CF/peek composite material with full transverse crystal structure and preparation method thereof

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 and so on

Active Publication Date: 2021-03-26
上海东华复材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 thereof
  • CF/peek composite material with full transverse crystal structure and preparation method thereof
  • CF/peek composite material with full transverse crystal structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

[0053] (1) Sinter 3K5 satin fabrics of CF T300 grade 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 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 ;

[0055] (3) ACF is immersed in polyetherimide / methylene chloride / carbon nanotube suspension for 180min, the weight average molecular weight of polyetherimide is 50080, and carbon nanotube is a carboxyl-modified single-walled carbon nanotube, Take it out and dry it to a water content of 0.48wt.%, to obtain sizing modified carbon fiber MCF...

Embodiment 2

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

[0075] (1) Sinter 3K5 satin fabrics of CF T300 grade at 350°C for 138min 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 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 ;

[0077] (3) ACF is immersed in polyetherimide / methylene chloride / carbon nanotube suspension for 165min, the weight average molecular weight of polyetherimide is 52000, and carbon nanotube is a carboxyl-modified single-walled carbon nanotube, Take it out and dry it until the water content is 0.45wt.%, to obtain sizing modified carbon fiber MCF;

[0078] In the po...

Embodiment 3

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

[0085] (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;

[0086] (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 ;

[0087] (3) ACF is immersed in polyetherimide / dichloromethane / carbon nanotube suspension for 134min, the weight average molecular weight of polyetherimide is 55000, and carbon nanotube is a single-walled carbon nanotube modified by carboxyl group, Take it out and dry it to a water content of 0.42wt.%, to obtain sizing modified carbon fiber MCF;

[0...

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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 polyetheretherketone (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 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, machinery, automobile and rail transit and other fields. [0003] However, the actual application of CF / PEEK thermoplasti...

Claims

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Application Information

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Patent Type & Authority Patents(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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