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Graphite-doped poly-Schiff base/carbonyl iron powder composite stealth material

A technology of polySchiff base and carbonyl iron powder is applied in wax coatings, radiation-absorbing coatings, other chemical processes, etc., to achieve the effects of light weight, wide absorption frequency band, and low preparation cost

Inactive Publication Date: 2012-09-12
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the study of poly-Schiff base composite absorbing materials in relevant literature

Method used

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  • Graphite-doped poly-Schiff base/carbonyl iron powder composite stealth material
  • Graphite-doped poly-Schiff base/carbonyl iron powder composite stealth material
  • Graphite-doped poly-Schiff base/carbonyl iron powder composite stealth material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 0.2mol of p-phenylenediamine and 0.2mol of glyoxal and dissolve them in 300ml of ethanol solution, then add 29.6g of graphite, and react with electromagnetic stirring at 50°C for 8h. 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 3 hours to obtain graphite-doped poly-Schiff base; take the above 24g graphite-doped poly-Schiff base and 42.7 g carbonyl iron powder is mixed evenly to obtain graphite-doped poly-Schiff base / carbonyl iron powder composite stealth material, wherein the average particle size of carbonyl iron powder is less than 3.5um. The composition of the composite material is graphite: 18%, poly-Schiff base: 18%, and the rest is carbonyl iron powder. The wave-absorbing material powder is blended with paraffin to prepare a composite, the powder particles account for 50% by weight of the entire composite, and the rest is paraffin. The composite is coated on a standard a...

Embodiment 2

[0018] Take 0.2mol of p-phenylenediamine and 0.2mol of glyoxal and dissolve in 300ml of ethanol solution, then add 19.7g of graphite, react under electromagnetic stirring for 8h-10h, and react under electromagnetic stirring for 9h at 50°C. 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 3 hours to obtain graphite-doped poly-Schiff base; take the above-mentioned 24g graphite-doped poly-Schiff base and 56g The carbonyl iron powder is evenly mixed to obtain a graphite-doped poly-Schiff base / carbonyl iron powder composite stealth material, wherein the average particle size of the carbonyl iron powder is less than 3.5um. The composition of the composite material is graphite: 12%, poly-Schiff base: 18%, and the rest is carbonyl iron powder. The wave-absorbing material powder is blended with paraffin to prepare a composite, the powder particles account for 50% by weight of the entire composite, and ...

Embodiment 3

[0020] Take 0.2mol of p-phenylenediamine and 0.2mol of glyoxal and dissolve in 300ml of ethanol solution, then add 14.2g of graphite, and react with electromagnetic stirring at 50°C for 10h. 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 3 hours to obtain graphite-doped poly-Schiff base; take the above 10 g of graphite-doped poly-Schiff base and 40.9 g carbonyl iron powder is mixed evenly to obtain graphite-doped poly-Schiff base / carbonyl iron powder composite stealth material, wherein the average particle size of carbonyl iron powder is less than 3.5um. The composition of the composite material is graphite: 12%, poly-Schiff base: 25%, and the rest is carbonyl iron powder. The wave-absorbing material powder is blended with paraffin to prepare a composite, the powder particles account for 50% by weight of the entire composite, and the rest is paraffin. The composite is coated on a standard...

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Abstract

The invention discloses a graphite-doped poly-Schiff base / carbonyl iron powder composite stealth material which is prepared by compounding graphite, poly-Schiff base and carbonyl iron powder. The graphite accounts for 12-19% of the whole composite material by mass, the poly-Schiff base accounts for 18-25% of the whole composite material by mass, and the balance is the carbonyl iron powder. The material has the advantages of excellent wave absorption performance, relatively wide absorption band, low cost and low density, is easy to prepare and has relatively high practical values when being used as an electromagnetic wave absorption material.

Description

technical field [0001] The invention relates to an electromagnetic wave absorbing material, in particular to a graphite-doped poly-Schiff base / carbonyl iron powder composite stealth material. Background technique [0002] Absorbing material refers to a type of material that can absorb electromagnetic wave energy projected onto its surface, and convert the electromagnetic wave energy into heat energy or other forms of energy through the dielectric loss of the material. The absorbing material generally requires high absorption, wide frequency bandwidth, and light weight. As well as the characteristics of stable structure and performance in the environment used, the commonly used absorbing materials mainly include: carbonyl iron powder, metal powder, semiconductor materials, conductive polymers, carbon black, polycrystalline iron fibers, etc. At present, traditional domestic and foreign The main goal of stealth coatings is strong absorption, and there are a large number of outs...

Claims

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Application Information

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IPC IPC(8): C09K3/00C09D191/06C09D5/32C09D7/12
Inventor 刘崇波刘辉林徐荣臻
Owner NANCHANG HANGKONG UNIVERSITY
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