Preparation method of lightning protection composite material based on thermal insulation mechanism and insulation mechanism

A technology of lightning protection and composite materials, applied in textiles and papermaking, single-component synthetic polymer rayon, fiber chemical characteristics, etc., can solve the problems of carbon fiber reinforced resin layer damage, poor resin compatibility, and increased aircraft fuel consumption. Achieve low thermal conductivity, high insulation performance, and improve the effect of lightning protection

Active Publication Date: 2020-04-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of common metal lightning protection methods, such as easy corrosion, poor compatibility with resin, high density, which increases aircraft fuel consumption, and carbon nanotube film as a conductive and thermally conductive layer during lightning strikes, but its resistance to strong current and Joule heat is not only Only in the carbon nanotube film, some currents and Joule heat will erode the carbon fiber reinforced resin layer, which will cause certain damage to the carbon fiber reinforced resin layer. The invention provides a lightning protection composite based on heat insulation and insulation mechanism. The preparation method of the material adopts the following technical scheme:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a method for preparing a lightning protection composite material based on heat insulation and insulation mechanism, the method is as follows:

[0037] (1) Take a certain amount of dispersant triton, dissolve it in deionized water, and obtain a concentration of triton aqueous solution that is 1000mg / L; carbon nanotubes are added in the triton aqueous solution, wherein carbon nanotubes and dispersed The mass ratio of the agent is carbon nanotubes: dispersant=1:15, ultrasonically dispersed for 12 hours to obtain a uniformly dispersed carbon nanotube suspension; the nylon filter membrane with a diameter of 0.45um is placed on a vacuum filtration device, and the The uniformly dispersed carbon nanotube suspension is vacuum filtered until the solution is completely suction filtered to form a uniform carbon nanotube film, and the uniform carbon nanotube film obtained above is dried in a vacuum oven at 90°C for 10 hours , peeling off the filter membrane ...

Embodiment 2

[0043] This embodiment provides a method for preparing a lightning protection composite material based on heat insulation and insulation mechanism, the method is as follows:

[0044] (1) Take a certain amount of sodium dodecylbenzenesulfonate and dissolve it in deionized water to obtain a sodium dodecylbenzenesulfonate aqueous solution with a concentration of 500mg / L; carbon nanotubes are added to dodecylbenzenesulfonate In sodium benzenesulfonate aqueous solution, wherein the mass ratio of carbon nanotubes and dispersing agent is carbon nanotubes: dispersing agent=1:10, ultrasonic dispersion 11 hours, obtain the carbon nanotube suspension liquid of dispersing evenly; Dial 0.45um The nylon filter membrane is placed on the vacuum filtration device, and the uniformly dispersed carbon nanotube suspension is added for vacuum filtration until the solution is completely suction filtered to form a uniform carbon nanotube film. The uniform carbon nanotube film obtained above is The fi...

Embodiment 3

[0050] This embodiment provides a method for preparing a lightning protection composite material based on heat insulation and insulation mechanism, the method is as follows:

[0051](1) Take a certain amount of triton, dissolve it in a container to obtain a certain concentration of deionized water, and its concentration is 100mg / L; add carbon nanotubes to the solution containing dispersant, wherein carbon nanotubes and dispersant The mass ratio of carbon nanotubes: dispersant = 1:5, and ultrasonically dispersed for 10 hours to obtain a uniformly dispersed carbon nanotube suspension; a nylon filter membrane with a diameter of 0.45um was placed on a vacuum filtration device, and the dispersant was added The uniform carbon nanotube suspension is vacuum filtered until the solution is completely suction filtered to form a uniform carbon nanotube film, and the uniform carbon nanotube film obtained above is dried for 10 hours in a vacuum oven at 90°C. Peeling off the filter membrane ...

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Abstract

The invention discloses a preparation method of a lightning protection composite material based on the thermal insulation mechanism and the insulation mechanism, and belongs to the technical field ofcomposite materials. The preparation method comprises the steps of preparing carbon nano tube film; using a spinning machine to prepare thermoplastic polyimide electrostatic spinning film; preparing acarbon fiber reinforced resin prepreg plate, spreading the thermoplastic polyimide electrostatic spinning film and the carbon nano tube film over the prepreg plate in sequence, carrying out vacuum hot pressing, and carrying out cooling to the room temperature to obtain the carbon fiber reinforced resin lightning protection composite material with the carbon nano tube film and the thermoplastic polyimide electrostatic spinning film. According to the lightning protection composite material based on the thermal insulation mechanism and the insulation mechanism, and compared with a carbon fiber reinforced resin composite material, the electrical conductivity is obviously increased, and it is beneficial for improving the lightning protection performance of the composite material; and the preparation method is suitable for preparing the lightning protection material.

Description

technical field [0001] The invention relates to a preparation method of a lightning protection composite material based on a heat insulation and insulation mechanism, and belongs to the technical field of lightning protection composite materials. Background technique [0002] Composite materials are widely used in the aviation industry because of their high specific strength, high specific modulus, fatigue resistance, corrosion resistance, and structural designability. Moreover, due to the requirements of weight reduction, integration, composite effect, designability and multi-function, composite materials are more and more widely used in advanced aircraft structures. However, compared with traditional metal materials such as aluminum alloys and titanium alloys, composite materials have poor electrical conductivity, which leads to the lack of electromagnetic shielding performance of aircraft structures, which makes composite aircraft structures prone to serious damage in ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34D01F6/74C08G73/10
CPCB29C70/342C08G73/1007C08G73/1071D01F6/74
Inventor 冷劲松夏乾善张志春刘彦菊
Owner HARBIN INST OF TECH
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