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Wave-absorbing composite material and preparation method thereof

A technology of composite materials and wave absorbing agents, applied in the field of wave absorbing materials, can solve the problems of uneven dispersion, affecting the wave absorbing properties of materials, and agglomeration of wave absorbing agents, so as to achieve excellent overall performance, increase effective load, and high thermal stability. Effect

Pending Publication Date: 2021-10-22
NANJING FIBERGLASS RES & DESIGN INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the absorbing agent is coated on the surface of the fabric, so that the absorbing agent remains on the surface of the fabric, and there are problems such as agglomeration and uneven dispersion of the absorbing agent, which affects the absorbing performance of the material.

Method used

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  • Wave-absorbing composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a lightweight sandwich-structured wave-absorbing composite material is composed of a wave-transmitting layer 3 , a wave-absorbing layer 2 and a reflective layer 1 .

[0033] The fiber reinforced material of the wave-transmitting layer is glass fiber cloth, and the wave-absorbing layer is composed of three layers of wave-absorbing hollow fabric composite materials. The wave absorbing agent in each layer of the wave-absorbing hollow fabric composite material in the three-layer wave-absorbing hollow fabric composite material is a magnetic loss type and is ferrite. Each layer of wave-absorbing hollow fabric composite material consists of three parts: wave-absorbing agent, hollow fabric, and resin matrix.

[0034] The resin matrix can be epoxy resin. The resin content of the hollow fabric composite is 50%.

[0035] The sandwich structure of the hollow fabric is "8" type, and the height of the hollow fabric is 25mm. The surface density of the ho...

Embodiment 2

[0037] A lightweight sandwich-structured wave-absorbing composite material in this embodiment is composed of a wave-transmitting layer 3 , a wave-absorbing layer 2 and a reflective layer 1 . The fiber reinforced material of the wave-transparent layer is hollow fabric, quartz fiber cloth, aramid fiber cloth, chopped strand mat and other fabrics.

[0038] The wave-absorbing layer 2 is composed of two layers of wave-absorbing hollow fabric composite materials. The two-layer wave-absorbing hollow fabric composite material can be composed of one or more kinds of magnetic loss type wave-absorbing hollow fabric composite materials or electric loss type wave-absorbing hollow fabric composite materials. The wave-absorbing hollow fabric interlayer composite material consists of three parts: wave absorbing agent, hollow fabric and resin matrix.

[0039] The wave absorber is at least one of electric loss and magnetic loss wave absorbers. The electric loss absorber can be silicon carbide...

Embodiment 3

[0044] This example proposes a method for preparing a lightweight sandwich-structured wave-absorbing composite material, which includes the following steps:

[0045] (1) Material preparation: Prepare raw materials such as hollow fabrics, fiber cloths, resins, and wave absorbers of different specifications;

[0046] (2) Wave-absorbing resin configuration: Disperse and mix the electric loss or magnetic loss type wave absorbing agent into the resin according to a certain proportion and stir evenly;

[0047] (3) Preparation of single-layer wave-absorbing hollow composite material: Lay fiber cloth and hollow fabric in turn on the surface of the mold, and use vacuum infusion molding process to compound wave-absorbing resin and fabric into electric loss or magnetic loss type wave-absorbing hollow fabric composites;

[0048] (4) Preparation of lightweight sandwich-structured wave-absorbing composite material: Lay the reflective layer, wave-absorbing layer, and transparent thin layer ...

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Abstract

The invention discloses a wave-absorbing composite material and a preparation method thereof. The wave-absorbing composite material comprises a wave-transparent layer, a reflecting layer and a wave-absorbing layer arranged between the wave-transparent layer and the reflecting layer, wherein the wave-absorbing layer comprises multiple layers of wave-absorbing hollow fabric composite materials which are sequentially stacked, and each layer of wave-absorbing hollow fabric composite material comprises a hollow fabric and a resin which is filled on the fiber surface of the hollow fabric and is dispersed with a wave-absorbing agent. According to the invention, a wave-absorbing agent is dissolved in a resin, and the wave-absorbing resin is added to the fibers of a hollow fabric, so that the wave-absorbing agent of the prepared multi-layer wave-absorbing hollow fabric composite material is uniformly dispersed, the wave-absorbing composite material is excellent in overall performance, does not have interfacial properties, and has excellent properties of light weight, high strength, layering resistance and impact resistance, and different wave-absorbing paving layer structures can be designed according to the requirements of the electrical property and the mechanical property so as to achieve the compatibility of the electrical property and the mechanical property and meet the feasibility of a forming process.

Description

technical field [0001] The invention belongs to the field of wave-absorbing materials, and in particular relates to a wave-absorbing composite material and a preparation method thereof. Background technique [0002] The absorbing material refers to the ability to absorb and attenuate the incident electromagnetic wave, so that the electromagnetic energy can be converted into heat energy and dissipated, or the electromagnetic wave can avoid the reflection of the electromagnetic wave or pass through the material through the interference effect. The development of light-weight and high-strength absorbing materials is of great significance in the fields of stealth and electromagnetic compatibility. [0003] To improve the efficiency of microwave absorbing materials, microwave absorbing materials that can produce multiple loss mechanisms should be constructed, allowing as much electromagnetic waves as possible to enter the interior of the material for attenuation, so as to achieve...

Claims

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Application Information

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IPC IPC(8): B32B17/02B32B17/12B32B33/00B32B5/02B32B5/26B32B9/00B32B9/04B32B27/02B32B27/34B32B27/12B32B37/06B32B37/10B32B38/00H01Q17/00H05K9/00
CPCB32B5/02B32B5/26B32B33/00B32B37/06B32B37/10B32B38/00H05K9/0088H01Q17/008B32B2262/101B32B2262/0269B32B2307/308B32B2307/558B32B2307/718
Inventor 赵大娟王晓文周正亮魏雅斐赵忠博
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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