CF/peek composite material with high fatigue strength and preparation method thereof

A fatigue strength and composite material technology, which is applied in the field of carbon fiber reinforced polyetheretherketone composite materials, can solve problems such as difficulty in realizing industrialized production

Active Publication Date: 2021-06-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] 10 of the CF / PEEK composite material prepared by above-mentioned known technology 7 The sub-cycle bending fatigue strength usually does not exceed 300MPa, and a few exceed 300MPa, but it is difficult to realize industrial production in the preparation process by using strong acid or plasma treatment

Method used

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  • CF/peek composite material with high fatigue strength and preparation method thereof
  • CF/peek composite material with high fatigue strength and preparation method thereof
  • CF/peek composite material with high fatigue strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation method of the CF / PEEK composite material with high fatigue strength, the steps are as follows:

[0051] (1) Sinter 3K5 satin fabrics of CF T300 grade at 300°C for 180 minutes to decompose the original sizing agent on the surface;

[0052] (2) In a saturated water vapor environment with a relative humidity of 95.3%, microwave irradiation and ultraviolet light irradiation are carried out on CF simultaneously, and the product is recorded as ACF; the time of microwave irradiation is 30min, and the microwave frequency is 300MHz; the wavelength of ultraviolet light is irradiated 290nm, UV irradiance is 20W / m 2 ;

[0053] (3) Immerse the ACF in the polyetherimide / dichloromethane / carbon nanotube suspension for 180min, the weight average molecular weight of the polyetherimide is 51000, take it out and dry it until the water content is 0.48wt.%, to obtain the sizing Modified carbon fiber MCF, scanning electron microscope photos as Figure 4 Shown; In the polyet...

Embodiment 2

[0066] The preparation method of the CF / PEEK composite material with high fatigue strength, the steps are as follows:

[0067] (1) Sinter 3K5 satin fabrics of CF T300 grade at 350°C for 138min to decompose the original sizing agent on the surface;

[0068] (2) In a saturated water vapor environment with a relative humidity of 95.8%, CF is irradiated with microwaves and ultraviolet light at the same time, and the product is recorded as ACF; the time of microwave irradiation is 27min, and the microwave frequency is 820MHz; the wavelength of ultraviolet light is irradiated 299nm, UV irradiance is 50W / m 2 ;

[0069] (3) Immerse the ACF in the polyetherimide / dichloromethane / carbon nanotube suspension for 175min, the weight average molecular weight of the polyetherimide is 55000, take it out and dry it until the water content is 0.45wt.%, to obtain the sizing Modified carbon fiber MCF; in the polyetherimide / methylene chloride / carbon nanotube suspension, the polyetherimide content ...

Embodiment 3

[0074] The preparation method of the CF / PEEK composite material with high fatigue strength, the steps are as follows:

[0075] (1) Sinter 5 pieces of satin fabric of T300 grade 3K of CF at 420°C for 5 minutes to decompose the original sizing agent on the surface;

[0076] (2) In a saturated water vapor environment with a relative humidity of 95.9%, CF is irradiated with microwaves and ultraviolet light at the same time, and the product is denoted as ACF; the time of microwave irradiation is 24min, and the microwave frequency is 1GHz; the wavelength of ultraviolet light is irradiated 305nm, UV irradiance is 35W / m 2 ;

[0077] (3) Immerse the ACF in the polyetherimide / dichloromethane / carbon nanotube suspension for 142min, the weight average molecular weight of the polyetherimide is 59050, take it out and dry it until the water content is 0.42wt.%, to obtain the sizing Modified carbon fiber MCF; polyetherimide / dichloromethane / carbon nanotube suspension, polyetherimide content i...

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Abstract

The invention relates to a CF / PEEK composite material with high fatigue strength and a preparation method thereof. The preparation method comprises the following steps: (1) pyrolyzing the original sizing agent on the CF surface; (2) in a saturated water vapor environment, Simultaneously irradiate CF with microwave radiation and ultraviolet light, and the product is denoted as ACF; (3) ACF is immersed in polyetherimide / dichloromethane / carbon nanotube suspension, taken out and dried to obtain sizing modified carbon fiber MCF; (4) MCF and PEEK materials are stacked and hot-pressed; promptly the CF / PEEK composite material with high fatigue strength is obtained; the flexural strength of the CF / PEEK composite material finally made is 700-800MPa, 10 7 The secondary cycle bending fatigue strength is 360‑440MPa, the flexural modulus is 55‑62GPa, the interlaminar shear strength is 87‑100MPa, and the residual compressive strength after impact is 220‑260MPa. The method of the invention is characterized by high efficiency, environmental protection, and large-scale production, and the prepared composite material can replace metals and be used in fields such as aerospace, medical treatment, machinery, automobiles, rail transportation, and petroleum transportation.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber reinforced polyetheretherketone (CF / PEEK) composite materials, and relates to a CF / PEEK composite material with high fatigue strength and a preparation method thereof. Background technique [0002] In recent years, thermoplastic composites have attracted extensive attention due to their advantages such as good recyclability, secondary processability, high impact toughness, high specific strength, and high specific modulus. Among various thermoplastic composite materials, CF / PEEK has excellent properties such as high stiffness, high thermal stability, chemical corrosion resistance, wear resistance, and biocompatibility, and is expected to be used as a structural material to replace mature metal or thermosetting composite materials. , Widely used in aerospace, medical, machinery, automobile and rail transportation, oil transportation and other fields. [0003] However, the actual application o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/02B32B27/12B32B27/28B32B33/00B32B37/06B32B37/10C08L79/08C08K3/04C08K7/06D06M10/00
CPCB32B5/02B32B5/16B32B5/26B32B9/045B32B9/047B32B9/048B32B27/12B32B27/288B32B33/00B32B37/06B32B37/10B32B2260/021B32B2260/046B32B2262/02B32B2264/0214B32B2307/546B32B2307/558C08K7/06C08K2201/011C08K3/041D06M10/001D06M10/003C08L79/08
Inventor 周剑锋朱姝王文翰史如静瞿明城陆意
Owner DONGHUA UNIV
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