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A silicon carbide/carbon fiber reinforced composite material capable of absorbing radar waves and its preparation method

A reinforced composite material and carbon fiber technology, which is applied in the fields of fiber chemical characteristics, textiles, papermaking, non-woven fabrics, etc., can solve the problem of affecting the absorbing performance of coatings, many disadvantages, and the combination of radar wave powder materials and resins is not high. problems, to achieve the effect of good market application prospect, wide source of raw materials, and simple preparation process

Active Publication Date: 2022-05-24
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Literature research shows that radar wave absorbing materials have been extensively researched. China Invention Patent Application No. 200810092492.6 discloses a high-absorbing and lightweight electromagnetic wave absorbing material. This patent prepares coating and coating type sheet-shaped electromagnetic wave absorbers. The magnetic material in the absorbing material may not be evenly distributed in the base material, which affects the absorbing performance of the coating
China Invention Patent Application No. 201810120151.9 discloses camouflage grass capable of radar stealth and near-infrared stealth and its preparation method. The patent uses radar wave powder to realize radar stealth; the disadvantage is that the distribution of radar wave powder material is not easy to be uniform, and the radar wave The combination of powder material and resin is not strong
Aiming at the weakness that most radar wave absorbing materials are powder materials, but powder materials have many disadvantages, the present invention proposes a new solution

Method used

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  • A silicon carbide/carbon fiber reinforced composite material capable of absorbing radar waves and its preparation method
  • A silicon carbide/carbon fiber reinforced composite material capable of absorbing radar waves and its preparation method
  • A silicon carbide/carbon fiber reinforced composite material capable of absorbing radar waves and its preparation method

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Embodiment 1

[0034] In this embodiment, a method for preparing a silicon carbide / carbon fiber reinforced composite material with radar wave absorption includes the following steps:

[0035] (1) Preparation of silicon carbide ceramic fibers: under a helium atmosphere, 10 mL of dimethyldichlorosilane and 30 g of molten sodium were added to 150 mL of toluene solvent, and the reaction was stirred. The reaction temperature was 85 °C and the reaction time was 4 hours. After the end, stand for stratification, take the upper layer solution to obtain polydimethylsilane; add polydimethylsilane to the autoclave, raise the temperature to 450° C., set the pressure to 14MPa, and set the reaction time to 11 hours to obtain the polydimethylsilane. Carbosilane; dissolving polycarbosilane in xylene to obtain spinning solution; entering the spinning solution into the spinning system for spinning, and the spun yarn is washed, oiled, and dried to obtain yarn; under nitrogen atmosphere , sintering the wire at 1...

Embodiment 2

[0048] In this embodiment, a method for preparing a silicon carbide / carbon fiber reinforced composite material with radar wave absorption includes the following steps:

[0049] (1) Preparation of silicon carbide ceramic fibers: under a helium atmosphere, 10 mL of dimethyldichlorosilane and 20 g of molten sodium were added to 100 mL of toluene solvent, and the reaction was stirred. The reaction temperature was 80 °C and the reaction time was 3 hours. After finishing, stand for layering, take the upper layer solution to prepare polydimethylsilane; add polydimethylsilane to the autoclave, heat up to 400° C., set the pressure to 12MPa, and set the reaction time to 10 hours to prepare polydimethylsilane. Carbosilane; dissolving polycarbosilane in xylene to obtain spinning solution; entering the spinning solution into the spinning system for spinning, and the spun yarn is washed, oiled, and dried to obtain yarn; under nitrogen atmosphere , sintering the threads at 1300°C for 8 hours...

Embodiment 3

[0062] In this embodiment, a method for preparing a silicon carbide / carbon fiber reinforced composite material with radar wave absorption includes the following steps:

[0063] (1) Preparation of silicon carbide ceramic fibers: under a helium atmosphere, 10 mL of dimethyldichlorosilane and 40 g of molten sodium were added to 200 mL of toluene solvent, and the reaction was stirred. The reaction temperature was 90 °C and the reaction time was 5 hours. After the end, stand for stratification, take the upper layer solution to obtain polydimethylsilane; add polydimethylsilane to the autoclave, heat up to 500° C., set the pressure to 16MPa, and set the reaction time to 12 hours to obtain polydimethylsilane. Carbosilane; dissolving polycarbosilane in xylene to obtain spinning solution; entering the spinning solution into the spinning system for spinning, and the spun yarn is washed, oiled, and dried to obtain yarn; under nitrogen atmosphere , sintering the threads at 1500°C for 12 ho...

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Abstract

The invention relates to a silicon carbide / carbon fiber reinforced composite material capable of absorbing radar waves and a preparation method thereof. In the present invention, polycarbosilane is dissolved in xylene for spinning, washed with water, oiled and dried to obtain silk thread; under nitrogen atmosphere, the silk thread is sintered at high temperature to obtain silicon carbide ceramic fiber; then, rice straw is used as raw material to extract Among them, the cellulose fibers are processed by pre-oxidation, pre-carbonization, carbonization and other processes to obtain carbon fibers; silicon carbide fibers and carbon fibers are combined to obtain silicon carbide / carbon fiber composite fiber mats; finally, polyphenylene sulfide particles are combined with The silicon carbide / carbon fiber composite fiber mat is mixed by a hot press to prepare a silicon carbide / carbon fiber reinforced composite material with radar wave absorption. The silicon carbide / carbon fiber reinforced composite material prepared by the invention exhibits obvious radar wave-absorbing performance, has a simple preparation process, has wide sources of raw materials, and has good market application prospects in the military field.

Description

technical field [0001] The invention belongs to the technical field of preparation of composite materials, in particular to a silicon carbide / carbon fiber reinforced composite material capable of absorbing radar waves and a preparation method thereof. Background technique [0002] At present, with the increasingly fierce military competition in the world, the development of modern information-based military technology has put forward higher requirements for the self-protection ability of weapons. Some weapons with stealth functions have been continuously developed. Among these weapons, radar waves absorb Materials are widely used. [0003] There are many kinds of radar wave absorbing materials, mainly including ferrite materials, nanomaterials and fiber materials. Among these materials, ferrite materials are usually used as coating materials for the surface of the aircraft to achieve stealth. However, the coating materials are prone to rust when exposed to rain. In addition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/02C08K7/06C08K7/10D01F9/10D01F9/16D04H1/4209D04H1/4242
CPCC08K7/06C08K7/10D01F9/10D01F9/16D04H1/4209D04H1/4242C08L81/02
Inventor 彭雄义王慧鹏张延陈卓董雄伟刘仰硕吕少仿梁永红蔡映杰王强杨锋
Owner WUHAN TEXTILE UNIV
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