CF/PEEK composite material with excellent high-temperature mechanical properties and preparation method thereof

A technology of high-temperature mechanics and composite materials, applied in the field of carbon fiber reinforced polyetheretherketone composite materials, can solve problems such as difficult to realize industrial production

Active Publication Date: 2020-07-14
常州君航高性能复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The CF / PEEK composite material prepared by the above-mentioned known technology is usually lower than 85MPa when used at room temperature, and a few technologies exceed 90MPa. However, it is difficult to realize industrial production by using strong acid or plasma treatment in the preparation process.

Method used

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  • CF/PEEK composite material with excellent high-temperature mechanical properties and preparation method thereof
  • CF/PEEK composite material with excellent high-temperature mechanical properties and preparation method thereof
  • CF/PEEK composite material with excellent high-temperature mechanical properties and preparation method thereof

Examples

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Embodiment 1

[0053] A method for preparing a CF / PEEK composite material with excellent high-temperature mechanical properties, the steps are as follows:

[0054] (1) Sinter 3K5 satin fabrics of CF T300 grade at 300°C for 180 minutes to decompose the original sizing agent on the surface;

[0055](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 ;

[0056] (3) Immerse the ACF in the polyamic acid / N-methyl-2-pyrrolidone / carbon nanotube suspension for 120min, the weight average molecular weight of the polyamic acid is 55500, take it out and dry it until the water content is 0.48wt.%. Two-stage heat treatment was carried out to obtain sizing modified carbon fiber MCF; in the ...

Embodiment 2

[0069] A method for preparing a CF / PEEK composite material with excellent high-temperature mechanical properties, the steps are as follows:

[0070] (1) Sinter 3K5 satin fabrics of CF T300 grade at 350°C for 138min to decompose the original sizing agent on the surface;

[0071] (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 ;

[0072] (3) Immerse the ACF in the polyamic acid / N-methyl-2-pyrrolidone / carbon nanotube suspension for 115min, the weight average molecular weight of the polyamic acid is 55800, take it out and dry it until the water content is 0.45wt.%. Two-stage heat treatment is carried out to obtain sizing modified carbon fiber MCF, and the scanning electron microsc...

Embodiment 3

[0077] A method for preparing a CF / PEEK composite material with excellent high-temperature mechanical properties, the steps are as follows:

[0078] (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;

[0079] (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 ;

[0080] (3) Immerse the ACF in the polyamic acid / N-methyl-2-pyrrolidone / carbon nanotube suspension for 94min, the weight average molecular weight of the polyamic acid is 56100, take it out and dry it until the water content is 0.42wt.%. Two-stage heat treatment was carried out to obtain sizing modified carbon fiber MCF; in the polyamic acid...

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Abstract

The invention relates to a CF/PEEK composite material with excellent high-temperature mechanical properties and a preparation method of the CF/PEEK composite material. The preparation method comprisesthe following steps: (1) carrying out high-temperature decomposition on an original sizing agent on the surface of CF; (2) simultaneously carrying out microwave radiation and ultraviolet irradiationon CF in a saturated water vapor environment, and marking a product as ACF; (3) immersing ACF into the polyamic acid/N-methyl-2-pyrrolidone/carbon nanotube suspension, taking out, drying, and carryingout two-stage heat treatment to obtain sized modified carbon fiber MCF; (4) laminating and hot-pressing the MCF and the PEEK material; wherein the bending strength of the CF/PEEK composite material at 25 DEG C is 780-950 MPa, the bending modulus of the CF/PEEK composite material at 25 DEG C is 55-65 GPa, and the interlayer shear strength of the CF/PEEK composite material at 25 DEG C is 80-93 MPa;the bending strength at 200 DEG C is 550 to 650 MPa, the bending modulus is 40 to 50 GPa, and the interlaminar shear strength is 60 to 75 MPa. The method disclosed by the invention has the characteristics of high efficiency, environmental friendliness and capability of realizing large-scale production, and the prepared composite material can replace metal to be applied to the fields of aerospace,medical treatment, machinery, automobiles and the like.

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 excellent high-temperature mechanical properties 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] Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L61/16C08K9/10C08K9/00C08K7/06C08K3/04
CPCC08J5/06C08J2361/16C08K2201/011C08K3/041
Inventor 朱姝周剑锋韩克清史如静钱盈任毅
Owner 常州君航高性能复合材料有限公司
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