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Film-like CoFe2O4/graphene type wave-absorbing material and preparation method and application thereof

A wave absorbing material, graphene technology, applied in the direction of magnetic field/electric field shielding, electrical components, etc., can solve the problems of large reflection loss value, no effective absorption bandwidth, shortage, etc., achieve good broadband characteristics, and enhance high-frequency interface polarity. The ability of sintering and dielectric loss, the effect of low cost

Active Publication Date: 2018-11-06
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And Lv et.al mentioned in the review that pure graphene and MnFe 2 o 4 There is no effective absorption bandwidth, and the maximum reflection loss value is less than -10dB (J.Mater.Chem.C.5,491-522(2017))

Method used

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  • Film-like CoFe2O4/graphene type wave-absorbing material and preparation method and application thereof
  • Film-like CoFe2O4/graphene type wave-absorbing material and preparation method and application thereof
  • Film-like CoFe2O4/graphene type wave-absorbing material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A film-like CoFe 2 o 4 A method for preparing a graphene type wave-absorbing material, comprising the steps of:

[0033] Step 1: Weigh 10 mg of graphene, 1 mmol of cobalt acetoacetate and 2 mmol of iron acetoacetate respectively, place them in a three-necked flask, add 80 mL of ethylene glycol into the flask to obtain an initial solution, and mechanically stir the solution for 30 minutes.

[0034] Step 2, heating the solution obtained in step 1 to carry out organic thermal decomposition reaction, the required temperature for the reaction is 100° C., and the reaction time is 16 hours; and the whole reaction is refluxed and carried out in a nitrogen atmosphere.

[0035]Step 3, after the reaction described in step 2 is completed, filter with distilled water and isopropanol, wash 3 times, and dry after washing to obtain the desired precursor product, (that is, the film-like metal oxide precursor is supported on graphite ene sheet structure).

[0036] In step 4, the precu...

Embodiment 2

[0038] A film-like CoFe 2 o 4 / The preparation method of graphene type wave-absorbing material, comprises the steps:

[0039] Step 1: Weigh 10 mg of graphene, 2 mmol of cobalt acetoacetate and 4 mmol of iron acetoacetate respectively, place them in a three-necked flask, add 90 mL of ethylene glycol into the flask to obtain an initial solution, and mechanically stir the solution for 40 min.

[0040] Step 2, heating the solution obtained in step 1 to carry out organic thermal decomposition reaction, the required temperature for the reaction is 120° C., and the reaction time is 20 h; and the whole reaction is refluxed and carried out in a nitrogen atmosphere.

[0041] Step 3, after the reaction described in step 2 is completed, filter with distilled water and isopropanol, wash 5 times, and dry after washing to obtain the desired precursor product.

[0042] In step 4, the precursor product described in step 3 is subjected to heat treatment in a nitrogen environment to obtain the...

Embodiment 3

[0045] A film-like CoFe 2 o 4 A method for preparing a graphene type wave-absorbing material, comprising the steps of:

[0046] Step 1: Weigh 10 mg of graphene, 3 mmol of cobalt acetoacetate and 6 mmol of iron acetoacetate respectively, place them in a three-necked flask, add 100 mL of ethylene glycol into the flask to obtain an initial solution, and mechanically stir the solution for 60 min.

[0047] Step 2, heating the solution obtained in step 1 to carry out organic thermal decomposition reaction, the required temperature for the reaction is 130° C., and the reaction time is 24 hours; and the whole reaction is refluxed and carried out in a nitrogen atmosphere.

[0048] Step 3, after the reaction described in step 2 is completed, filter with distilled water and isopropanol, wash 3 times, and dry after washing to obtain the desired precursor product.

[0049] In step 4, the precursor product described in step 3 is subjected to heat treatment in a nitrogen environment to obt...

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Abstract

The invention belongs to the technical field of the electromagnetic wave-absorbing material, and specifically relates to the film-like CoFe2O4 / graphene type wave-absorbing material and a preparation method and application thereof. The method comprises the following steps: dissolving the cobalt acetoacetate (Co(acac)2) and ferric acetoacetate (Fe(acac)3) into ethylene glycol to acquire solving liquid, and then loading the solving liquid on the graphene through organic thermal decomposition; and then acquiring the film-like CoFe2O4 / graphene type wave-absorbing material through thermal treatment.The process disclosed by the invention is simple in process, short in preparation period, and large in yield. The film-like CoFe2O4 / graphene absorbing solvent prepared through the method has good dielectric loss capacity and the broadband absorbing performance.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave-absorbing materials, in particular to a film-like CoFe 2 o 4 / Graphene type absorbing material and its preparation method and application. Background technique [0002] With the rapid development of wireless technology, people began to gradually realize the seriousness of electronic pollution, which is mainly reflected in the invisible damage to human health and the interference to some high-precision electronic equipment. Elimination of electromagnetic pollution has reached the point of no delay. At present, searching for high-performance electromagnetic absorbers is an important means to solve the current electromagnetic pollution. At present, the most effective way is to optimize and enhance the electromagnetic absorption performance by selecting appropriate components and powerful microscopic morphology. Appropriate components usually refer to the combination of multiple effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
CPCH05K9/0081
Inventor 吴广磊周新峰冯爱玲贾梓睿杨庆利赵修松
Owner QINGDAO UNIV
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