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A kind of surface protective conductive composite material and preparation method thereof

A conductive composite material and composite material technology, applied in the field of surface protective conductive composite material and its preparation, can solve the problems of destroying the continuity of the circuit in the metal mesh, easy gaps on the surface, and damage to the composite material, so as to avoid secondary spraying Protective process, avoid thermal shock damage, and prolong service life

Active Publication Date: 2020-06-30
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-density metal materials are prone to corrosion when they are directly exposed to the environment, making the surface between the composite material and the composite material prone to gaps. When the lightning strike current passes through, arcs and sparks are generated. Explosive; therefore surface protection of conductive metallic materials is required
In addition, mesh foil-wrapped composite materials may be damaged during service due to hail, gravel flying from the airstrip, or tools accidentally dropped by maintenance personnel and rough trampling, etc., resulting in damage to the circuit in the metal mesh. Continuity, even internal composites can be damaged, affecting service performance

Method used

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  • A kind of surface protective conductive composite material and preparation method thereof
  • A kind of surface protective conductive composite material and preparation method thereof
  • A kind of surface protective conductive composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] See attached figure 1 As shown, the production of surface protective conductive composite flat plate: the length is 660mm±5mm, the width is 120mm±5mm, the thickness is 3.5mm±0.2mm, the steps are as follows:

[0041] (1) First lay the T700S / 5228 high-temperature epoxy resin-based composite material prepreg blank with a thickness of 3mm±0.2mm, the size is 670mm in length and 130mm in width, and then use a polymer conductive resin film with a thickness of 0.2mm±0.04mm as The conductive layer 2 is laid on the surface of one side of the prepreg, and then pre-cured at 150°C for 30 minutes to obtain a conductive composite material prefabricated part;

[0042] (2) Cut the size of the prefabricated part 1 to be 660mm in length and 120mm in width, polish the surface of one side of the prefabricated part covered with a conductive layer, clean it with acetone, and then evenly spray the polymer adhesive glue on the surface as the adhesive layer 3 , the adhesive thickness is 0.02mm~...

Embodiment 2

[0046] See attached figure 2 As shown, the production of surface protective conductive composite material curved panels: the length is 660mm±2mm, the width is 120mm±2mm, and the thickness is 4.5mm±0.2mm. The steps are as follows:

[0047](1) First lay the SW280 / benzoxazine resin pre-impregnated fabric blank with a thickness of 3mm±0.2mm, the size is 670mm in length and 130mm in width, and then use a polymer conductive resin film with a thickness of 0.2mm±0.04mm as the conductive layer 2 Lay it on the surface of both sides of the prepreg, and then precure at 150°C for 30 minutes to obtain a conductive composite material prefabricated part;

[0048] (2) Cut the size of the preform 1 to be 660mm in length and 120mm in width, polish the surfaces on both sides of the preform, clean it with acetone, and then evenly spray polymer adhesive glue on the surface as the adhesive layer 3, and the thickness of the adhesive is 0.02 mm~0.04mm;

[0049] (3) On one side of the conductive com...

Embodiment 3

[0053] See attached image 3 As shown, the production of surface protective conductive composite flat plate: the length is 1200mm±2mm, the width is 200mm±2mm, the thickness is 3.3mm±0.2mm, the steps are as follows:

[0054] (1) First lay the DP328 / 3233 aramid fiber prepreg fabric blank with a thickness of 3mm±0.2mm, the size is 1210mm in length and 210mm in width, and then lay the pure metal aluminum foil conductive mesh with a thickness of 0.05mm~0.08mm as the conductive layer 2 Paste on the surface of both sides of the prepreg, and then precure at 125°C for 20 minutes to obtain a conductive composite material prefabricated part;

[0055] (2) Cut the size of the prefabricated part to be 1200mm in length and 200mm in width, polish the surface of one side of the prefabricated part, clean it with acetone, and then evenly spray polymer adhesive glue on the surface as the adhesive layer 3, and the thickness of the adhesive is 0.02mm ~0.04mm;

[0056] (3) Lay high-damping ethylen...

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Abstract

The invention relates to a surface-protection-type conductive composite material and a preparation method thereof. The composite material is prepared by carrying out compounding and mould pressing ona resin-based composite material, an adhesive layer, a conductive layer, a reinforcing layer and a protective layer, wherein the adhesive layer is an inorganic or organic adhesive, the conductive layer is a pure conductive metal mesh or a high-molecular resin conductive adhesive film or a high-molecular resin insulating adhesive film / conductive metal mesh composite adhesive film or a high-molecular resin conductive adhesive film / conductive metal mesh composite adhesive film, the reinforcing layer is made of a fabric, and the protective layer is made of a rubber material. The preparation methodcomprises the following steps: firstly, cutting a prepreg, the adhesive layer, the conductive layer, the reinforcing layer and the protective layer in a layer-by-layer mode according to the shape andsize of the composite material product, and then carrying out integral curing and forming on the conductive layer with the resin-based composite material, then preparing the resin-based composite material with the adhesive layer, the reinforcing layer and the protective layer into blanks, and finally carrying out compression molding.

Description

technical field [0001] The invention relates to a surface protection type conductive composite material and a preparation method thereof, belonging to the technical field of conductive composite materials. Background technique [0002] Fiber-reinforced resin-based composite materials have the characteristics of strong designability, high specific strength, corrosion resistance, good structural and dimensional stability, and good fatigue fracture resistance. The amount of structural materials has become one of the important symbols of the advanced nature of aircraft. However, compared with traditional metal materials, although the carbon fiber in the composite material has better conductivity, the insulating resin blocks the conductive path; The heat, as a result, has an ablation effect on the composite material, greatly reducing its strength and stiffness, thus posing a great challenge to the safety and economy of aircraft structures. [0003] At present, to improve the li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B25/10B32B25/12B32B25/14B32B27/06B32B15/02B32B15/20B32B7/12B32B27/04B32B27/36B32B27/34B32B9/00B32B9/04B32B17/02B32B17/06B32B27/38B32B27/42B32B27/28
CPCB32B5/02B32B7/12B32B9/043B32B15/02B32B15/20B32B17/063B32B25/10B32B25/12B32B25/14B32B27/06B32B27/08B32B27/28B32B27/281B32B27/38B32B27/42B32B2260/021B32B2260/046B32B2262/0261B32B2262/0276B32B2262/062B32B2262/101B32B2262/106B32B2307/202B32B2307/552B32B2307/558B32B2307/56
Inventor 董慧民史海燕李跃腾钱黄海程丽君苏正涛刘嘉
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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