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Carbon nano tube-doped poly-schiff base/ carbonyl iron powder composite stealth material

A technology of carbon nanotubes and carbonyl iron powder, which is applied in the field of carbon nanotube doped poly-Schiff base/carbonyl iron powder composite stealth materials, can solve the problems of general wave-absorbing effect, narrow wave-absorbing frequency band, narrow frequency band, etc., and achieve Good microwave absorption effect, wide absorption frequency band, and light weight effect

Inactive Publication Date: 2012-09-19
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The publication number is CN200510060803.7, which is a Chinese patent document titled an electromagnetic wave absorbing material, which discloses a polymer composite material compounded by blending a polymer matrix and an electromagnetic wave absorbing agent, and its composite effect is better than that of a single The material is good, but the best performance is that it can achieve a reflectivity above -8dB in the range of 8-10GHz, and the absorbing effect is general and the absorbing frequency band is narrow; the publication number is CN101853727A, which is called an iron-carbon nanotube composite The Chinese patent document of electromagnetic wave absorbing material and its preparation method discloses an iron-carbon nanotube composite electromagnetic wave absorbing material, which is characterized in that nano-scale C is wrapped on the outside of iron nanoparticles to form a C film. Strong electromagnetic wave absorption, but its shortcomings are also obvious, mainly because of its thicker, narrower frequency band and higher density

Method used

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  • Carbon nano tube-doped poly-schiff base/ carbonyl iron powder composite stealth material
  • Carbon nano tube-doped poly-schiff base/ carbonyl iron powder composite stealth material
  • Carbon nano tube-doped poly-schiff base/ carbonyl iron powder composite stealth material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Dissolve 0.2 mol p-phenylenediamine and 0.2 mol glyoxal in 300 ml ethanol solution, then add 10.6 g carbon nanotubes, and react with electromagnetic stirring at 50° C. for 8 h. The resulting product was filtered under reduced pressure, rinsed with ethanol for 2 to 3 times, dried and sintered at 300°C for 2 to 4 hours to obtain carbon nanotube-doped poly-Schiff base; Carbonyl iron powder mixed with 16.7g of carbonyl iron powder evenly to obtain carbon nanotube doped poly-Schiff base / carbonyl iron powder composite stealth material, wherein the carbonyl iron powder preferably has an average particle size of less than 3.5um. The composite stealth material is composed of carbon nanotubes: 11%, poly-Schiff base: 27%, and the rest is carbonyl iron powder. The composite cloaking material powder is blended with paraffin wax to prepare a compound, the composite cloaking material accounts for 50% by weight of the whole compound, and the rest is paraffin wax. The composite is coat...

Embodiment 2

[0022] 0.2 mol p-phenylenediamine and 0.2 mol glyoxal were dissolved in 300 ml ethanol solution, then 7.5 g carbon nanotubes were added, and reacted with electromagnetic stirring at 50° C. for 10 h. The resulting product was filtered under reduced pressure, rinsed with ethanol for 2 to 3 times, dried and sintered at 300°C for 2 to 4 hours to obtain carbon nanotube-doped poly-Schiff base; The carbon nanotube doped poly-Schiff base / carbonyl iron powder composite stealth material was obtained by uniformly mixing the Schiff base with 16.7 g carbonyl iron powder. Among them, the carbonyl iron powder preferably has an average particle size of less than 3.5um. The composite stealth material is composed of carbon nanotubes: 8%, poly-Schiff base: 29%, and the rest is carbonyl iron powder. The composite cloaking material powder is blended with paraffin wax to prepare a compound, the composite cloaking material accounts for 50% by weight of the whole compound, and the rest is paraffin w...

Embodiment 3

[0024] 0.2 mol p-phenylenediamine and 0.2 mol glyoxal were dissolved in 300 ml ethanol solution, then 5.28 g carbon nanotubes were added, and reacted with electromagnetic stirring at 50° C. for 10 h. The resulting product was filtered under reduced pressure, rinsed with ethanol for 2 to 3 times, dried and sintered at 300°C for 2 to 4 hours to obtain carbon nanotube-doped poly-Schiff base; The carbon nanotube doped poly-Schiff base / carbonyl iron powder composite stealth material was obtained by uniformly mixing the Schiff base with 16.7 g carbonyl iron powder. Among them, the carbonyl iron powder preferably has an average particle size of less than 3.5um. The composite stealth material is composed of carbon nanotubes: 6%, poly-Schiff base: 31%, and the rest is carbonyl iron powder. The composite cloaking material powder is blended with paraffin wax to prepare a compound, the composite cloaking material powder accounts for 50% by weight of the whole compound, and the rest is pa...

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Abstract

The invention relates to a carbon nano tube-doped poly-schiff base / carbonyl iron powder composite stealth material which is prepared by compounding a carbon nano tube, poly-schiff base and carbonyl iron powder, wherein the mass of the carbon nano tube accounts for 6-11% of the whole composite material, the mass of the poly-schiff base accounts for 27-31% of the whole composite material, and the balance of the nano carbonyl iron powder. The material has excellent microwave absorbing property, and has advantages of being wide in absorption band, low in cost, simple in preparation and low in density, thus having wide application prospect in the aspects such as microwave absorbing materials, antistatic materials, electromagnetic shielding materials and the like.

Description

technical field [0001] The invention relates to an electromagnetic wave absorbing material, in particular to a carbon nanotube-doped poly-Schiff base / carbonyl iron powder composite stealth material. Background technique [0002] Absorbing material refers to a class of materials that can effectively absorb incident electromagnetic waves and make them attenuate without reflection. It converts incident electromagnetic waves into heat energy or other energy forms through various loss mechanisms of materials to achieve the purpose of absorbing electromagnetic waves. Absorbing materials generally require high absorption, wide frequency bandwidth, light weight, and stable structural performance in the environment in which they are used. With the wide application of electronic technology, the rapid development and popularization of radio broadcasting, mobile phones, television and microwave technology, the power of radio frequency equipment has doubled, the electromagnetic radiation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/00C08K7/00C08K3/04C08K3/18C08G73/00C09D5/32
Inventor 刘崇波刘辉林徐荣臻
Owner NANCHANG HANGKONG UNIVERSITY
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