Method for preparing radar wave-absorbing composite material based on carbon nanometer film

A carbon nano-film and composite material technology, applied in the field of material science, can solve the problems of difficult forming of composite materials, increased viscosity of polymer matrix, and inability of absorbing composite materials to meet engineering application requirements.

Inactive Publication Date: 2013-09-25
SHENYANG AEROSPACE UNIVERSITY
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Problems solved by technology

[0004] However, the intermolecular force of carbon nanotubes is strong, and when the amount of dispersion in the polymer matrix is ​​large, they tend to agglomerate. At the same time, the huge specific surface area of ​​carbon nanotubes will also increase the viscosity of the polymer matrix, making it difficult to form composite materials. , which affects the overall mechanical properties of the composite material, and also increases the cost
Moreover, the microwave abs

Method used

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  • Method for preparing radar wave-absorbing composite material based on carbon nanometer film

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Embodiment 1

[0025] (1) get carbon nanotube and triton-X100 and mix by 1: 10 ratio, wherein select commercially available nickel-plated multi-wall nickel-plated carbon nanotube for use, its diameter is 8-15nm, length is 50 μ m, nickel content is 60% ;

[0026] (2) Put the mixture of carbon nanotubes and anionic surface dispersant into a mortar and grind for 40min, pour into a beaker, add plasma water until the concentration of carbon nanotubes is 0.03wt%, and the concentration of surface dispersant is 0.3wt%;

[0027] (3) Pour the mixed solution into a magnetic stirrer, control the temperature below 60°C, disperse for 60 minutes, and defoam for 40 minutes;

[0028] (4) Add graphene oxide (the mass ratio of carbon nanotubes: graphene oxide is 10:1) into plasma water, prepare a solution with a concentration of 1 mg / ml, and disperse it ultrasonically for 60 minutes;

[0029] (5) The carbon nanotube / graphene oxide dispersion liquid is divided into test tubes, and then ultrasonically disperses...

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Abstract

The invention provides a method for preparing a radar wave-absorbing composite material based on a carbon nanometer film, comprising the following steps of: mixing carbon nanotubes and an anion surface dispersant, grinding the mixture in a mortar, pouring the grinded mixture into a beaker, and adding plasma water; dispersing and defoaming an obtained mixed solution in a magnetic stirrer; adding graphene oxide into plasma water to preparing a solution, and ultrasonically dispersing; mixing a carbon nanotube solution and the graphene oxide solution, centrifuging the mixture after ultrasonically dispersing by an ultrasonic cell disruption instrument, and compacting and solidifying residue after vacuum pumping filtration of a supernatant of the carbon nanotube and graphene oxide solution; heat-treating; adding a carbon nanometer film into an acetone weak solution of a resin for pre-infiltrating, and then drying; and adding the carbon nanometer filmed with layer pre-infiltration into an innermost layer of an aluminium alloy mould, laying a layer of carbon fiber/resin pre-infiltrated material in the medium, locking the mould, and molding by mould compression. A radar wave reflection rate of the radar wave-absorbing composite material based on the carbon nanometer film in a frequency range from 8GHz to 18GHz is lower than -10- -20dB.

Description

technical field [0001] The invention relates to a method for preparing a wave-absorbing composite material, in particular to a method for preparing a radar wave-absorbing composite material based on a carbon nano-film, and belongs to the field of material science and technology. Background technique [0002] As an effective means to increase the survival and air defense capabilities of modern weapon systems and improve the overall combat effectiveness, radar absorbing technology has been highly valued by the world's military powers. Radar absorbing materials mainly convert incident radar waves into heat energy through electrical loss and magnetic loss. Radar absorbers are mainly golden powder and fiber represented by ferrite. Such absorbing materials have complex processing technology, high density, and poor environmental adaptability. According to reports, F117 rarely attacks in rainy days, because moisture will degrade the performance of the absorbing material. [0003] ...

Claims

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Application Information

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IPC IPC(8): B29C70/34B29C70/54C08L63/00C08L79/08C08K7/00C08K7/06C08K3/04
Inventor 卢少微曾宪君聂鹏张春旭刘春忠高禹崔旭王继杰
Owner SHENYANG AEROSPACE UNIVERSITY
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