Flame-retardant modified carbon fiber prepreg and composite material product

A technology of carbon fiber prepreg and flame-retardant materials, which is applied in the field of structural composite materials, can solve the problems of changing the molding process, difficult process, poor processability, etc., and achieve the effects of improving toughness, inhibiting air diffusion, and inhibiting combustion

Active Publication Date: 2015-04-29
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the flame retardant modification of carbon fiber composite materials, one is to use a flame retardant matrix resin, but some resin systems such as polyimide have better high temperature resistance and flame retardancy, but are extremely expensive and have poor processability One is to modify existing flammable resins such as epoxy resins by using additive flame retardants. Therefore, most of the existing aviation epoxy resin-based composite materials have not been flame-reta

Method used

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  • Flame-retardant modified carbon fiber prepreg and composite material product
  • Flame-retardant modified carbon fiber prepreg and composite material product

Examples

Experimental program
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Effect test

Example Embodiment

[0033] Example 1:

[0034] The implementation process of the technical solution of the present invention is as follows:

[0035] (1-1) Disperse 3g of silica nanoparticles or nano-layered silicate clay or halloysite nanotubes into N,N-dimethylformamide or N,N-dimethylacetamide, three The diameter or layer thickness of each is 50nm, 70nm and 35nm, and then 75g of phenolphthalein modified polyaryletherketone (PEK-C) or polyethersulfone (PES-C) and 25g of polyphenylphosphonic acid diphenylsulfone Ester, make it uniformly dissolved in the dispersion, and ultrasonically disperse to obtain a uniform dispersion; cast the solution into a film, control the final film thickness at 18μm or 32μm by the amount of the solution, and blow dry at 80°C for 1 hour, then Vacuum drying at 100°C for 10 hours or 15 hours. After removing the film, a flame-retardant modified film is obtained, and a needle hole is pierced every 5mm with a thick needle with a diameter of 0.5mm.

[0036] (1-2) Take the flame-r...

Example Embodiment

[0041] Example 2:

[0042] The implementation process of the technical solution of the present invention is as follows:

[0043] (2-1) Dissolve 17 g of phenolphthalein modified polyaryl ether ketone or phenolphthalein modified polyaryl ether sulfone or polyethylene terephthalate into 83 g of N,N-dimethylformamide, with a mass percentage concentration of 17 %, then add 0.35g of 25nm diameter multi-walled carbon nanotubes and 0.5g of carbon-60, add 0.1g of polyvinylpyrrolidone to improve the dispersibility of the carbon nanomaterials, after adding, ultrasonically mix uniformly, and set aside. The thickness of the coated solution liquid film is controlled to be 100μm or 150μm by using spacer film, and then dried in an oven, the film is removed and mechanically drilled to obtain a flame-retardant modified and toughened film with a thickness ranging from 15μm to 20μm or 24 to 30μm .

[0044] (2-2) Lay the flame retardant modified film obtained by the above loading one by one on the benz...

Example Embodiment

[0045] Example 3:

[0046] The implementation process of the technical solution of the present invention is as follows:

[0047] (3-1) Heat and dissolve 18g polyetherimide or 17g polyphenylene sulfide in DMF to form a solution with a mass percentage concentration of 18% or 17%, and add 7g or 4g polymer flame retardant or 5.5g respectively Small molecule flame retardant, polymer flame retardant is polyphenyl phosphonate diphenyl sulfone ester or triphenyl phosphine oxide type polyaryl ether containing nitrogen heterocycle or tribromophenol modified linear phenolic resin, small molecule resistance The fuel is octabromoether or decabromodiphenyl ether or N,N-bis(5,5-dimethyl-4-substituted phenyl-2-oxo-1,3,2-dioxaphosphorane )-4,4'-p-diphenylmethane or N,N-bis(5,5-dimethyl-4-substituted phenyl-2-oxo-1,3,2-dioxaphosphorane )-4,4'-p-diphenylsulfone, dissolve and stir evenly, cast into a film, control the amount of solution to control the final dried film thickness to 20μm or 28μm, dry ...

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Abstract

The invention relates to flame-retardant modified carbon fiber prepreg and a composite material product with high flame retardance. A flame-retardant film with an interlayer combustion barrier action can be formed after being applied to a carbon fiber reinforced lamination resin based composite material, and the film has a certain thickness, consists of a thermoplastic toughening agent capable of being thermally dissolved into resin and a flame retardant and/or nano particles which are uniformly dispersed into the film, and is used for preparing the flame-retardant modified carbon fiber resin prepreg together with conventional carbon fiber resin prepreg. After the prepreg is prepared into the composite material, a continuous combustion barrier layer is formed among layers and is dispersed into a layer with a high carbon fiber content to take a collaborative barrier effect, thereby achieving a good flame retardance effect. UL94 perpendicular combustion method shows that the flame-retardant level can reach V0 above without overflowing smog in combustion, while an unmodified composite material has no flame-retardant level and generates a great amount of smog, and moreover, the iris layer has a dual-continuous complex-phase structure, and the toughness of the composite material can be improved.

Description

technical field [0001] The invention belongs to the technical field of structural composite materials, and relates to a flame-retardant modified carbon fiber prepreg and a high flame-retardant composite material product. Background technique [0002] Fire is one of the main safety hazards of commercial and military aircraft. The high heat, smoke and toxic substances produced by fire seriously threaten the lives of passengers. Among all aircraft accidents, fire ranks fourth among the causes (Boeing 2005, Statistical summary of commercial jet airplane accidents-worldwide operations 1959-2004, Seattle, Washington, US, P.18.), and fire fatalities are increasing at a rate of 4% per year [FAA website]. [0003] Carbon fiber-reinforced resin-based laminated composite materials are mainly used to manufacture the shell and skin of aerospace vehicles. Since entering the 21st century, represented by the US B787 and the European A380 large aircraft, continuous carbon fiber-reinforced po...

Claims

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Application Information

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IPC IPC(8): B32B27/04B32B27/06B32B27/18
CPCB32B9/007B32B27/06B32B27/18B32B2260/046
Inventor 郭妙才益小苏
Owner AVIC COMPOSITES
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