Lightweight honeycomb wave-absorbing material and preparation method thereof

A wave-absorbing material and honeycomb technology, which is applied in shielding materials, electrical components, magnetic field/electric field shielding, etc., can solve the problems of unfavorable camouflage materials such as lightweight requirements, difficulty in improving low-frequency performance, and complicated production processes, so as to facilitate popularization The effect of using, reducing quality and shortening production cycle

Pending Publication Date: 2021-01-22
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation methods of the above honeycomb absorbing materials will cause the material density to be too high, and the low-frequency performance is difficult to improve, which is not conducive to the current requirements of missile weapons for the lightweight camouflage materials. At the same time, there are complicated production processes, high costs and environmental pollution during the preparation process. Not enough

Method used

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  • Lightweight honeycomb wave-absorbing material and preparation method thereof
  • Lightweight honeycomb wave-absorbing material and preparation method thereof
  • Lightweight honeycomb wave-absorbing material and preparation method thereof

Examples

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preparation example Construction

[0044] According to the second aspect of the present invention, there is provided a method for preparing a lightweight cellular absorbing material, which is used to prepare the lightweight cellular absorbing material described in the first aspect, comprising the following steps:

[0045] Step 1, using a base material doped with carbon fibers to prepare a honeycomb core, and the honeycomb core is directly used or subjected to subsequent processing;

[0046] Step 2, shaping the honeycomb core dipping glue; the shaping glue includes but not limited to phenolic resin, epoxy resin, etc.;

[0047] Step 3, drying the honeycomb core after dipping and shaping to obtain the honeycomb wave-absorbing material.

Embodiment approach

[0048]In a preferred embodiment of the present invention, the preparation method also includes the following steps:

[0049] Step 4, performing a wave-absorbing performance test on the honeycomb wave-absorbing material obtained in step 1 or step 3, including any one or more of radar wave reflectivity test, transmittance test or electromagnetic parameter test;

[0050] Step 5: Stack the honeycomb cores in the T direction according to the difference in the honeycomb absorbing performance, and then perform multi-layer integral molding to obtain the honeycomb absorbing material.

[0051] In step 1 of the present invention, the substrate includes aramid paper or kraft paper, and the honeycomb core has an aperture side length of 1-10 mm, preferably 2-5 mm.

[0052] The doped carbon fiber is a chopped carbon fiber which is easy to disperse in water, the length of the carbon fiber is 1-10mm, and the mass of the carbon fiber accounts for 0.01%-15% of the total mass of the base material...

Embodiment 1

[0056] A honeycomb wave-absorbing material, the raw material of which is carbon fiber doped with aramid fiber, the prepared honeycomb core has an aperture side length of 2.7mm and a honeycomb core height of 15mm.

[0057] Obtained by the following preparation methods:

[0058] Step 1, using aramid paper doped with chopped carbon fibers to prepare a honeycomb core;

[0059] Step 2, the processed honeycomb core is impregnated with epoxy resin, and then placed for 24 hours;

[0060] In step 3, the honeycomb formed by impregnation is dried in an oven at 80° C. for 4 hours, and then naturally cooled to room temperature to obtain a carbon fiber-doped aramid paper honeycomb absorbing material.

[0061] The carbon fiber length and content (mass fraction) of aramid paper are as follows:

[0062] Carbon fiber length 2mm;

[0063] Carbon fiber content 1.8%.

[0064] The transmittance of aramid paper is measured as follows: the test frequency is 6.0~18.0GHz, the average transmittance:...

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Abstract

The invention provides a lightweight honeycomb wave-absorbing material and a preparation method thereof. The honeycomb wave-absorbing material is obtained by processing a base material doped with carbon fibers into a honeycomb core structure and then carrying out gum dipping molding, and the base material comprises aramid paper or kraft paper. The preparation method comprises the following steps of 1, preparing the honeycomb core by using a base material doped with carbon fibers, wherein the honeycomb core is directly used or subjected to subsequent processing, 2, carrying out gum dipping molding on the honeycomb core, and 3, drying the honeycomb core subjected to gum dipping molding to obtain the honeycomb wave-absorbing material. According to the honeycomb wave-absorbing material disclosed by the invention, paper containing carbon fibers is used as a raw material, and good wave-absorbing performance can be realized by preparing honeycombs; and the wave-absorbing material has the advantages of being excellent in wave-absorbing performance, good in environment resistance, light in weight, flexible, capable of being molded and the like, and can be used for stealth design of some equipment.

Description

technical field [0001] The invention belongs to the technical field of honeycomb material preparation and stealth materials, and in particular relates to a lightweight honeycomb wave-absorbing material and a preparation method thereof. Background technique [0002] The honeycomb absorbing material has the characteristics of small density, large absorption, broad absorption frequency band and strong designability of absorbing performance. At the same time, it has good mechanical properties. It can be used as a structural part to realize the integration of structural absorbing and meet the short construction period in engineering camouflage. , light weight, good camouflage effect requirements. [0003] Since the domestically produced honeycomb absorbing materials are all impregnated, the absorbing honeycomb core produced by each unit is to prepare the honeycomb core first, and then impregnate the absorbing coating on the surface of the honeycomb core to prepare the absorbing h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
CPCH05K9/009H05K9/0081H05K9/0069
Inventor 高于马觅洋张西军高超贺晨王国栋游盾冯小云王秀兰曾一兵李颖王爱平
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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