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Ferrocenyl chiral poly schiff base salt/graphene composite wave absorbing material

A composite wave-absorbing material and graphene composite technology, applied in the field of wave-absorbing materials, can solve problems such as low absorption strength, electrolyte pollution, and high density, and achieve the effects of simple preparation, strong wave-absorbing performance, and low density

Active Publication Date: 2015-10-28
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material has strong electromagnetic wave absorption in the low frequency band, and can reach a maximum attenuation of -32dB at 6.7GHz, but its absorption frequency band higher than -5dB is less than 2GHz, and the frequency band is narrow. will cause some pollution
When the thickness is 1.5mm, it is at 8-18GHz, but its absorption frequency band below -5dB is 6.08 GHz, and the maximum attenuation of Z can reach -17.2dB. As a wave-absorbing material, ferrite has the disadvantage of high density, and at the same time absorbs strong not tall

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add 0.02 mol of ferrocene formaldehyde into 20 ml of absolute ethanol, stir and dissolve, and raise the temperature to 50°C under reflux to obtain a ferrocene formaldehyde solution.

[0025] (2) Dissolve 0.01mol of chiral (R,R)-1,2-cyclohexanediamine in 10ml of absolute ethanol; slowly drop the chiral (R,R)-1,2-cyclohexanediamine solution Put it into the ferrocene formaldehyde solution, drop it within 30 minutes, and then react under nitrogen protection at 50°C for 5 hours under reflux under nitrogen protection to obtain solution A.

[0026] (3) The solution A was filtered, and the obtained filter cake was vacuum-dried at 40° C. for 12 hours to obtain a ferrocenyl chiral bis-Schiff base.

[0027] (4) Dissolve 0.005mol of ferrocenyl chiral bis-Schiff base in 15mL of chloroform, and heat up to 60°C under reflux conditions to obtain solution B; dissolve 0.04mol of aluminum trichloride in 50mL of chloroform , drop 5 ml of chloroform solution containing 0.005 mol of adi...

Embodiment 2

[0034] (1) Add 0.06 mol of ferrocene formaldehyde into 65 ml of absolute ethanol, stir and dissolve, and raise the temperature to 50°C under reflux to obtain a ferrocene formaldehyde solution.

[0035] (2) Dissolve 0.03mol of chiral (R,R)-1,2-cyclohexanediamine in 35ml of absolute ethanol; slowly drop the chiral (R,R)-1,2-cyclohexanediamine solution Put it into the ferrocene formaldehyde solution, drop it within 30 minutes, then under nitrogen protection at 50°C, stir and reflux for 5 hours to obtain solution A.

[0036] (3) The solution A was filtered, and the resulting filter cake was vacuum-dried at 40°C for 12 hours to obtain a ferrocene-based chiral (R,R)-1,2-cyclohexanediamine bis-Schiff base.

[0037] (4) Dissolve 0.01mol of ferrocenyl chiral bis-Schiff base in 25mL of chloroform, heat up to 60°C under reflux conditions to obtain solution B; dissolve 0.08mol of aluminum trichloride in 50mL of nitrobenzene 20 ml of chloroform solution containing 0.01 mol of terephthaloy...

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Abstract

The invention discloses a ferrocenyl chiral poly schiff base salt / graphene composite wave absorbing material. Firstly, ferrocenyl chiral poly schiff base salt and graphene are combined as a wave absorbing medium, and then paraffin base is added into the wave absorbing medium to obtain the ferrocenyl chiral poly schiff base salt / graphene composite wave absorbing material. The mass ratio between the ferrocenyl chiral poly schiff base salt and the whole composite material is 1:4-5, the mass ratio between the graphene and the whole composite material is 1:10-20, and the mass ratio between the paraffin base and the whole composite material is 7:10. The composite wave absorbing material is easy to prepare, has the advantages of being light, thin in thickness, excellent in wave absorbing performance and the like, and has wide application prospects in the aspects of hiding, static electricity resistance, electromagnetic shielding and the like.

Description

technical field [0001] The invention is a ferrocene-based chiral poly-Schiff base salt / graphene composite wave-absorbing material and a preparation method thereof, relates to an electromagnetic wave composite wave-absorbing material, in particular provides a radar stealth composite material, which belongs to wave-absorbing field of materials technology. 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 wave-absorbing materials mainly include: ferrite, metal powder, semiconductor materials, conductive polymers, carbon black, polycrystalli...

Claims

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Application Information

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IPC IPC(8): C08L79/00C08K3/04C09K3/00
CPCC08K3/04C09K3/00C08L79/00
Inventor 刘崇波李琳李恒农
Owner NANCHANG HANGKONG UNIVERSITY
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