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Preparation method of carbon fiber three-dimensional fabric enhanced polyimide-carbon based dual substrate composite material

A three-dimensional fabric and polyimide technology is applied in the field of preparation of carbon fiber three-dimensional fabric reinforced polyimide-carbon-based dual-element matrix composite materials, which can solve the problems of inability to serve for a long time and the reduction of mechanical properties of materials, and achieve an optimized interface. Mechanical properties, optimized fracture toughness, improved efficiency

Active Publication Date: 2019-10-01
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although C / C F The short-term use temperature reaches 3000°C, but oxidation begins to occur at 370°C in an aerobic environment, resulting in a decrease in the mechanical properties of the material and making it unable to serve for a long time

Method used

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  • Preparation method of carbon fiber three-dimensional fabric enhanced polyimide-carbon based dual substrate composite material
  • Preparation method of carbon fiber three-dimensional fabric enhanced polyimide-carbon based dual substrate composite material
  • Preparation method of carbon fiber three-dimensional fabric enhanced polyimide-carbon based dual substrate composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1 Carbon fiber three-dimensional fabric reinforced polyimide-carbon-based binary matrix composite (PI-C / C F ) preparation

[0061] In this implementation case, a method for preparing a carbon fiber three-dimensional fabric reinforced polyimide-carbon-based binary matrix composite material includes the following steps:

[0062] 1) Using carbon fiber three-dimensional fabric as a prefabricated body, the carbon matrix is ​​introduced through chemical vapor infiltration (CVI) and liquid phase impregnation-pyrolysis (PIP) processes to prepare a carbon-based composite blank with a density of 1.30g / cm3.

[0063] 2) Put the carbon-based composite material blank prepared in step (1) into the impregnation reaction kettle, and vacuumize at room temperature to make the pressure in the kettle reach 10 2 Pa, then the polyamic acid resin A (chemical structural formula as shown in formula I) that solid content is 40% is introduced in the still, impregnates blank 1.0h; Subseq...

Embodiment 2

[0066] Example 2 Preparation of carbon fiber three-dimensional fabric reinforced polyimide-carbon-based binary matrix composite (PI-C / CF)

[0067] In this embodiment, a method for preparing a carbon fiber three-dimensional fabric reinforced polyimide-carbon-based binary matrix composite material comprises the following steps:

[0068] 1) Using carbon fiber three-dimensional fabric as a prefabricated body, the carbon matrix is ​​introduced through chemical vapor infiltration (CVI) and liquid phase impregnation-pyrolysis (PIP) processes to prepare a carbon-based composite material blank with a density of 1.40g / cm3.

[0069] 2) Put the carbon-based composite material blank prepared in step (1) into the impregnation reaction kettle, and vacuumize at room temperature to make the pressure in the kettle reach 10 3 Pa, then the polyamic acid resin B (chemical structural formula as shown in formula II) with a solid content of 38% is introduced into the still, and the blank is impregn...

Embodiment 3

[0072] Example 3 Preparation of carbon fiber three-dimensional fabric reinforced polyimide-carbon-based binary matrix composite (PI-C / CF)

[0073] In this implementation case, a method for preparing a carbon fiber three-dimensional fabric reinforced polyimide-carbon-based binary matrix composite material includes the following steps:

[0074] 1) Using carbon fiber three-dimensional fabric as a prefabricated body, the carbon matrix is ​​introduced through chemical vapor infiltration (CVI) and liquid phase impregnation-pyrolysis (PIP) processes to prepare a carbon-based composite blank with a density of 1.45g / cm3.

[0075] 2) Put the carbon-based composite material blank prepared in step (1) into the impregnation reaction kettle, and vacuumize at room temperature to make the pressure in the kettle reach 10 2 Pa, then the polyamic acid resin C (chemical structural formula as shown in formula III) that solid content is 35% is imported in the still, impregnates blank 0.5h; Subseq...

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Abstract

The invention relates to a carbon fiber three-dimensional fabric enhanced polyimide-carbon based dual substrate composite material (PI-C / CF) which comprises carbon fiber three-dimensional fabric prefabricated bodies, carbon substrates and polyimide resin substrates. The carbon fiber three-dimensional fabric enhanced polyimide-carbon based dual substrate composite material prepared according to theembodiment has the advantages of excellent high-temperature resistance and excellent wear-resistant performance; the friction coefficient is small; the material belongs to a high-intensity high-temperature-resistant wear-resistant novel composite material, and the requirement in the fields of military science, aerospace and the like on the high-temperature wear-resistant structure element materials can be met.

Description

technical field [0001] The invention relates to the preparation of a carbon fiber three-dimensional fabric reinforced polyimide-carbon-based binary matrix composite material, and belongs to the technical field of composite material preparation and performance regulation. Background technique [0002] Polyimide (PI) is a kind of polymer containing characteristic imide ring and aromatic hydrocarbon group structure on the main chain, which has good corrosion resistance, excellent mechanical strength, outstanding heat resistance and self-lubricating properties, some PI It has no obvious melting point and the thermal deformation temperature can reach 350°C. It is an important high-temperature self-lubricating and wear-resistant material in the aerospace field. At present, more fillers such as graphite, fiber and fiber woven cloth are added to PI to obtain PI-based composites with better mechanical properties and friction properties. But the important thing is that none of them c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/84C04B41/83C08L79/08C08K3/04C08K7/06
CPCC04B35/83C04B41/009C04B41/4892C04B41/83C04B2235/77C04B2235/96C08K3/04C08K7/06C08L2201/08C08L79/08
Inventor 俞鸣明张传媛方琳任慕苏孙晋良
Owner SHANGHAI UNIV
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