A kind of wave-absorbing material of carbon fiber surface coated magnetic ferrite nano carbon tube and its preparation method and application

A magnetic ferrite and surface coating technology, applied in the field of wave-absorbing materials, can solve problems such as high dielectric constant and poor impedance matching, achieve good wave-absorbing performance, simple preparation method, rich design and scientific preparation

Active Publication Date: 2020-06-19
常州翊翔炭材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings and deficiencies of the existing carbon fiber's excessively high dielectric constant and poor impedance matching, the primary purpose of the present invention is to provide a carbon fiber surface-coated magnetic ferrite nano-carbon tube absorbing material, which improves the carbon fiber surface. The absorbency of the material, broadening its absorption frequency

Method used

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  • A kind of wave-absorbing material of carbon fiber surface coated magnetic ferrite nano carbon tube and its preparation method and application
  • A kind of wave-absorbing material of carbon fiber surface coated magnetic ferrite nano carbon tube and its preparation method and application
  • A kind of wave-absorbing material of carbon fiber surface coated magnetic ferrite nano carbon tube and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 Preparation of microwave-absorbing material with carbon fiber surface-coated ferric oxide carbon nanotubes

[0039] (1) Magnetic ferroferric oxide (Fe 3 o 4 ) Preparation of nanoparticles: first add 100 mL of deionized water to a 250 mL dry three-necked round-bottomed flask, then add 1.0 g (3.6 mmol) of FeCl under nitrogen protection 3 ·6H 2 O and 0.4g (2.0mmol) FeCl 2 4H 2 O, ultrasonically disperse until the solid is completely dissolved, then add 50mL of 0.4mol / L NaOH aqueous solution drop by drop to the above reaction solution; after the drop, add 0.2g sodium oleate and react for 3.0 hours; The black solid product was washed several times with deionized water and ethanol, respectively. After drying in an ordinary oven at 80°C for 2 hours and in a vacuum oven at 50°C for 12 hours, magnetic ferric oxide nanoparticles are obtained, and the size of the particles is 5-20nm.

[0040] (2) Preparation of ferric iron tetroxide polyphosphazene nanotubes coated...

Embodiment 2

[0043] Example 2 Preparation of microwave-absorbing material of carbon fiber surface-coated ferric oxide carbon nanotubes

[0044] (1) Magnetic ferroferric oxide (Fe 3 o 4 ) Preparation of nanoparticles: see step (1) of Example 1 for details.

[0045] (2) Preparation of ferric iron tetroxide polyphosphazene nanotubes coated with carbon fiber surface: add 0.2 gram of magnetic ferric ferric oxide (Fe 3 o 4 ) nanoparticles, then add 130mL anhydrous tetrahydrofuran, ultrasonically disperse for 1.0 hour; then place 1.2 grams of carbon fiber bundles in the middle of the square frame of the polytetrafluoroethylene container (outer frame 8cm*8cm, inner frame 7cm*7cm) and immerse the above glassware In, then add 1.0 g (2.88 mmol) hexachlorocyclotriphosphazene and 2.16 g (8.64 mmol) 4,4'-dihydroxydiphenyl sulfone, ultrasonic 0.5 hour to make hexachlorocyclotriphosphazene and 4,4'- Dihydroxydiphenyl sulfone is completely dissolved, then add 3.5mL of triethylamine, take out the carbon...

Embodiment 3

[0048] Example 3 carbon fiber surface coating zinc ferrite (ZnFe 2 o 4 ) Preparation of microwave-absorbing materials for carbon nanotubes

[0049] (1) Magnetic zinc ferrite (ZnFe 2 o 4 ) Preparation of nanoparticles: first add 60mL of deionized water to a 150mL dry three-neck round-bottomed flask, then add 1.19 grams (4.0mmol) of Zn(NO 3 ) 2 ·6H 2 O and 2.33 g (8.0 mmol) Fe(NO 3 ) 3 9H 2 0, stirred until completely dissolved; then added 3.78 grams (18.0 mmol) of citric acid complexing agent, heated to 50° C. under stirring, slowly added dropwise ammonia to the above reaction solution to adjust the pH of the solution to about 3.0, so that the complexing agent was completely Dissolve; then add 7.67g of acrylamide to the above reaction solution, stir for half an hour, add 1.0g of glucose, stir and heat up to 80°C, and form a wet gel after 4 hours of reaction; put the wet gel into a common oven at 120°C to dry After 12 hours, dry in a vacuum drying oven at 80°C for 12 ho...

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Abstract

The present invention belongs to the technical field of wave absorbing materials, and discloses a wave absorbing material with magnetic ferrite carbon nano-tubes coated on the surface of carbon fibers, a preparation method and applications thereof, wherein the wave absorbing material comprises, by mass, 70-95% of carbon fibers and 5-30% of carbon nano-tubes coated on the surface of the carbon fibers, the carbon nano-tubes contain magnetic ferrite particles, the magnetic ferrite particles are nano-scale ferroferric oxide, nano-scale zinc ferrate, nano-scale magnesium ferrate or nano-scale cobalt ferrate, and the size of the nanoparticles is 5-30 nm.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a wave-absorbing material with magnetic ferrite nano-carbon tubes coated on the surface of carbon fibers and a preparation method and application thereof. Background technique [0002] Carbon fiber has high specific strength and specific modulus, and also has superior performance in conductivity, electromagnetic shielding, reflection and absorption, and electronic countermeasures. It is an excellent absorbing material with dual functions of mechanical load bearing and reducing radar wave reflection cross section. However, the high dielectric constant and low magnetic permeability of carbon fiber destroy its impedance matching performance, which makes the absorption strength of carbon fiber reinforced composite absorbing material weak and the absorption frequency band narrow, and its application is limited. The ferrite series materials have relatively ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 张笑晴罗元聪雷彩红程相天
Owner 常州翊翔炭材科技有限公司
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