Silicon carbide/carbon fiber reinforced composite material capable of absorbing radar waves and preparation method thereof

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 prospects, simple preparation process, and wide source of raw materials

Active Publication Date: 2020-02-21
WUHAN TEXTILE UNIV
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  • 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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  • Silicon carbide/carbon fiber reinforced composite material capable of absorbing radar waves and preparation method thereof
  • Silicon carbide/carbon fiber reinforced composite material capable of absorbing radar waves and preparation method thereof
  • Silicon carbide/carbon fiber reinforced composite material capable of absorbing radar waves and preparation method thereof

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Effect test

Embodiment 1

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

[0035] (1) Preparation of silicon carbide ceramic fiber: In a helium atmosphere, add 10mL dimethyldichlorosilane and 30g molten sodium to 150mL toluene solvent, stir and react, the reaction temperature is 85 ° C, the reaction time is 4 hours, the reaction After the end, stand for stratification, take the upper layer solution to obtain polydimethylsilane; add polydimethylsilane to the high-pressure reactor, raise the temperature to 450°C, set the pressure to 14MPa, and the reaction time is 11 hours to obtain polydimethylsilane Carbosilane; polycarbosilane is dissolved in xylene to obtain spinning solution; the spinning solution is entered into the spinning system for spinning, and the spun silk is washed, oiled and dried to obtain silk; under nitrogen atmosphere , and sintered the wire at 1400°C for 10 hours to p...

Embodiment 2

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

[0049] (1) Preparation of silicon carbide ceramic fiber: In a helium atmosphere, add 10mL dimethyldichlorosilane and 20g molten sodium to 100mL toluene solvent, stir and react, the reaction temperature is 80°C, and the reaction time is 3 hours. After the end, stand for stratification, take the upper layer solution to obtain polydimethylsilane; add polydimethylsilane to the high-pressure reactor, raise the temperature to 400°C, set the pressure to 12MPa, and the reaction time is 10 hours to obtain polydimethylsilane Carbosilane; polycarbosilane is dissolved in xylene to obtain spinning solution; the spinning solution is entered into the spinning system for spinning, and the spun silk is washed, oiled and dried to obtain silk; under nitrogen atmosphere , sintering silk threads at 1300° C. for 8 hours to prepare Si...

Embodiment 3

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

[0063] (1) Preparation of silicon carbide ceramic fiber: In a helium atmosphere, add 10mL dimethyldichlorosilane and 40g molten sodium to 200mL toluene solvent, stir and react, the reaction temperature is 90 ° C, the reaction time is 5 hours, the reaction After the end, stand for stratification, take the upper layer solution to obtain polydimethylsilane; add polydimethylsilane to the high-pressure reactor, raise the temperature to 500°C, set the pressure to 16MPa, and the reaction time is 12 hours to obtain polydimethylsilane Carbosilane; polycarbosilane is dissolved in xylene to obtain spinning solution; the spinning solution is entered into the spinning system for spinning, and the spun silk is washed, oiled and dried to obtain silk; under nitrogen atmosphere , sintering silk threads at 1500°C for 12 hours to ...

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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. The preparation method comprises the steps: dissolving polycarbosilane in xylene, spinning, washing with water, oiling, and drying to obtain silk yarns; sintering the silk yarns at a high temperature in a nitrogen atmosphere to obtain silicon carbide ceramic fibers; then, taking rice straw as a raw material, extracting cellulose fibers in the rice straw, and carrying out pre-oxidation, pre-carbonization, carbonization and other process treatment on the cellulose fibers to obtain carbon fibers; compounding the silicon carbide fibers and the carbon fibers to prepare a silicon carbide / carbon fiber composite fiber felt; and finally, mixing polyphenylene sulfide particles and the silicon carbide / carbon fiber composite fiber felt through a hot press, and thus obtaining the silicon carbide / carbon fiber reinforced composite material capable ofabsorbing radar waves. The prepared silicon carbide / carbon fiber reinforced composite material shows obvious radar wave-absorbing performance, is simple in preparation process and wide in raw material source, and has a good market application prospect in the military field.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates 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 capabilities 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, the ferrite material is usually applied as a coating material to the surface of the aircraft to achieve stealth. However, the coating material is easy to rust when exposed to ra...

Claims

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Application Information

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Patent Type & Authority Applications(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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