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A preparation method of graphene/fe3o4/polyaniline ternary wave-absorbing composite material

A composite material and graphene technology, which is applied in the production field of ternary composite conductive materials, can solve the problems of low magnetic permeability, poor impedance matching, and high complex permittivity, so as to improve impedance matching, realize impedance matching, increase The effect of specific surface area

Active Publication Date: 2018-10-16
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although pure polyaniline has the characteristics of high conductivity, low density, and good environmental stability, it has high complex permittivity, low magnetic permeability, and poor impedance matching.

Method used

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  • A preparation method of graphene/fe3o4/polyaniline ternary wave-absorbing composite material
  • A preparation method of graphene/fe3o4/polyaniline ternary wave-absorbing composite material
  • A preparation method of graphene/fe3o4/polyaniline ternary wave-absorbing composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh graphite oxide and Fe first 3 O 4 0.186g each was put into 150mL deionized water, ultrasonic for 30min to make it fully dispersed; secondly, the above suspension was transferred into a three-necked flask, and then 0.558g aniline was added and heated in a 95℃ water bath for 4h; then the water bath was cooled to 0~ At 5°C, add 7.5 g of acetic acid and stir for 0.5 h to make the pH of the mixed system 0.

[0028] 1.824g of ammonium persulfate was dissolved in 50mL of deionized water, and then slowly dropped into the above mixed system for 1h to carry out oxidative polymerization for 24h.

[0029] Finally, the prepared graphene / Fe 3 O 4 The / PANI composite material was washed and centrifuged with ethanol and distilled water, and dried in an oven at 80°C for 12-24 hours to obtain powder materials.

Embodiment 2

[0031] Weigh graphite oxide and Fe first 3 O 4 0.186g each was put into 150mL deionized water, ultrasonic for 30min to make it fully dispersed; secondly, the above suspension was transferred to a three-necked flask, and 0.558g aniline was added, and heated in a 95℃ water bath for 4 hours; then the water bath was cooled to 0~ At 5°C, add 7.5 g of acetic acid and stir for 0.5 h to make the pH value of the mixed system 4.

[0032] Dissolve 2.188 g of ammonium persulfate in 50 mL of deionized water, and then slowly add dropwise to the above mixed system for 1 hour for oxidative polymerization for 24 hours.

[0033] Finally, the prepared graphene / Fe 3 O 4 The / PANI composite material was washed with ethanol and distilled water, centrifuged, and dried at 80°C for 12-24 hours to obtain powder materials.

Embodiment 3

[0035] Weigh graphite oxide and Fe first 3 O 4 0.186g each was put into 150mL deionized water, ultrasonic for 30min to make it fully dispersed; secondly, the above suspension was transferred to a three-necked flask, and 0.558g aniline was added, and heated in a 95℃ water bath for 4 hours; then the water bath was cooled to 0~ At 5°C, add 7.5 g of acetic acid and stir for 0.5 h to make the pH of the mixed system 3.

[0036] Dissolve 2.736 g of ammonium persulfate in 50 mL of deionized water, and then slowly add dropwise to the above mixed system for 1 hour for oxidative polymerization for 24 hours.

[0037] Finally, the prepared graphene / Fe 3 O 4 The / PANI composite material was washed with ethanol and distilled water, centrifuged, and dried at 80°C for 12-24 hours to obtain powder materials.

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Abstract

The invention discloses a method for preparing a graphene / Fe3O4 / polyaniline ternary wave-absorbing composite material, which relates to the technical field of production of ternary composite conductive materials. The invention adopts the process of directly reducing graphene oxide by aniline monomer, the coordination interaction between graphene oxide and ferric oxide, and prepares graphene / Fe3O4 / PANI ternary composite material, which realizes the greening and absorption of nanocomposite materials. The goal of compounding and refining the wave material structure. In the composite material, polyaniline is organically coated on the surface of the composite of ferric oxide and graphene, forming a unique layer-by-layer assembly structure. The layered graphene sheet greatly increases its specific surface area, while the layered structure, core-shell structure causes more interfacial polarization and interfaces. The prepared ternary composite material can realize impedance matching, and at the same time, the additional interface polarization and multiple interfaces caused by the layer-by-layer assembly structure are beneficial to the attenuation effect of electromagnetic waves.

Description

Technical field [0001] The invention relates to the technical field of production of ternary composite conductive materials. Background technique [0002] Graphene is a new carbon material composed of a single layer of carbon atoms. Its unique two-dimensional structure gives it unique properties. For example, adjacent carbon atoms are hybridized with sp2 to form bonds, and the strong σ bonds between the carbon atoms in the plane make graphene have excellent mechanical properties; the large π bonds perpendicular to the plane are beneficial to the conduction of free electrons and give it excellent Conductivity, etc. [0003] At present, graphene is generally prepared by oxidation-reduction method. A large number of oxygen-containing functional groups are introduced into the graphite flakes through strong oxidants such as potassium permanganate and concentrated sulfuric acid, which destroys the van der Waals force between the flakes and enlarges the distance between the graphite flak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02C08K9/10C08K9/04C08K3/04C08K3/22
CPCC08G73/0266C08K3/04C08K3/22C08K9/04C08K9/10C08K2003/2275
Inventor 朱爱萍史萍萍
Owner YANGZHOU UNIV
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