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Double-layer skin wave-absorbing composite material sandwich structure and preparation method thereof

A technology of composite materials and sandwich structures, applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve problems such as difficulty in obtaining wave-absorbing effects

Active Publication Date: 2020-05-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Part of the equipment has high requirements on the mechanical properties of the skin, and it is inevitable to use a thicker skin. However, when the skin of the sandwich structure is thicker (greater than 0.2mm), no matter how the absorbing structure of the composite material is adjusted, the It is difficult to obtain satisfactory absorbing effect in the high frequency (Ka) band

Method used

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  • Double-layer skin wave-absorbing composite material sandwich structure and preparation method thereof
  • Double-layer skin wave-absorbing composite material sandwich structure and preparation method thereof
  • Double-layer skin wave-absorbing composite material sandwich structure and preparation method thereof

Examples

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Effect test

Embodiment 1

[0060] In the sandwich structure of double-skin absorbing composite materials provided in this embodiment, the first skin layer M 1 and the second skin layer M 2 The materials used are all glass fiber fabric reinforced resin composite materials with a thickness of 1mm; the wave-transmitting layer T 1 The selected material is polyurethane foam with a thickness of 0.5mm; the wave-transmitting layer T 2 There are four layers in total, all of which are made of polyurethane foam with a thickness of 3mm; the wave-absorbing layer X has four layers in total, all of which are made of epoxy adhesive mixed with carbon black wave-absorbing composite materials, along the direction of electromagnetic wave propagation, four layers The mass percentages of carbon black in the wave-absorbing layer X are 0.1%, 0.5%, 2%, and 6% respectively; the material selected for the reflective layer F is carbon fiber fabric reinforced resin composite material.

[0061] The preparation method of the present...

Embodiment 2

[0073] In the sandwich structure of double-skin absorbing composite materials provided in this embodiment, the first skin layer M 1 and the second skin layer M 2 The materials used are all quartz fiber fabric reinforced resin composite materials with a thickness of 0.6mm; the wave-transmitting layer T 1 The selected material is epoxy foam with a thickness of 0.5mm; the wave-transmitting layer T 2 There are four layers in total, all of which are made of epoxy foam with a thickness of 3mm; the wave-absorbing layer X has four layers, all of which are made of cyanate adhesive mixed with graphene wave-absorbing composite materials, along the direction of electromagnetic wave propagation , in the four absorbing layers X, the mass percentages of carbon black are 0.1%, 0.4%, 1.2%, and 2.2% respectively; the reflective layer F is made of carbon fiber fabric reinforced resin composite material.

[0074] The preparation method of the present embodiment comprises the following steps:

...

Embodiment 3

[0086] In the sandwich structure of double-skin absorbing composite materials provided in this embodiment, the first skin layer M 1 and the second skin layer M 2 The materials used are all aramid fiber fabric reinforced resin composite materials with a thickness of 0.3mm; the wave-transmitting layer T 1 The selected material is aramid paper honeycomb with a thickness of 0.5mm; the wave-transmitting layer T 2 There are six layers in total, and the materials selected are all aramid paper honeycombs with a thickness of 2mm; the wave-absorbing layer X has six layers in total, and the materials selected are Shuangma resin adhesive mixed with chopped carbon fiber wave-absorbing composite materials, along the electromagnetic wave In the direction of propagation, the mass percentages of chopped carbon fibers in the six absorbing layers X are 0.1%, 0.5%, 1.2%, 2%, 4%, and 6% respectively; the material selected for the reflective layer F is carbon fiber fabric reinforced resin composit...

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Abstract

The invention provides a double-layer skin wave-absorbing composite material sandwich structure and a preparation method thereof. The double-layer skin wave-absorbing composite material comprises a first skin layer M1, a wave-transmitting layer T1, a second skin layer M2, a plurality of wave-transmitting layers T2, a plurality of wave-absorbing layers X and a reflecting layer F in the form of M1-T1-M2-T2-X-T2-X-T2... X-T2-F in the propagation direction of electromagnetic waves, wherein the thickness of the first skin layer M1 and the thickness of the second skin layer M2 range from 0.2 mm to 1mm, and the thickness of the wave-transmitting layer T1 ranges from 0.5 mm to 1.5 mm. Through the double-layer skin design, the wave absorbing performance of the high-frequency (Ka) waveband of the wave-absorbing composite material sandwich structure can be greatly improved, and the defect that when the skin is thick (larger than 0.2 mm), the wave absorbing foam sandwich structure is difficult toobtain a satisfactory wave absorbing effect in the high-frequency (Ka) waveband is overcome.

Description

technical field [0001] The invention relates to a sandwich structure of a double-layer skin wave-absorbing foam wave-absorbing composite material and a preparation method thereof, belonging to the technical field of functional materials. Background technique [0002] With the development of radar detection and guidance technology, the main detection bands of enemy radars continue to expand to high-frequency bands, and weapons and equipment have an urgent need for materials with high-frequency (Ka) band electromagnetic wave absorption functions. [0003] The sandwich structure of lightweight absorbing composite materials has a wide range of application backgrounds in weapons and equipment, and has excellent broadband absorbing performance. Part of the equipment has high requirements on the mechanical properties of the skin, and it is inevitable to use a thicker skin. However, when the skin of the sandwich structure is thicker (greater than 0.2mm), no matter how the absorbing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/04B32B3/12B32B27/06B32B27/10B32B29/00B32B27/40B32B27/38B32B27/18B32B27/28B32B33/00B29C70/44B29C70/54
CPCB32B5/18B32B5/02B32B27/065B32B27/10B32B3/12B32B29/002B32B27/08B32B27/38B32B27/18B32B27/28B32B33/00B29C70/443B29C70/54B32B2262/101B32B2262/10B32B2262/0269B32B2266/0278B32B2266/0271B32B2266/0214B32B2262/106B32B2307/212
Inventor 邢孟达宫元勋马向雨吕通周勇卢明明刘甲刘绍堂朱伟杰闫丽生
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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