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Protein-based carbon/magnetic Fe Co nanoparticle composite wave-absorbing agent and preparation method and application thereof

A magnetic nanoparticle and nanoparticle technology, applied in the field of wave-absorbing materials, can solve problems such as unsatisfactory wave-absorbing effect and single source, and achieve the effects of easy industrial production, strong wave-absorbing performance, and great application prospects

Active Publication Date: 2019-08-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current carbon-based materials have a single source, and the absorbing effect is not ideal.

Method used

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  • Protein-based carbon/magnetic Fe Co nanoparticle composite wave-absorbing agent and preparation method and application thereof
  • Protein-based carbon/magnetic Fe Co nanoparticle composite wave-absorbing agent and preparation method and application thereof
  • Protein-based carbon/magnetic Fe Co nanoparticle composite wave-absorbing agent and preparation method and application thereof

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preparation example Construction

[0032] The invention provides a preparation method of a protein-based carbon / magnetic FeCo nanoparticle composite wave absorbing agent, comprising the following steps: 1) mixing water, ferric chloride hexahydrate, ferrous chloride tetrahydrate, and cobalt chloride hexahydrate Mixing and reacting at 70-100°C for 1-2 hours to prepare magnetic nanoparticles; 2) After mixing the magnetic nanoparticles and egg white liquid, performing curing treatment to obtain a protein-magnetic nanoparticle complex; 3) The protein obtained in step 2) -Carbonization of the magnetic nanoparticle composite to obtain a protein-based carbon / magnetic FeCo nanoparticle composite wave absorber.

[0033] The invention mixes water, ferric chloride hexahydrate, ferrous chloride tetrahydrate and cobalt chloride hexahydrate, and reacts at 70-100 DEG C for 1-2 hours to prepare magnetic nanoparticles. The ratio of iron ions to cobalt ions in the reaction system of the present invention is preferably 1:1-15, mor...

Embodiment 1

[0046] The synthetic method of protein-based carbon / magnetic Fe Co nano particle composite wave absorbing agent comprises the following reaction steps:

[0047] (1) Add water 150mL, ferric chloride hexahydrate (3.6612g, 13.55mmol), ferrous chloride tetrahydrate (1.0772g, 5.42mmol), cobalt chloride hexahydrate (0.3244g, 1.36mmol), at N 2 Under the protection of , the solution was rapidly heated to 80°C under mechanical stirring (800rpm), and then a certain amount of NH was added to the above mixture 3 ·H 2 O, after adjusting pH=10, heat and react at 80°C for 1 h, collect with magnet, wash thoroughly with deionized water and ethanol to remove impurities, weigh to obtain 0.9522 g of iron-cobalt oxide, and then disperse iron with 30 mL of deionized water cobalt oxide for further use;

[0048] (2) Add 34.19g egg white liquid into a 100mL beaker and disperse to a homogeneous solution with a disperser, add 10mL of the iron-cobalt oxide obtained in step (1) into the dispersed liqui...

Embodiment 2

[0053] The synthetic method of the protein-based carbon / magnetic Fe Co nano particle composite absorbing agent of graphene doping, comprises the following reaction steps:

[0054] (1) Disperse 4g of graphene in a mixture of concentrated sulfuric acid (120mL) and concentrated nitric acid (40mL), ultrasonicate at 40°C for 30min, then reflux at 80°C for 2h, after cooling down to room temperature, slowly add water dropwise to dilute, and then pour into a large amount of water Wash to neutral;

[0055] (2) In a 100mL beaker, add the egg white liquid of 32.48g of eggs and use a disperser to disperse to a homogeneous solution, and mix 10mL of the iron-cobalt oxide obtained in step (1) of Example 1 with the acidified graphite obtained in step (1) of 1.1g Graphene was added into the dispersed liquid protein, ultrasonicated to a uniform state, ultrasonically heated to 90°C for solidification treatment for 1 h, and then dehydrated with a freeze dryer to obtain 3.6 g of dry graphene-doped...

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Abstract

The invention provides a protein-based carbon / magnetic Fe Co nanoparticle composite wave-absorbing agent and a preparation method and application thereof, and belongs to the technical field of wave-absorbing materials. The preparation method of the protein-based carbon / magnetic Fe Co nanoparticle composite wave-absorbing agent comprises the following steps: 1) mixing water, ferric chloride hexahydrate, ferrous chloride tetrahydrate and cobalt chloride hexahydrate, and reacting for 1-2 h at the temperature of 70-100 DEG C to prepare magnetic nanoparticles; 2) mixing the magnetic nanoparticles with egg white liquid, and curing to obtain a protein-magnetic nanoparticle compound; 3) carbonizing the protein-magnetic nanoparticle compound obtained in the step 2) to obtain the protein-based carbon / magnetic Fe Co nanoparticle composite wave-absorbing agent. The material prepared by using the composite wave-absorbing agent has strong wave-absorbing performance, meanwhile has the characteristicsof wide wave-absorbing frequency band, small matching thickness of an absorber and the like, and has a large application prospect in the field of wave-absorbing materials.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a protein-based carbon / magnetic Fe Co nano particle composite wave-absorbing agent and a preparation method and application thereof. Background technique [0002] In recent years, with the increasing use of wireless devices and electronic devices, electromagnetic interference and electromagnetic wave radiation not only affect the normal operation of electronic devices, but also pose a huge threat to human health. Finding microwave-absorbing materials that can absorb microwave energy and convert it into heat energy is expected to be an effective way to solve this serious electromagnetic interference problem. Wave-absorbing materials, also called microwave-absorbing materials, stealth materials or electromagnetic wave-absorbing materials, can absorb and attenuate electromagnetic waves incident on the surface of materials, and convert electromagnetic wav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00H05K9/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C09K3/00H05K9/0081
Inventor 岳喜贵徐攀左小丹李梦竹
Owner JILIN UNIV
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