Preparation method of polypyrrole/BaFe12O19-Ni0.8Zn0.2Fe2O4/graphene nano wave-absorbing material

A technology of bafe12o19-ni0.8zn0.2fe2o4, nano-absorbing materials, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of small absorbing loss and poor absorbing performance, and achieve good absorbing performance , Broaden the microwave absorption frequency band, good compatibility effect

Inactive Publication Date: 2013-12-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology relates to making strong magnetite (magnetite) particles called iron boron oxide (α-,β)-polytrylrhizanum or barium ferrite), which are used as an absorbant material for radar systems. These composites have high electrical resistance due to their unique structure made from carbon nanotubes mixed together. They also exhibit excellent properties such as low weight, flexibility, durability, etc., resulting in improved sensitivity towards radio waves. By adding these special elements into this composition they make it more suitable than existing ones when combined alone.

Problems solved by technology

Technological Problem addressed in this patents relates to finding suitable materials that absorb waves without losing or adding too many weight compared to traditional methods like iron powder, copper flake, tantalum nitride, boron ferrimberton, and other metals. Existing techniques involve complex compositions containing different types of metal elements, but these technical problem highlighting them cannot fully meet requirements for applications where strong radiofrequency signals play important roles.

Method used

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  • Preparation method of polypyrrole/BaFe12O19-Ni0.8Zn0.2Fe2O4/graphene nano wave-absorbing material
  • Preparation method of polypyrrole/BaFe12O19-Ni0.8Zn0.2Fe2O4/graphene nano wave-absorbing material
  • Preparation method of polypyrrole/BaFe12O19-Ni0.8Zn0.2Fe2O4/graphene nano wave-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Polypyrrole / BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 Preparation of:

[0022] 1g BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 Add the nanoparticles into 200mL of deionized water, stir to make them evenly dispersed, then add 0.5mL of pyrrole monomer to the system, stir for a while, add 4.55g of FeCl 3 ·6H 2 O (2.33:1 molar ratio to pyrrole monomer) was dissolved in 100 mL of deionized water, and slowly added dropwise to the above mixed solution with a dropping funnel, and the polymerization reaction was stirred at 0°C for 12 hours. After the reaction, the resulting black solution was washed with absolute ethanol and deionized water until the filtrate was colorless, and dried in vacuum at 60°C for 24 hours to obtain PPy / BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 nanocomposites.

[0023] (2) Synthesis of polypyrrole / BaFe by mechanical reduction method 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 / graphene composites

[0024] 0.08g graphite oxide and 1.5g PPy / BaFe 12 o 19 ...

Embodiment 2

[0027] (1) Polypyrrole / BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 Preparation of:

[0028] 1g BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 Add the nanoparticles into 200mL of deionized water, stir to make them evenly dispersed, then add 0.5mL of pyrrole monomer to the system, stir for a while, add 4.55g of FeCl 3 ·6H 2 O (2.33:1 molar ratio to pyrrole monomer) was dissolved in 100 mL of deionized water, and slowly added dropwise to the above mixed solution with a dropping funnel, and the polymerization reaction was stirred at 0°C for 12 hours. After the reaction, the resulting black solution was washed with absolute ethanol and deionized water until the filtrate was colorless, and dried in vacuum at 60°C for 24 hours to obtain PPy / BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 nanocomposites.

[0029] (2) Synthesis of polypyrrole / BaFe by mechanical reduction method 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 / graphene composites

[0030] 0.2g graphite oxide and 1.5g PPy / BaFe 12 o 19 -...

Embodiment 3

[0033] (1) Polypyrrole / BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 Preparation of:

[0034] 1g BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 Add the nanoparticles into 200mL of deionized water, stir to make them evenly dispersed, then add 0.5mL of pyrrole monomer to the system, stir for a while, add 4.55g of FeCl 3 ·6H 2 O (2.33:1 molar ratio to pyrrole monomer) was dissolved in 100 mL of deionized water, and slowly added dropwise to the above mixed solution with a dropping funnel, and the polymerization reaction was stirred at 0°C for 12 hours. After the reaction, the resulting black solution was washed with absolute ethanol and deionized water until the filtrate was colorless, and dried in vacuum at 60°C for 24 hours to obtain PPy / BaFe 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 nanocomposites.

[0035] (2) Synthesis of polypyrrole / BaFe by mechanical reduction method 12 o 19 -Ni 0.8 Zn 0.2 Fe 2 o 4 / graphene composites

[0036] 0.27g graphite oxide and 1.5g PPy / BaFe 12 o 19 ...

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Abstract

The invention provides a preparation method of a polypyrrole/BaFe12O19-Ni0.8Zn0.2Fe2O4/graphene nano wave-absorbing material. Firstly a BaFe12O19-Ni0.8Zn0.2Fe2O4 material is prepared by adopting a sol-gel method, and then the polypyrrole/BaFe12O19-Ni0.8Zn0.2Fe2O4/graphene composite material is prepared by adopting an in situ oxidation method and a mechanical reduction method. The prepared polypyrrole/BaFe12O19-Ni0.8Zn0.2Fe2O4/graphene composite material has the advantages that polypyrrole, graphene with large specific area, good electrical conductivity and stable performance and a hard and soft magnetic composite material BaFe12O19-Ni0.8n0.2Fe2O4 are compounded, so that wave-absorbing property of the polypyrrole/BaFe12O19-Ni0.8Zn0.2Fe2O4/graphene composite material is enhanced; polypyrrole has the advantages of low specific gravity, good compatibility and good electrical conductivity when being taken as a wave-absorbing material; the polypyrrole/BaFe12O19-Ni0.8Zn0.2Fe2O4/graphene composite material is prepared by adopting the mechanical reduction method, and significance is produced for broadening a microwave absorption frequency band of the composite material and preparing a novel wave-absorbing material.

Description

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Claims

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Application Information

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Owner NORTHWESTERN POLYTECHNICAL UNIV
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