnetic conductivity, mechanical properties, etc. The effect of improved performance and broad application prospects

Active Publication Date: 2017-03-29
NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using modified fibers with good conductivity as fillers to prepare structural protective materials is an important research direction for electromagnetic protective materials at present, but its defects mainly include: 1) Due to poor magnetic permeability, the material is greatly reduced Absorption loss, the protection bandwidth is relatively narrow, and the screen effect is relatively low. Although it has good protection performance in the high frequency band (10MHz~1.5GHz), the protection performance in the low frequency band (0.1KHz~10MHz) is poor.
2) The mechanical properties are relatively poor, and the shielding effectiveness of carbon fiber filled composite materials with better mechanical properties is lower, while the metal materials with higher mechanical properties are too heavy

Method used

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  • A kind of preparation method of electromagnetic protection composite material
  • A kind of preparation method of electromagnetic protection composite material
  • A kind of preparation method of electromagnetic protection composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Using carbon fiber, quartz fiber and aramid fiber as raw materials, it is woven by orthogonal three-way weaving method figure 1 Braids of the structure shown. The carbon fiber is located in the X-axis direction of the spatial rectangular coordinate axis, the quartz fiber is located in the Y-axis direction of the spatial rectangular coordinate axis, and the angle between the two is 90°, and the aramid fiber is used as the binding yarn in the Z-axis direction. In the braided body, the mass percentage of carbon fiber is 40%, the mass percentage of quartz fiber is 55%, and the mass percentage of aramid fiber is 5%.

[0036] Soak the braided body in concentrated nitric acid for 5 hours, take it out, wash it with water until neutral, and dry it at 100°C.

[0037] Weigh 72g Ni(NO 3 ) 2 ·6H 2 O, 73g Co(NO 3 ) 2 ·6H 2 O, add 1L deionized water, sonicate to make it dissolve evenly, and prepare a 0.5mol / L nickel-cobalt catalyst aqueous solution.

[0038] Take the dried bra...

Embodiment 2

[0058] The carbon fiber, quartz fiber and aramid fiber are woven into a braided body by an orthogonal three-way weaving method, in which the carbon fiber is located in the X-axis direction of the spatial rectangular coordinate axis, the quartz fiber is located in the Y-axis direction, and forms an angle of 90° with the carbon fiber, and the aramid fiber The fibers act as binding yarns in the Z-axis direction. In the braided body, the mass percentage of carbon fiber is 50%, the mass percentage of quartz fiber is 45%, and the mass percentage of aramid fiber is 5%.

[0059] Weigh 97g Ni(NO 3 ) 2 ·6H 2 O, 98g Co(NO 3 ) 2 ·6H 2 O, 87g NiSO 4 ·6H 2 O was added to 1L of deionized water, sonicated to make it dissolve evenly, and prepared into a 1mol / L nickel-cobalt catalyst aqueous solution.

[0060] Immerse the braided body in concentrated nitric acid for 6 hours, take it out and wash it until neutral, dry it at 120°C, put it in the above catalyst solution and soak it for 6 h...

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Abstract

The invention discloses a preparation method of an electromagnetic protective composite material. The preparation method comprises the following steps: growing a carbon nano-tube array on the surface of a fabric body formed through the knitting of carbon fibers, quartz fibers and aramid fibers in an orthogonal three-way knitting method, activating through SnCl2-PdCl2, chemically plating nickel, and finally brushing a resin protective layer on the surface of the fabric body and hot-pressing and curing to obtain the electromagnetic protective composite material. The composite material has dual performances of conducting electricity and conducting magnetism, and has good mechanical property, is suitable for integrally forming, and can be used for electromagnetic protection of abnormal structural component without working allowance.

Description

technical field [0001] The invention relates to a composite electromagnetic protection structural material with dual properties of high electrical conductivity and high magnetic permeability and a preparation method thereof, belonging to the field of functional composite materials. Background technique [0002] The rapid development of electronic information technology and the wide application of electronic and electrical products have formed a complex electromagnetic environment. Especially as the power of electromagnetic radiators such as radar, communication, and navigation is increasing and the frequency is becoming wider and wider, equipment and personnel are facing serious electromagnetic threats. [0003] As the cornerstone of electromagnetic protection technology, electromagnetic protection materials play a vital role. Electromagnetic protection materials mainly include gap protection materials, visible materials, coating materials, structural materials, etc. Coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L77/10C08K13/06C08K9/06C08K9/02C08K7/24C08K7/06C08K7/10C08K5/14
Inventor 雷亿三张瑞刚王富强乔妙杰王庆国苏青林
Owner NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP