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Composite material taking carbon fiber/polyimide fiber hybrid fabric as enhancing body and preparation method thereof

A technology of polyimide fibers and composite materials, which is applied in the field of high-strength, high-temperature-resistant composite materials, and high toughness, and can solve problems such as poor toughness and impact resistance, low water absorption, low density, and dielectric insulation properties , to achieve the effect of improving toughness and impact resistance, improving toughness and impact resistance, and improving insulation performance

Active Publication Date: 2018-03-13
JIANGSU XIANNUO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of poor toughness and impact resistance of carbon fiber composite materials in the prior art, and to provide a composite material with carbon fiber / polyimide fiber hybrid fabric as the reinforcing body and its preparation method
Compared with glass fiber, the fiber has lower density and dielectric insulation properties; compared with aramid fiber, the fiber can withstand higher service temperature, and also has better UV radiation resistance and low The water absorption rate effectively solves the problem of poor moisture and heat aging resistance of the composite material caused by the high water absorption rate of the aramid fiber and the inability to withstand ultraviolet radiation.

Method used

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  • Composite material taking carbon fiber/polyimide fiber hybrid fabric as enhancing body and preparation method thereof

Examples

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Effect test

preparation example 1

[0039] The preparation method of thermosetting polyimide resin solution: 4-phenylethynyl phthalic anhydride (PEPA) and a-type biphenyltetracarboxylic dianhydride (a-BPDA) and a small amount of 2,2-bis[4-(3,4 -dicarboxyphenoxy) phenyl] hexafluoropropane dianhydride (BFDA) and ethanol were refluxed at 70°C to obtain the three esterified solutions A, B and C respectively, and p-phenylenediamine ( p-PDA) and 2,2'-bis[4-(4-aminophenoxy)phenyl]propane (BAPP) and 3,4-diaminodiphenyl ether (3,4-ODA) were dissolved in ethanol solution Solution D was obtained in , and solutions A, B and C were mixed with solution D under the condition of nitrogen protection, and the stirring reaction was continued for 2 hours to obtain a polyimide resin solution.

preparation example 2

[0041] The preparation method of thermoplastic polyimide resin: add bisphenol A type diether dianhydride (BPDEDA) and hexafluorotetracarboxylic dianhydride (6FDA) and 3,4-ODA and a small amount of p-PDA into a high boiling point solvent (N- Methylpyrrolidone NMP), polymerize at 190°C for 12h, then add catalyst isoquinoline (the mole is 5% of the mole of dianhydride), continue to polymerize at 190°C for 24h, then cool to At room temperature, the solution was poured into deionized water to precipitate, filtered and dried to obtain thermoplastic polyimide powder.

Embodiment 1

[0043] (1) Take the high-performance polyimide fiber (strength 2.5GPa, modulus 80GPa, elongation 3.5%) of 3K tow as the weft direction, take the T300 carbon fiber of 3K tow as the radial direction, and take plain weave The process obtains a fiber cloth mixed with the two, and the surface density of the fiber cloth is 180g / m 2 ;

[0044] (2) The fiber cloth obtained in step (1) is fully infiltrated with a hot roller (80°C) and an epoxy resin film to obtain a fiber cloth prepreg, and the glue amount is 120g / m 2 ;

[0045] (3) Lay up the prepreg obtained in step (2) (20 layers), and then put it into the mold. After preforming with a vacuum bag, pre-cure at 100°C for 3 hours under a pressure of 6MPa, and then cure at 180°C for 3 hours. Forming to obtain composite material S1.

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Abstract

The invention provides a composite material taking a carbon fiber / polyimide fiber hybrid fabric as the enhancing body and a preparation method thereof. The composite material is prepared by spinning or weaving carbon fibers and polyimide fibers to obtain carbon fiber / polyimide fiber hybrid fabrics; and then compounding carbon fiber / polyimide fiber hybrid fabrics with a filling material to obtain the composite material. Polyimide fibers are taken as one of the main materials of the enhanced body, the problem that the composite material is very fragile when only carbon fibers are taken as the enhancing body is solved, on the premise that the mechanical strength of the composite material is not influenced; and moreover, the impact resistant performance and the insulation property of the composite material are greatly improved. The composite material can be used to produce bulletproof clothes, bulletproof bags, bulletproof armoring, bulletproof guard boards, bulletproof helmets, safety helmets, collision resistant walls, collision resistant protective boards, bumpers, brake discs, grinding wheels, friction materials, and the like. Furthermore, the composite material can be used to enhance and reinforce bridges and buildings.

Description

technical field [0001] The invention relates to the field of preparation of high-strength, high-toughness, and high-temperature-resistant composite materials, in particular to a method for preparing a composite material in which a carbon fiber / polyimide fiber hybrid fabric is used as a reinforcing body, and the composite material prepared by the method. Background technique [0002] Carbon fiber composite materials are known for their light weight, high strength and high modulus, and high temperature resistance. They are important basic materials for the development of national defense, aerospace, new energy and high-tech industries. However, although carbon fiber has the above performance advantages, it is brittle and has certain limitations in applications such as bulletproof materials, anti-collision materials and wave-transparent materials considering toughness and impact resistance. Therefore, composite materials prepared using it usually require Only by choosing the ap...

Claims

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Application Information

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IPC IPC(8): C08L63/00D01F8/16D01F8/18C08L79/08C08L61/16C08K7/06D03D15/00B29C70/34B29C70/44B29C70/48D03D15/275D03D15/283D03D15/47D03D15/573
CPCD03D15/00C08L61/16C08L63/00C08L79/08B29C70/342B29C70/44B29C70/48C08L2205/16C08L2205/025C08L2201/08C08K7/06
Inventor 武德珍韩恩林于文骁陈金梅牛鸿庆俞建刚
Owner JIANGSU XIANNUO NEW MATERIAL TECH
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