Resin column reinforced broadband wave-absorbing/bearing composite material and preparation method thereof

A technology of composite materials and resin columns, applied in the field of wave-absorbing materials, can solve the problems of narrow wave-absorbing frequency band, loss of functionality, loss of usability, etc., and achieve the effects of improved shear performance, improved interlayer performance, and high production efficiency

Inactive Publication Date: 2020-03-27
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) Existing absorbing/carrying composite materials have poor electrical performance stability and narrow absorbing frequency band
[0009] (2) The overall interlaminar shear performance of the existing wave-absorbing composite material is insufficient
[0010] (3) At present, there is no preparation method for broadband absorbing composite materials that can take into account both electrical stability and interlayer performance
[0014] The stability of electrical properties and interlayer performance are the basic properties of wave-absorbing/carrying composite materials. If the electrical pr

Method used

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  • Resin column reinforced broadband wave-absorbing/bearing composite material and preparation method thereof
  • Resin column reinforced broadband wave-absorbing/bearing composite material and preparation method thereof
  • Resin column reinforced broadband wave-absorbing/bearing composite material and preparation method thereof

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preparation example Construction

[0054] In order to solve the above problems, the present invention provides a resin column-reinforced broadband wave-absorbing / carrying composite material and a preparation method thereof.

[0055] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0056] like figure 1 ((a), front view; (b), top view), the resin column reinforced broadband absorbing / carrying composite material provided by the embodiment of the present invention is wave-transparent layer 1, impedance matching layer 2, absorbing layer from top to bottom wave layer 3 and reflective layer 4.

[0057] After the wave-transparent layer 1 , impedance matching layer 2 , wave-absorbing layer 3 and reflective layer 4 are perforated, the resin columns 5 formed by permeating the resin in the holes are solidified and formed into an integrated laminated structure.

[0058] The wave-transparent layer is composed of fiber-reinforced resin-based composite material.

[005...

Embodiment 1

[0075] like figure 2 As shown, the preparation method of the resin column reinforced broadband wave-absorbing / carrying composite material provided in the embodiment of the present invention specifically includes:

[0076] S101. According to the performance requirements of the resin column reinforced broadband wave-absorbing / load-bearing composite materials, the fiber cloth for the wave-transmitting layer, the fiber-reinforced resin-based composite material for the impedance matching layer, the fiber-reinforced resin-based composite material for the wave-absorbing layer and the reflection The layers are stacked with carbon fiber cloth according to the designed structure.

[0077] S102 , fixing the surrounding layers of the stack in step S101 and drilling through holes, the diameter of the through holes is 1 mm to 3 mm, and the hole distance is 4 mm to 20 mm to form a resin flow channel.

[0078] S103, using composite resin film infiltration process, vacuum assisted resin infi...

Embodiment 2

[0081] The preparation method of the resin column-enhanced broadband wave-absorbing / carrying composite material provided in the embodiment of the present invention includes:

[0082] 1) Structural design of the absorbing structural plate:

[0083] According to the performance requirements of the absorbing structural plate, the total thickness of the designed structural absorbing material is 5mm, of which the thickness of the wave-transmitting layer is 1mm, the thickness of the impedance matching layer is 0.5mm, the thickness of the absorbing layer is 3mm, and the thickness of the reflective layer The thickness is 0.5mm. The base material used in the wave-transmitting layer is quartz fiber cloth; the base material used in the impedance matching layer is a low-dielectric glass fiber reinforced composite material sprayed with a blend of 20 parts by mass of conductive carbon black and 80 parts by mass of polyurethane resin ; The substrates used in the wave-absorbing layer are res...

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Abstract

The invention belongs to the technical field of wave-absorbing materials and discloses a resin column reinforced broadband wave-absorbing/bearing composite material and a preparation method thereof. The preparation method comprises the steps of sequentially stacking an impedance matching layer playing a role in impedance gradual change, a wave-absorbing layer containing an absorbent and a reflecting layer are on a lower portion of a wave-transmitting layer to form a laminated structure, and punching through holes in the formed laminated structure, enabling resin to flow into the through holesby adopting a wet forming process, and forming resin column structures penetrating through the whole laminated structure at the positions of the through holes. According to the invention, the throughholes are punched in advance in the thickness direction of a multi-layer structure prefabricated body, the process characteristics of wet molding of the composite material are used, the resin is poured into the through holes in the prefabricated body filling process to form Z-direction resin column structures, the effect of enhancing the interlayer performance is achieved, the forming process is simple, the mechanical property is excellent, the interlayer performance is greatly enhanced through the resin column structures formed at the through holes, and the defect that a current wave-absorbing composite material wave-absorbing layer is easily layered can be effectively overcome.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a resin column-reinforced broadband wave-absorbing / carrying composite material and a preparation method thereof. Background technique [0002] Electromagnetic wave absorber is a functional composite material that can effectively absorb incident electromagnetic waves and significantly reduce echo intensity. It has important applications in the fields of military stealth, civilian electromagnetic protection and anti-electromagnetic interference. Structural wave-absorbing composite materials use fiber reinforcements for integrated design of wave-absorbing performance and mechanical properties, so as to have dual functions of wave-absorbing and load-carrying, which can avoid the coating-type wave-absorbing material from falling off easily, weather resistance, etc. It has become an important direction in the research field of absorbing materials. [0003]...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B5/02B32B5/26B32B17/02B32B17/10B32B17/12B32B27/34B32B27/02B32B27/12B32B3/08B32B33/00B32B38/04B32B38/00
CPCB32B3/08B32B5/02B32B5/26B32B33/00B32B38/00B32B38/04B32B2250/04B32B2250/20B32B2255/02B32B2255/20B32B2255/205B32B2255/26B32B2262/0269B32B2262/10B32B2262/101B32B2262/106B32B2307/212
Inventor 邹如荣王立阮东升危伟李雷雷尹生
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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