A light lightning protection surface layer and its preparation and use method

A lightning protection and surface layer technology, applied in the field of composite material manufacturing, to achieve excellent lightning protection performance, good flexibility and materials, and good protection effects

Active Publication Date: 2019-10-08
ACC BEIJING SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a novel conductive-energy-absorbing integrated lightning strike protection surface layer, specifically to propose a lightweight lightning strike protection surface, in view of the inherent lightning strike protection capability defect of the current composite material structure and the deficiency of the existing lightning strike protection scheme Layers and methods of making and using same

Method used

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  • A light lightning protection surface layer and its preparation and use method
  • A light lightning protection surface layer and its preparation and use method
  • A light lightning protection surface layer and its preparation and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of the lightweight lightning protection surface layer of this example is as follows:

[0043] (1-1) Dissolving the phenolic resin in alcohol, the mass ratio of the phenolic resin to ethanol is 0.2. Stir until the phenolic resin is completely dissolved in ethanol;

[0044] (1-2) Add carbon nanotubes and vermiculite to the ethanol solution of phenolic resin. The diameter of carbon nanotubes is 10nm, and the particle size of vermiculite is 300μm; the proportions of carbon nanotubes and vermiculite in the matrix resin are respectively 40% and 10%. A carbon-based dispersant is added to optimize the dispersion effect of graphene, and the mass ratio of the dispersant to carbon nanotubes is (0.2). The above suspension was ultrasonically stirred at room temperature for 30 min at a stirring speed of 200 rpm. Prepare casting solution;

[0045] (1-3) 5 pieces of chemically silver-plated aramid non-woven fabric with a side length of 300 mm;

[0046] (1-4)...

Embodiment 2

[0050] The preparation method of the lightweight lightning protection surface layer of this example is as follows:

[0051] (1-1) The toughened benzoxazine resin was dissolved in chloroform, and the mass ratio of the benzoxazine resin to chloroform was 0.10. Stir until the benzoxazine resin is completely dissolved in chloroform;

[0052] (1-2) Add the expanded graphite to the chloroform solution of the benzoxazine resin, and the ratio of the expanded graphite to the double horse resin is 5%. The above suspension was ball milled at room temperature for 3 h, and the rotational speed of the ball mill was 50 rpm. Prepare casting solution;

[0053] (1-3) Cut 10 pieces of electroless copper-plated ramie felts, the diameter of ramie fibers is 20 μm;

[0054] (1-4) Keep the casting solution in a stirring state, transfer it into the roller brush machine in batches, and brush it on the surface of the electroless copper-plated ramie felt by the roller brush machine. Let stand for 1mi...

Embodiment 3

[0058] The preparation method of the lightweight lightning protection surface layer of this example is as follows:

[0059] (1-1) Polyaryletherketone was dissolved in tetrahydrofuran, and the mass ratio of polyaryletherketone to tetrahydrofuran was 0.05. Stir until the polyaryletherketone is completely dissolved in tetrahydrofuran;

[0060] (1-2) Adding silver nanowires and tin powder into a tetrahydrofuran solution of polyaryletherketone, the proportions of silver nanowires and tin powder in polyaryletherketone are 5% and 50% respectively. A silver dispersant is added to optimize the dispersion effect of the silver nanowires, and the mass ratio of the dispersant to the silver nanowires is 15%. The above suspension was placed at room temperature and stirred ultrasonically for 10 min at a stirring speed of 500 rpm. Prepare an impregnation solution;

[0061] (1-3) Cut 2 pieces of nickel-plated carbon felt, and the diameter of the nickel-plated carbon fiber is 15 μm.

[0062]...

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Abstract

The invention belongs to the technical field of manufacturing of composite materials, and relates to a lightweight lightning protection surface layer, and preparation and application methods thereof.The lightning protection surface layer comprises a continuous conduction network, a matrix, an energy absorption component and a conductive filling material, wherein the lightning protection surface layer has a thickness in a range of 10 to 500 [mu]m and a mass per unit area in a range of 20 to 500 g / m2; the fiber constituting the conduction network has a diameter in a range of 1 to 20 [mu]m; theenergy absorption component has a particle size in a range of 0.1 to 300 [mu]m and a mass ratio of 5 to 50% in a resin matrix; and the conductive filling material has a particle size in a range of 10nm to 100 [mu]m and a content accounting for 0 to 40% of the mass content of the matrix. The material provided by the invention has good flexibility and compatibility with a material and a process, can realize co-curing in a curing process of different composite materials, and is applicable to surface protection treatment of a complicated workpiece. Meanwhile, the surface layer provided by the invention has thermal expansion properties close to the thermal expansion properties of the composite material, avoids the problems of aging and peeling of a metal protective material in the process of outdoor application, and has broad prospects.

Description

technical field [0001] The invention belongs to the technical field of composite material manufacturing, and relates to a lightweight lightning protection surface layer and a preparation and application method thereof. Background technique [0002] Fiber-reinforced resin-based composite materials have been widely used in advanced technology fields such as aerospace and high-speed rail transportation due to their light weight and high strength properties. In the field of aviation, the amount of composite materials is a sign of the advanced level of aircraft structural design. As a lightweight material, composite materials account for more than 50% of the total structural weight of the most advanced A350 and B787 airliners. [0003] In addition to excellent specific strength and specific stiffness, resin-based composite materials also have excellent corrosion resistance and fatigue resistance, and can adapt to various service environments in different regions. Compared with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/10B32B37/00C08L61/06C08L71/10C08K7/24C08K3/34C08J5/24C08L61/34C08L1/02C08K7/06C08K3/08C08K9/02C08L63/00C08L77/00C08K3/04C08L79/08C08L9/02C08K7/14
Inventor 益小苏赵中杰仝建峰余金光王晋
Owner ACC BEIJING SCI & TECH CO LTD
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