CF/PEEK composite material with full-transverse crystal structure and preparation method of CF/PEEK composite material

A composite material and crystal structure technology, applied in the field of carbon fiber reinforced polyether ether ketone composite materials, can solve the problem of low flexural modulus

Active Publication Date: 2020-08-14
上海东华复材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] On the other hand, although the flexural modulus of the composite material along the CF direction is high, the flexural modulus perpendicular to the CF direction depends on the PEEK resin matrix. Since the modulus of the resin is much lower than the CF modulus, the composite material vertical The flexural modulus in the CF direction is usually not high, and the bidirectional mechanical properties can only be improved by 0 / 90° ply design or bidirectionally arranged fabric forms (such as satin, etc.)
The flexural modulus of CF / PEEK composites prepared by known techniques is usually lower than 65GPa

Method used

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  • CF/PEEK composite material with full-transverse crystal structure and preparation method of CF/PEEK composite material
  • CF/PEEK composite material with full-transverse crystal structure and preparation method of CF/PEEK composite material
  • CF/PEEK composite material with full-transverse crystal structure and preparation method of CF/PEEK composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0052] The preparation method of CF / PEEK composite material with full transverse crystal structure, the steps are as follows:

[0053] (1) Sinter the CF T300 grade 3K5 satin fabric at 300°C for 180 minutes to decompose the original sizing agent on the surface;

[0054] (2) In a saturated water vapor environment with a relative humidity of 95.3%, microwave radiation and ultraviolet light irradiation are performed on the CF at the same time, and the product is recorded as ACF; the microwave radiation time is 30min, the microwave frequency is 300MHz; the ultraviolet wavelength is irradiated 290nm, ultraviolet irradiance is 20W / m 2 ;

[0055] (3) Immerse the ACF in the polyetherimide / dichloromethane / carbon nanotube suspension for 180 minutes. The weight average molecular weight of the polyetherimide is 50080. The carbon nanotubes are carboxyl modified single-walled carbon nanotubes. Take it out and dry it to a moisture content of 0.48wt.% to obtain a sizing modified carbon fiber MCF;

[...

Embodiment 2

[0074] The preparation method of CF / PEEK composite material with full transverse crystal structure, the steps are as follows:

[0075] (1) Sinter the CF T300 grade 3K5 satin fabric at 350°C for 138 minutes to decompose the original sizing agent on the surface;

[0076] (2) In a saturated water vapor environment with a relative humidity of 95.8%, CF was irradiated with microwave radiation and ultraviolet light at the same time, and the product was recorded as ACF; the microwave radiation time was 27min, the microwave frequency was 820MHz; the ultraviolet wavelength was irradiated 299nm, UV irradiance is 50W / m 2 ;

[0077] (3) Immerse the ACF in the polyetherimide / dichloromethane / carbon nanotube suspension for 165 minutes. The weight average molecular weight of the polyetherimide is 52,000. The carbon nanotubes are carboxyl modified single-walled carbon nanotubes. After taking it out, it is dried to a moisture content of 0.45wt.% to obtain a sizing modified carbon fiber MCF;

[0078] I...

Embodiment 3

[0084] The preparation method of CF / PEEK composite material with full transverse crystal structure, the steps are as follows:

[0085] (1) Sinter the CF T300 grade 3K5 satin fabric at 420℃ for 5 minutes to decompose the original sizing agent on the surface;

[0086] (2) In a saturated water vapor environment with a relative humidity of 95.9%, microwave radiation and ultraviolet light are irradiated to CF at the same time, and the product is recorded as ACF; the microwave radiation time is 24min, the microwave frequency is 1GHz; the ultraviolet wavelength is irradiated 305nm, UV irradiance is 35W / m 2 ;

[0087] (3) Immerse the ACF in the polyetherimide / dichloromethane / carbon nanotube suspension for 134 minutes. The weight average molecular weight of the polyetherimide is 55,000. The carbon nanotubes are carboxyl modified single-walled carbon nanotubes. Take it out and dry it to a moisture content of 0.42wt.% to obtain a sizing modified carbon fiber MCF;

[0088] In the polyetherimide / ...

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Abstract

The invention relates to a CF/PEEK composite material with a full transverse crystal structure and a preparation method thereof. The method comprises the 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 irradiation on the CF in a saturated water vapor environment, and marking a product as ACF; (3) immersing the ACF into the polyetherimide/dichloromethane/carbon nanotube suspension, taking out, and drying to obtain sized modified carbon fiber MCF; (4) laminatingand hot-pressing the MCF and a PEEK material; (5) performing instantaneous pressure application and unloading in the cooling process to enable the resin to obtain perturbation shear flow, and inducingnucleation and growth of the full-transverse crystal structure to obtain the CF/PEEK composite material with the full transverse crystal structure. The bending strength of the finally prepared composite material is 750-900 MPa, the bending modulus of the finally prepared composite material is 63-75 GPa, and the interlayer shear strength of the finally prepared composite material is 90-100 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, machinery, automobiles, rail transit and the like.

Description

Technical field [0001] The invention belongs to the technical field of carbon fiber reinforced polyether ether ketone (CF / PEEK) composite materials, and relates to a CF / PEEK composite material with a full transverse crystal structure and a preparation method thereof. Background technique [0002] In recent years, thermoplastic composite materials have received extensive attention due to their advantages of 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 resistance, wear resistance, biocompatibility, etc., and is expected to be used as a structural material to replace mature metal or thermosetting composite materials. , It is widely used in aerospace, machinery, automobiles and rail transit. [0003] However, the actual application of CF / PEEK thermoplastic composites is not o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L61/16C08K9/00C08K9/04C08K9/02C08K7/06
CPCC08J5/06C08J2361/16C08K7/06C08K9/00C08K9/02C08K9/08
Inventor 朱姝周剑锋任毅苏佳煜张铠马禹
Owner 上海东华复材科技有限公司
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