An explosion-proof broadband wave-absorbing composite material and its preparation method

A technology of composite materials and wave-absorbing materials, which is applied in the field of multi-functional materials, can solve the problems of not taking broadband wave-absorbing performance into account, having no explosion-proof performance, and being unable to realize explosion-proof and broadband wave-absorbing at the same time, and achieve excellent explosion-proof characteristics, dielectric The effect of low constants and overcoming technical obstacles that are difficult to combine

Active Publication Date: 2020-06-23
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing broadband absorbing composite materials basically have no explosion-proof performance, and professional explosion-proof materials do not take broadband absorbing performance into consideration, and these composite materials cannot simultaneously realize the dual functions of explosion-proof and broadband absorbing

Method used

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  • An explosion-proof broadband wave-absorbing composite material and its preparation method
  • An explosion-proof broadband wave-absorbing composite material and its preparation method
  • An explosion-proof broadband wave-absorbing composite material and its preparation method

Examples

Experimental program
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preparation example Construction

[0026] The preparation method of this explosion-proof broadband absorbing composite material includes:

[0027] Step S1: Use quartz fiber and unsaturated resin to prepare explosion-proof skin.

[0028] The explosion-proof skin is a surface layer of composite material, which has an explosion-proof function in structure and a transmission electromagnetic wave characteristic in terms of absorbing function.

[0029] At present, the most widely used explosion-proof materials are para-aramid fiber (P-ARF), ultra-high molecular weight polyethylene (UHMWPE), and high-strength quartz fiber. In addition, there are more expensive polyparaphenylene benzodi Oxazole (PBO) and pyridine aramid fiber (M-5) can only be used in special fields.

[0030] Explosion-proof skin preparation method: cut para-aramid fiber (P-ARF), high-strength quartz fiber and ultra-high molecular weight polyethylene according to specifications, paint unsaturated resin between the explosion-proof materials, and put it into a m...

Embodiment 1

[0054] This embodiment provides an explosion-proof broadband wave absorbing composite material, which is a layered structure and includes a reflective substrate, a broadband sandwich wave absorbing material, and an explosion-proof skin that are in contact in sequence.

[0055] The process of its preparation method is as figure 2 As shown, specifically including:

[0056] 1). Preparation of explosion-proof skin:

[0057] 2). Preparation of broadband sandwich absorbing materials:

[0058] a. Using chopped carbon fiber as a wave absorber, put the chopped carbon fiber into a crucible, put it into a high-temperature curing furnace, and heat it at 400°C for 4 hours. Take out the chopped carbon fiber and soak it in concentrated sulfuric acid for 1 hour, remove the concentrated sulfuric acid and wash it 3 times with acetone, and place the cleaned chopped carbon fiber on filter paper to dry naturally for 24 hours.

[0059] b. Prepare the tetrahydrofuran, acetone and epoxy adhesive film into a ...

Embodiment 2

[0067] This embodiment provides an explosion-proof broadband wave absorbing composite material, which is a layered structure and includes a reflective substrate, a broadband sandwich wave absorbing material, and an explosion-proof skin that are in contact in sequence.

[0068] The preparation method is basically the same as that of Example 1, except that:

[0069] 2). Preparation of broadband sandwich absorbing materials:

[0070] a. Using carbon nanotubes as a wave absorbing agent, put the carbon nanotubes into a crucible, put it into a high-temperature curing furnace, and heat at 500°C for 3 hours. The carbon nanotubes were taken out and soaked in concentrated sulfuric acid for 0.5 hours, the concentrated sulfuric acid was removed and washed with acetone 3 times, and the cleaned carbon nanotubes were placed on filter paper to dry naturally for 24 hours.

[0071] b. Prepare the tetrahydrofuran, acetone and epoxy adhesive film into a glue solution according to a mass ratio of 1.2:1.2:...

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Abstract

The invention provides an explosion-proof broadband wave absorption composite material and a preparation method thereof, and belongs to the technical field of multifunctional materials. The preparation method of the explosion-proof broadband wave absorption composite material comprises the following steps: preparing explosion-proof skin by utilizing quartz fiber and unsaturated resin, preparing anelectrical loss wave absorption piece, preparing a magnetic loss wave absorption piece, preparing a broadband interlayer wave absorption material, and sequentially adhering the broadband interlayer wave absorption material and the explosion-proof skin to a reflecting base plate. The explosion-proof broadband wave absorption composite material prepared by the invention is of a laminated structure,and comprises the reflecting base plate, the broadband interlayer wave absorption material and the explosion-proof skin which are in contact in sequence. According to the preparation method providedby the invention, the technical obstacle that a wave absorption material and an explosion-proof material are difficult in combination is overcome, and the preparation method is simple and is easy in industrial implementation; the prepared explosion-proof broadband wave absorption composite material simultaneously has an explosion-proof function and a broadband wave absorption function and has thecharacteristics of good low-frequency performance, broad absorption band, low surface density and excellent environment performance, the explosion-proof function of a product is solved, and the broadband wave absorption function is also integrated.

Description

Technical field [0001] The present invention relates to the technical field of multifunctional materials, in particular to an explosion-proof broadband wave-absorbing composite material and a preparation method thereof. Background technique [0002] As the demand for military and civilian electromagnetic wave absorbing materials grows, various electromagnetic wave absorbing materials are widely studied and used. Most of the current research and development of absorbing materials are considered from a single absorbing aspect, and other structural functions are less considered, which limits them. Application prospects in certain fields. [0003] The invention patent (201510607620.6) provides a honeycomb-shaped high-temperature-resistant wave-absorbing structure material. The method is composed of a silicon rubber material wave-absorbing layer, an aluminum alloy honeycomb structure layer and an isocyanate composite material layer. The aluminum alloy honeycomb structure layer has a fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/00B32B37/06B32B9/00B32B9/04B32B27/38B32B27/06B32B33/00B32B27/30B32B27/32B32B27/28B32B27/08C08J9/36C09D163/00C09D7/61C08L33/24C08L27/06C08L23/12
CPCB32B5/02B32B27/06B32B27/08B32B27/281B32B27/304B32B27/32B32B27/38B32B33/00B32B37/0038B32B37/06B32B2255/02B32B2255/20B32B2255/205B32B2255/26C08J9/365C08J2323/12C08J2327/06C08J2333/24C08J2463/00C09D163/00
Inventor 谢云王绪超
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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