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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 problems such as 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: 2017-03-15
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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  • Preparation method of graphene/Fe3O4/polyaniline ternary wave-absorbing composite material
  • Preparation method of graphene/Fe3O4/polyaniline ternary wave-absorbing composite material
  • Preparation method of graphene/Fe3O4/polyaniline ternary wave-absorbing composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh graphite oxide, Fe 3 o 4 Put 0.186g of each into 150mL of deionized water, and ultrasonically disperse it fully for 30min; then transfer the above suspension into a three-necked flask, add 0.558g of aniline, and heat it in a water bath at 95°C for 4h; then cool the water bath to 0~ At 5°C, add 7.5g of acetic acid and stir for 0.5h to make the pH of the mixed system 0.

[0028] Dissolve 1.824g of ammonium persulfate in 50mL of deionized water, and then slowly add it dropwise to 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 respectively, and dried in an oven at 80° C. for 12 to 24 hours to obtain a powder material.

Embodiment 2

[0031] Weigh graphite oxide, Fe 3 o 4 Put 0.186g of each into 150mL deionized water, and ultrasonically disperse it fully for 30min; then transfer the above suspension into a three-necked flask, add 0.558g of aniline, and heat it in a water bath at 95°C for 4h; then cool the water bath to 0~ At 5°C, add 7.5g of acetic acid and stir for 0.5h to make the pH of the mixed system 4.

[0032] 2.188g of ammonium persulfate was dissolved in 50mL of deionized water, and then slowly added dropwise to the above mixed system for 1h to carry out oxidative polymerization for 24h.

[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 to 24 hours to obtain a powder material.

Embodiment 3

[0035] Weigh graphite oxide, Fe 3 o 4Put 0.186g of each into 150mL deionized water, and ultrasonically disperse it fully for 30min; then transfer the above suspension into a three-necked flask, add 0.558g of aniline, and heat in a water bath at 95°C for 4h; then cool the water bath to 0~ At 5°C, add 7.5g of acetic acid and stir for 0.5h to make the pH of the mixed system 3.

[0036] 2.736g of ammonium persulfate was dissolved in 50mL of deionized water, and then slowly added dropwise to the above mixed system for 1h to carry out oxidative polymerization for 24h.

[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 to 24 hours to obtain a powder material.

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Abstract

The invention discloses a preparation method of a graphene / Fe3O4 / polyaniline ternary wave-absorbing composite material, and relates to the technical field of ternary composite conductive material production. The method is characterized in that a process using aniline monomer to directly reduce graphene oxide is used, and the coordination interaction of the graphene oxide and Fe3O4 is used to prepare the graphene / Fe3O4 / polyaniline ternary composite material, so that the goal of greenization of the nano composite material preparation and compounding and refinement of the wave-absorbing material structure can be realized. In the composite material, polyaniline organically wraps the surface of the compound of Fe3O4 and graphene to form a specific layer-by-layer assembled structure. The specific surface area is greatly increased by the laminated graphene sheets, and more interfacial polarization and interfaces are caused by the layered structure and the core-shell structure. The prepared ternary composite material is capable of realizing impedance matching and is beneficial to the attenuation effect of electromagnetic waves by the additional interfacial polarization and multiple interfaces caused by the layer-by-layer assembled structure.

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 carbonaceous material composed of a single layer of carbon atoms. Its unique two-dimensional structure gives it unique properties. For example, adjacent carbon atoms are sp2 hybridized into bonds, and the strong σ bonds between carbon atoms in the plane make graphene have excellent mechanical properties; the large π bonds perpendicular to the plane are conducive to the conduction of free electrons, giving it excellent mechanical properties. conductivity etc. [0003] At present, graphene is generally prepared by redox method. A large number of oxygen-containing functional groups are introduced into graphite sheets through strong oxidants such as potassium permanganate and concentrated sulfuric acid, which destroys the van der Waals force between sheets and expands the distance between graphite sheets. ,...

Claims

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Application Information

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Patent Type & Authority Applications(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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