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High impact interface modified cf/peek composite material and its preparation method

A composite material, high impact technology, applied in the field of carbon fiber reinforced polyether ether ketone composite materials, can solve the problems of small improvement and difficult to realize industrial production and so on

Active Publication Date: 2020-12-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The above-mentioned known technologies can significantly increase the interaction force between the fiber and the matrix, thereby improving the flexural strength and layer shear shear strength of the CF / PEEK composite, but the residual compressive strength (CAI) after impact that reflects the impact resistance The increase is often small, usually lower than 260MPa; and it is difficult to realize industrial production by using strong acid or plasma treatment in the preparation process; the oxygen / carbon (O / C) content ratio after CF surface activation increases by 40 %about

Method used

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  • High impact interface modified cf/peek composite material and its preparation method
  • High impact interface modified cf/peek composite material and its preparation method
  • High impact interface modified cf/peek composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The preparation method of the CF / PEEK composite material of high-impact interface modification, the steps are as follows:

[0050] (1) Sinter 3K5 satin fabrics of CF T300 grade at 300°C for 180 minutes to decompose the original sizing agent on the surface;

[0051] (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 ;

[0052] (3) Immerse the ACF in a polyarylsulfone / N,N-dimethylacetamide solution with a concentration of 0.2wt.% for 120min. The weight-average molecular weight of the polyarylsulfone is 56000, take it out and dry it until the water content is 0.48wt. %, to obtain sizing modified carbon fiber MCF;

[0053] (4) MCF and PEEK powder with a w...

Embodiment 2

[0072] The preparation method of the CF / PEEK composite material of high-impact interface modification, the steps are as follows:

[0073] (1) Sinter 3K5 satin fabrics of CF T300 grade at 350°C for 138min to decompose the original sizing agent on the surface;

[0074] (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 ;

[0075] (3) Immerse the ACF in a polyarylsulfone / N,N-dimethylacetamide solution with a concentration of 0.8wt.% for 115min. The weight-average molecular weight of the polyarylsulfone is 58000, take it out and dry it to a water content of 0.45wt. %, to obtain sizing modified carbon fiber MCF;

[0076] (4) MCF and PEEK powder with a weight-average molecular weight ...

Embodiment 3

[0080] The preparation method of the CF / PEEK composite material of high-impact interface modification, the steps are as follows:

[0081] (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;

[0082] (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 ;

[0083] (3) Immerse the ACF in a polyarylsulfone / N,N-dimethylacetamide solution with a concentration of 1.2wt.% for 94min. The weight-average molecular weight of the polyarylsulfone is 59100, take it out and dry it to a water content of 0.42wt. %, to obtain sizing modified carbon fiber MCF;

[0084] (4) MCF and PEEK non-woven felt with a weight-avera...

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Abstract

The invention relates to a high-impact interface modified CF / PEEK composite material and a preparation method thereof. The preparation 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, andmarking a product as ACF; (3) immersing ACF into a polyarylsulfone (PSF) / N, N-dimethylacetamide solution, taking out, and drying to obtain sized modified carbon fiber MCF; (4) laminating and hot-pressing the MCF and the PEEK material to obtain the high-impact-resistance interface modified CF / PEEK composite material. The bending strength of the high-impact interface modified CF / PEEK composite material ranges from 700 MPa to 950 MPa, the bending modulus ranges from 50 GPa to 65 GPa, the interlaminar shear strength (ILSS) ranges from 75 MPa to 90 MPa, and the residual compression strength (CAI)of the high-impact interface modified CF / PEEK composite material after impact reflecting the impact resistance ranges from 260 MPa to 310 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, rail transit, petroleum transportation 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 high impact resistance interface modification 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 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 act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/06C08L61/16C08K9/10C08K9/00C08K7/06
CPCC08J5/06C08J2361/16C08K7/06C08K9/00C08K9/10
Inventor 朱姝周剑锋吴举任毅史如静孙一剑
Owner DONGHUA UNIV
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