CF/PEEK composite material with chemical bond strong interface and preparation method thereof

A composite material and chemical bond technology, which is applied in the field of CF/PEEK composite material and its preparation, can solve problems such as difficult to realize industrial production

Active Publication Date: 2020-07-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The CF / PEEK composite materials prepared by the above-mentioned known techniques usually have an IFSS lower than 85MPa, and a few technologies exceed 90MPa. However, 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 chemical bond strong interface and preparation method thereof
  • CF/PEEK composite material with chemical bond strong interface and preparation method thereof
  • CF/PEEK composite material with chemical bond strong interface and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] There is the preparation method of the CF / PEEK composite material of strong chemical bond interface, and 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 aminated PEEK / dimethylformamide / carbon nanotube suspension in a nitrogen atmosphere and raise it to 50°C and keep it for 1h, take it out and dry it to a water content of 0.48wt.%, to obtain a sizing modification Carbon fiber MCF; in the aminated PEEK / dimethylformamide / carbon nanotube suspension,...

Embodiment 2

[0070] There is the preparation method of the CF / PEEK composite material of strong chemical bond interface, and the steps are as follows:

[0071] (1) Sinter 3K5 satin fabrics of CF T300 grade at 350°C for 138min to decompose the original sizing agent on the surface;

[0072] (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 ;

[0073] (3) Immerse the ACF in the aminated PEEK / dimethylformamide / carbon nanotube suspension in a nitrogen atmosphere and raise it to 52°C and keep it for 1.5h. Permanent carbon fiber MCF; in the aminated PEEK / dimethylformamide / carbon nanotube suspension, the aminated PEEK is completely dissolved with a concentration of 0.8wt.%, and the content of carbon...

Embodiment 3

[0079] There is the preparation method of the CF / PEEK composite material of strong chemical bond interface, and the steps are as follows:

[0080] (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;

[0081] (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 ;

[0082] (3) Immerse the ACF in the aminated PEEK / dimethylformamide / carbon nanotube suspension in a nitrogen atmosphere and raise it to 51°C and keep it for 3h, take it out and dry it to a water content of 0.42wt.%, to obtain a sizing modification Carbon fiber MCF; in the aminated PEEK / dimethylformamide / carbon nanotube suspension, the aminated...

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Abstract

The invention relates to a CF/PEEK composite material with a chemical bond strong interface 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 CF in a saturated water vapor environment, and marking a product as ACF; (3) immersing ACF into the aminated PEEK/dimethylformamide/carbon nanotube suspension, performing heating to enable aminated PEEK to react with ACF, taking out, and drying, so asto obtain sized modified carbon fiber MCF; and (4) laminating and hot-pressing the MCF and the PEEK material, the CF/PEEK composite material with the chemical bond strong interface is obtained. The bending strength of the finally prepared CF/PEEK composite material with the chemical bond strength interface is 900-1100 MPa, the bending modulus of the finally prepared CF/PEEK composite material is57-65 GPa, the interface shear strength of the finally prepared CF/PEEK composite material is 100-120 MPa, and the residual compression strength of the finally prepared CF/PEEK composite material after impact is 210-250 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 CF/PEEK composite material can replace metal to be applied to the fields of aerospace, medical treatment, 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 strong chemical bond interface 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 ap...

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 朱姝周剑锋史如静任毅王文翰敖文珍
Owner DONGHUA UNIV
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