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Novel honeycomb structure wave-absorbing material and preparation method thereof

A honeycomb structure and wave-absorbing material technology, applied in the field of wave-absorbing materials, can solve problems such as unstable product consistency, difficult process control, and additional honeycomb load, and achieve excellent broadband wave-absorbing performance, poor product uniformity, Reduce the effect of surface reflections

Active Publication Date: 2020-12-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current honeycomb absorbing materials are obtained by impregnating the absorbing agent on the basis of ordinary aramid honeycomb, which will increase the extra load of the honeycomb, and the process is difficult to control, making the consistency of the product unstable

Method used

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  • Novel honeycomb structure wave-absorbing material and preparation method thereof
  • Novel honeycomb structure wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) First soak 10 aramid fibers in a mixed solution of 10g / L potassium permanganate and 20mL / L sulfuric acid for 1 minute, then soak them in 10g / L oxalic acid solution for 1 minute, and then put the fibers into the sensitized Liquid (10g / L SnCl 2 ; Soak in 40ml / L HCl (38%) at 40°C for 5 minutes, then in activation solution (1.5g / L PdCl 2 ; Activation treatment in 20ml / L HCl (38%) for 5 minutes.

[0024] Disperse the sensitized and activated fibers in the electroless plating solution for nickel plating, adjust the pH to 9 with 1mol / L sodium hydroxide, and plate the metal layer at a temperature of 65°C for 30 minutes, then take out the fibers and place them in a vacuum Dry in an oven at 70°C for 2 hours, and the plating solution is composed of: 15g potassium sodium tartrate, 8g (NH 4 ) 2 SO 4 , 6.7g NiSO 4 ·6H 2 O and 5g of sodium hypophosphite were dissolved in 200ml of distilled water.

[0025] (2) Crushing the metallized aramid fibers into chopped fibers with a ...

Embodiment 2

[0027] (1) In embodiment 2, a double-layer metal is plated on the aramid fiber, and then it is applied to the wave-absorbing honeycomb. The activation and sensitization step of the fiber is the same as in Example 1, and the plating process is as follows:

[0028] Disperse 100g of sensitized and activated fibers in the chemical plating solution to plate the first layer of nickel, adjust the pH to 9 with 1mol / L sodium hydroxide, and plate the metal layer at a temperature of 65°C for 20 minutes. Take out the fiber, and the plating solution is composed of: 10gNiSO 4 ·6H 2 O, 5g potassium sodium tartrate, 5g sodium citrate, 4g boric acid, 8g (NH 4 ) 2 SO 4 and 2g of sodium hypophosphite were dissolved in 200ml of distilled water.

[0029] Put the aramid fiber coated with metal nickel into the plating solution again to plate the second layer of metal copper, adjust the pH to 9 with 1mol / L sodium hydroxide, and plate the metal layer at a temperature of 65°C for 5 Minutes later,...

Embodiment 3

[0032] (1) In embodiment 3, a double-layer metal is plated on the aramid fiber, and then it is applied to the wave-absorbing honeycomb. The activation and sensitization step of the fiber is the same as in Example 1, and the plating process is as follows:

[0033] Disperse 40g of sensitized and activated fibers in the chemical plating solution to plate the first layer of cobalt metal, adjust the pH to 9 with 1mol / L sodium hydroxide, and plate the metal layer at a temperature of 65°C for 30 minutes , take out the fiber, the bath composition is: 20gCoCl 2 , 10g sodium potassium tartrate, 8g sodium citrate, 2g boric acid and 8g sodium hypophosphite were dissolved in 200ml distilled water.

[0034] Put the aramid fiber coated with metal cobalt into the plating solution again to coat the second layer of metal nickel, adjust the pH to 9 with 1mol / L sodium hydroxide, and coat the metal layer at a temperature of 65°C for 10 Minutes later, the fibers were taken out and dried at 70°C f...

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Abstract

The invention discloses a novel honeycomb structure wave-absorbing material and a preparation method thereof. The novel honeycomb structure wave-absorbing material is prepared from aramid wave-absorbing paper by adopting a honeycomb preparation process; the aramid wave-absorbing paper is obtained by taking chopped magnetic aramid fibers as reinforcing fibers and phenolic resin as a binder througha papermaking process; and the chopped magnetic aramid fibers are obtained by chopping magnetic aramid fibers obtained after surface metallization treatment. According to the novel honeycomb structurewave-absorbing material, the aramid fiber is creatively prepared into the wave-absorbing aramid fiber through a surface metallization method, the wave-absorbing aramid fiber is chopped and then prepared into the wave-absorbing aramid paper, and finally the wave-absorbing honeycomb is obtained, so that excellent broadband wave-absorbing performance can be realized.

Description

technical field [0001] The invention relates to a wave-absorbing material, in particular to a novel honeycomb structure wave-absorbing material and a preparation method thereof. Background technique [0002] With the continuous progress of society, magnetoelectric materials have been greatly developed. The continuous upgrading of equipment based on this, such as radars for detection purposes and guided missiles for active tracking and strikes, has completely changed the modern battlefield. If there is no suitable stealth material, our aircraft and ships are equivalent to seeing everything in the eyes of the enemy. [0003] According to their molding process and bearing capacity, absorbing materials can be divided into two categories: coating absorbing materials and structural absorbing materials. Structural absorbing materials have the dual functions of carrying and reducing the radar reflection cross section. It can reduce the structural mass, increase the payload, greatl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B31D3/02D01F6/60
CPCB31D3/02D01F6/605
Inventor 李旺昌贾鑫车声雷应耀余靓乔梁郑精武
Owner ZHEJIANG UNIV OF TECH
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