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A kind of preparation method of honeycomb sandwich composite material

A composite material and honeycomb core technology, which is applied in the field of preparation of honeycomb sandwich composite materials, can solve the problems of poor electromagnetic wave absorption effect, etc., and achieve the effect of enhancing the absorption effect and improving the absorption wave bandwidth.

Active Publication Date: 2022-06-14
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the absorption bandwidth and the absorption effect of electromagnetic waves are not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of a honeycomb sandwich composite material, comprising the following steps:

[0034] a, the nano-graphene wave-absorbing material, dispersant, acetone diluent and bismaleimide resin are prepared into a uniform dipping solution one;

[0035] b. Slowly pour the immersion liquid containing the wave absorber into the immersion tank, cut the honeycomb core with a rectangular section, put the rectangular section honeycomb core in the immersion tank and fully immerse it. After drying at room temperature, after pre-curing, Finally, curing and molding are carried out, so that the surface of the rectangular-section honeycomb core is wrapped with a resin coating containing a graphene absorber;

[0036] c. The nano-ferrite absorbing material, dispersant, acetone diluent and bismaleimide resin are prepared into a uniform dipping solution II;

[0037] d. Slowly pour the immersion liquid 2 containing the wave absorber into the dipping tank, and obtain the trapezo...

Embodiment 2

[0042] A preparation method of a honeycomb sandwich composite material, comprising the following steps:

[0043] a, the nano-graphene wave-absorbing material, dispersant, acetone diluent and bismaleimide resin are prepared into a uniform dipping solution one;

[0044] b. Slowly pour the immersion liquid containing the wave absorber into the dipping tank, obtain a rectangular section honeycomb core 1 by cutting, and place the rectangular section honeycomb core 1 in the dipping tank to fully immerse it. After drying at room temperature, after pre-curing, Finally, curing and molding are carried out, so that the surface of the rectangular-section honeycomb core is wrapped with a resin coating containing a graphene absorber;

[0045] c. The nano-ferrite absorbing material, dispersant, acetone diluent and bismaleimide resin are prepared into a uniform dipping solution II;

[0046] d. Slowly pour the immersion liquid 2 containing the wave absorber into the dipping tank, and obtain t...

Embodiment 3

[0051] A preparation method of a honeycomb sandwich composite material, comprising the following steps:

[0052] a, the nano-graphene wave-absorbing material, dispersant, acetone diluent and bismaleimide resin are prepared into a uniform dipping solution one;

[0053] b. Slowly pour the immersion liquid containing the wave absorber into the dipping tank, obtain a rectangular section honeycomb core 1 by cutting, and place the rectangular section honeycomb core 1 in the dipping tank to fully immerse it. After drying at room temperature, after pre-curing, Finally, curing and molding are carried out, so that the surface of the rectangular-section honeycomb core is wrapped with a resin coating containing a graphene absorber;

[0054] c. The nano-ferrite absorbing material, dispersant, acetone diluent and bismaleimide resin are prepared into a uniform dipping solution II;

[0055] d. Slowly pour the immersion liquid 2 containing the wave absorber into the dipping tank, and obtain t...

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PUM

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Abstract

The invention discloses a preparation method of a honeycomb sandwich composite material, which belongs to the technical field of aerospace material preparation, and is characterized in that it comprises the following steps: a. preparing an impregnating solution; b. placing a rectangular cross-section honeycomb core in an impregnating tank c. Prepare impregnating solution 2; d. Put trapezoidal cross-section honeycomb core 2 in the dipping tank and fully impregnate; e. Use adhesive film to bond rectangular cross-section honeycomb core 1 and trapezoidal cross-section honeycomb core 2 together to obtain Composite honeycomb core; f, bonding the upper panel on the upper surface of the composite honeycomb core, bonding the lower panel on the lower surface of the composite honeycomb core, and finally solidifying and cooling to room temperature to obtain a honeycomb sandwich composite material. The invention obtains two types of honeycomb cores containing different absorber coatings by wet impregnation, and obtains a composite honeycomb sandwich structure through reasonable design, and then glues and solidifies it with the panel, which can effectively improve the wave absorption of the entire honeycomb sandwich composite material Bandwidth, enhance the absorption effect of electromagnetic waves.

Description

technical field [0001] The invention relates to the technical field of aerospace material preparation, in particular to a preparation method of a honeycomb sandwich composite material. Background technique [0002] The development of modern military reconnaissance technology has put forward higher requirements for the stealth performance of aircraft. Therefore, vigorously developing lightweight and broadband radar stealth absorbing materials has become an important issue in aerospace manufacturing technology. [0003] The basic working principle of radar stealth absorbing materials is to confine the incident electromagnetic wave inside the material through the electromagnetic parameter adjustment design of the material, and convert the electromagnetic energy into heat energy through various loss mechanisms and lose it. Absorbers for aerospace can usually be divided into coating materials and structural materials. Among them, the honeycomb core structure has become an importa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/12B32B7/12B32B9/00B32B9/04B32B27/04B32B27/18B32B27/28B32B33/00B32B38/08B32B37/12B32B38/00B32B37/14
CPCB32B3/12B32B7/12B32B5/02B32B27/281B32B33/00B32B38/08B32B37/12B32B38/00B32B37/146B32B2260/046B32B2038/0076B32B2262/10B32B2307/212
Inventor 邬作强张冕程勇杨永忠文友谊
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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