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A ferrocene-based chiral poly-Schiff base salt/graphene composite wave-absorbing material

A graphene composite and ferrocene-based technology, which is applied in the field of microwave-absorbing materials, can solve the problems of electrolyte environmental pollution, low absorption strength, and high-quality ferrite, and achieve excellent microwave-absorbing effects, simple preparation, and strong wave effect

Active Publication Date: 2017-03-15
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 loss 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 band below -5dB is 6.08GHz, and the maximum attenuation can reach -17.2dB. The main disadvantage is that the absorption strength is not high and ferrite has high quality as a wave-absorbing material Disadvantages of large and dense

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add 0.04 mol of ferrocene formaldehyde into 43 ml of absolute ethanol, stir and dissolve, and raise the temperature to 50° C. under reflux to obtain a ferrocene formaldehyde solution.

[0022] (2) Dissolve 0.02mol of chiral (R)-1,2-propylenediamine in 15ml of absolute ethanol; slowly drop the chiral (R)-1,2-propylenediamine solution into the ferrocene formaldehyde solution After dropping within 30 minutes, the solution was stirred and refluxed under nitrogen protection at 50° C. for 5 hours to obtain solution A.

[0023] (3) The solution A was filtered, and the resulting filter cake was vacuum-dried at 40° C. for 12 hours to obtain a ferrocenyl chiral (R)-1,2-propanediamine bis-Schiff base.

[0024] (4) Dissolve 0.01mol of ferrocenyl chiral (R)-1,2-propanediamine bis-Schiff base in 14mL of chloroform, heat up to 60°C under reflux conditions, and dissolve 0.01mol of Dissolve formyl chloride and 0.05mol aluminum trichloride in 30mL chloroform and 30mL nitrobenzene re...

Embodiment 2

[0032] (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.

[0033] (2) Dissolve 0.03mol of chiral (R)-1,2-propylenediamine in 22ml of absolute ethanol; slowly drop the chiral (R)-1,2-propylenediamine solution into the ferrocene formaldehyde solution After dropping within 30 minutes, the solution was stirred and refluxed under nitrogen protection at 50° C. for 5 hours to obtain solution A.

[0034] (3) The solution A was filtered, and the resulting filter cake was vacuum-dried at 40° C. for 12 hours to obtain a ferrocenyl chiral (R)-1,2-propanediamine bis-Schiff base.

[0035] (4) Dissolve 0.02mol of ferrocenyl chiral (R)-1,2-propanediamine bis-Schiff base in 30mL of chloroform, heat up to 60°C under reflux conditions, and dissolve 0.02mol of terephthalic Dissolve formyl chloride and 0.10mol aluminum trichloride in 30mL chloroform and 80mL ni...

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Abstract

The invention discloses a ferrocene-based chiral poly-Schiff base salt / graphene composite wave-absorbing material. First, the ferrocene-based chiral poly-Schiff-base salt and graphene are combined as a wave-absorbing medium, and a paraffin matrix is ​​added. made later. The mass ratio of ferrocene-based chiral poly-Schiff base salt to the entire composite material is 1:4~5, the mass ratio of graphene to the entire composite material is 1:10~20, and the mass ratio of the paraffin matrix to the entire composite material The ratio is 7:10. The composite material has excellent wave-absorbing performance, and has the advantages of high absorption intensity, wide absorption frequency band, simple preparation, low density and small thickness. It has broad application prospects in wave-absorbing materials, antistatic materials, electromagnetic shielding materials, etc.

Description

technical field [0001] The invention is a ferrocene-based chiral poly-Schiff base salt / graphene composite wave-absorbing material, relates to an electromagnetic wave composite wave-absorbing material and a preparation method thereof, 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, polycrystalline...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L91/06C08K3/04C08K5/56
Inventor 刘崇波李琳李恒农唐星华
Owner NANCHANG HANGKONG UNIVERSITY
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