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Iron-plated graphene and preparation method

A graphene and iron plating technology, applied in electrical components, magnetic field/electric field shielding, etc., can solve problems such as insufficient absorption strength, large thickness, and high structural requirements

Inactive Publication Date: 2016-10-12
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the data of the previous research: the frequency of electric stealing interference equipment is 400MHz-3GHz, and the single dielectric loss type and magnetic loss type absorbing materials have problems such as large thickness, narrow absorption frequency band, insufficient absorption strength and high density, etc. Interference loss type absorbing is to use the incident electromagnetic wave and the reflected electromagnetic wave to have the same amplitude and a phase difference of 180°. The incident wave and the reflected wave will cancel each other out. It has high structural requirements and is not suitable for the shielding of electric meter boxes.

Method used

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  • Iron-plated graphene and preparation method

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Effect test

Embodiment 1

[0043] The preparation method of iron-coated graphene provided in this embodiment, the graphene used is prepared by the improved Hummer method, and the iron / graphene composite material is prepared with graphene, reducing agent, iron salt, stabilizer, complexing agent, surface treatment agent, pH The regulator is used as a raw material and prepared by an in situ reduction method. And the prepared iron / graphene composite material is prepared into a wave-absorbing layer and applied to the shielding layer of the anti-interference electric meter box. The specific preparation method is as follows:

[0044] 0.5~0.8g graphite, 0.5~0.8g NaNo 3 and 23~30mL concentrated H 2 SO 4 Mix and stir under ice bath, add 3~5g KMnO 4 Graphite oxide; graphite oxide prepared by ultrasound can obtain graphene oxide; its specific flow chart is as follows:

[0045] The iron-coated graphene is prepared by reacting graphene, a reducing agent, an iron salt, a stabilizer, a complexing agent, a surface ...

Embodiment 2

[0060] The preparation method of iron / graphene composite material in the present embodiment, comprises the following steps:

[0061] Prepare graphene:

[0062] Mix natural flake graphite, sodium nitrate and concentrated sulfuric acid under an ice bath and stir to form a mixed solution;

[0063] Add potassium permanganate to the mixed solution to prepare graphene oxide by ultrasonic;

[0064] Dissolve sodium borohydride, ferrous sulfate heptahydrate and sodium hydroxide in appropriate amount of deionized water respectively;

[0065] Sodium borohydride and sodium hydroxide solution are mixed to make A solution;

[0066] Graphene oxide and ferrous sulfate heptahydrate solution are mixed to make B solution;

[0067] Add solution A and solution B dropwise into the reaction tank for full reaction so that nano-iron particles grow on the surface of graphene;

[0068] The graphene coated with nano-iron particles was obtained by suction filtration, and dried in a vacuum oven to obta...

Embodiment 3

[0097] The graphene provided in this example is prepared by a redox method, and a layer of nanoparticles is coated on the surface of the obtained graphene by an in-situ reduction method; the specific preparation method is:

[0098] 0.5g graphite, 0.5g NaNo 3 and 23 mL concentrated H 2 SO 4 Mix and stir under ice bath, add 3 g KMnO 4 Graphite oxide; graphite oxide prepared by ultrasound can be used to obtain graphene oxide. The specific process is as follows:

[0099] Firstly, graphene is prepared by oxidation-reduction method, and then a layer of nanoparticles is coated on the surface of obtained graphene by in-situ reduction method; the specific preparation method includes the following steps:

[0100] Mix 0.5g of natural flake graphite, 0.5g of sodium nitrate and 423mL of concentrated sulfuric acid in an ice bath and stir for 10 minutes;

[0101] Add 3 g of potassium permanganate, mix and stir in an ice bath for 90 minutes;

[0102] Raise the temperature of the mixture ...

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Abstract

The invention discloses a method for preparing iron-coated graphene. The improved Hummer method is used to prepare graphene, and then graphene, reducing agent, iron salt, stabilizer, complexing agent, surface treatment agent and pH regulator are used as raw materials, and the The iron / graphene composite material is prepared by in-situ reduction method; the iron-coated graphene provided by the invention has high electromagnetic wave absorption effect, and is an iron / graphene composite material with stable performance, and is applied to a new type of intelligent anti-interference electric meter box; the iron / Graphene composites can combine the high Snooker frequency, high saturation magnetization of iron particles and the better impedance matching of graphene, electric dipole polarization relaxation, etc., which can bring a wider absorption frequency band and Stronger absorption strength, better absorption and shielding effects can be obtained according to the frequency band and strength information of the jammer.

Description

technical field [0001] The invention relates to the field of electric metering equipment, in particular to a preparation method based on an iron / graphene composite material. Background technique [0002] For a long time, the problem of electricity theft has been plaguing the power supply department, and has affected the quality of power supply and the electricity consumption for production and life. Due to the low level of anti-theft technology and the diversification of electricity theft methods are the difficulties in anti-theft. Stealing electricity has seriously damaged the interests of power companies and disrupted the order of power supply and consumption. In order to prevent electricity theft, power supply enterprises have adopted various technical measures such as strengthening manpower inspection and adding anti-electricity theft measures in electric energy meters. This eliminates some power theft to a certain extent, but the means of stealing power are also contin...

Claims

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Application Information

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IPC IPC(8): H05K9/00C01B31/04B22F9/24
CPCH05K9/00B22F9/24B22F2009/245C01P2004/03
Inventor 杨芾藜侯兴哲郑可陈文礼刘型志宫林
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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