Three-dimensional reduced graphene oxide aerogel material and preparation method thereof

A graphene aerogel, graphene technology, applied in aerogel preparation, chemical instruments and methods, colloid chemistry and other directions, can solve problems such as difficult to meet comprehensive performance requirements, achieve low density, simple preparation method, structure Stable and uniform effect

Inactive Publication Date: 2019-02-01
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional wave-absorbing materials mainly focus on strong absorption, while new-type wave-absorbing materials must meet the characteristics of "thin, light, wide, and strong", while future wave-absorbing materials should meet the requirements of multi-spectrum stealth, environmental adaptation, high temperature resistance, and ocean resistance. Climate, nuclear radiation resistance, impact resistance and other higher requirements, it is difficult for a single component material to meet these comprehensive performance requirements

Method used

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  • Three-dimensional reduced graphene oxide aerogel material and preparation method thereof
  • Three-dimensional reduced graphene oxide aerogel material and preparation method thereof
  • Three-dimensional reduced graphene oxide aerogel material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of the present embodiment is as follows: 3g graphite powder is added in the beaker that 105ml concentrated sulfuric acid is housed, and ice bath is stirred for 3h, and then the potassium permanganate of 15g is added in the mixed solution, continues ice bath and stirs for 2h and changes to normal temperature After the water bath, slowly add 210ml of deionized water along the wall of the cup, continue to stir for 30min, then slowly add 15ml of 30% hydrogen peroxide dropwise into the beaker, let the solution stand for 24h, pour off the supernatant, and use deionized water at 4500 rpm min, 15min / time, washed with water several times, centrifuged, and finally dried and collected to obtain graphite oxide. Dissolve graphite oxide in deionized water to make a 1.5 mg / ml solution, and then centrifuge at 10,000 rpm after ultrasonication for 2 hours, take the centrifuged supernatant, and dry it to obtain graphene oxide powder; 60 mg of graphene oxide powder D...

Embodiment 2

[0030] The preparation method of the present embodiment is as follows: 3g graphite powder is added in the beaker that 105ml concentrated sulfuric acid is housed, and ice bath is stirred for 3h, and then the potassium permanganate of 15g is added in the mixed solution, continues ice bath and stirs for 2h and changes to normal temperature After the water bath, slowly add 210ml of deionized water along the wall of the cup, continue to stir for 30min, then slowly add 15ml of 30% hydrogen peroxide dropwise into the beaker, let the solution stand for 24h, pour off the supernatant, and use deionized water at 4500 rpm min, 15min / time, washed with water several times, centrifuged, and finally dried and collected to obtain graphite oxide. Dissolve graphite oxide in deionized water to make a 1.5 mg / ml solution, and then centrifuge at 10,000 rpm after ultrasonication for 2 hours, take the centrifuged supernatant, and dry it to obtain graphene oxide powder; 60 mg of graphene oxide powder D...

Embodiment 3

[0035] The preparation method of the present embodiment is as follows: 3g graphite powder is added in the beaker that 105ml concentrated sulfuric acid is housed, and ice bath is stirred for 3h, and then the potassium permanganate of 15g is added in the mixed solution, continues ice bath and stirs for 2h and changes to normal temperature After the water bath, slowly add 210ml of deionized water along the wall of the cup, continue to stir for 30min, then slowly add 15ml of 30% hydrogen peroxide dropwise into the beaker, let the solution stand for 24h, pour off the supernatant, and use deionized water at 4500 rpm min, 15min / time, washed with water several times, centrifuged, and finally dried and collected to obtain graphite oxide. Dissolve graphite oxide in deionized water to make a 1.5 mg / ml solution, and then centrifuge at 10,000 rpm after ultrasonication for 2 hours, take the centrifuged supernatant, and dry it to obtain graphene oxide powder; 60 mg of graphene oxide powder D...

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Abstract

The invention discloses a three-dimensional reduced graphene oxide aerogel material and a preparation method thereof. The aerogel material is composed of graphene oxide and reduced graphene oxide, andis black and fluffy sponge-shaped overall. The three-dimensional reduced graphene oxide aerogel generates a large number of micron-sized pores in the forming process of the three-dimensional structure. After the aerogel material provided by the invention is mixed evenly with the paraffin, under the circumstance that the dosage of the aerogel material accounts for 10% of the total mass and the matching thickness is 2.5mm, in a frequency range of 2-18GHz, the reflection loss can reach -8.2dB. At the same time, in the preparation process of the three-dimensional reduced graphene oxide aerogel, ZnO and other metal nanoparticles can be carried in the pores inside the porous reduced graphene oxide, thus realizing compounding and regulation of the electromagnetic properties of the prepared material.

Description

technical field [0001] The invention relates to the technical field of airgel material preparation, in particular to a three-dimensional reduced graphene oxide airgel material and a preparation method thereof. Background technique [0002] Traditional wave-absorbing materials mainly focus on strong absorption, while new-type wave-absorbing materials must meet the characteristics of "thin, light, wide, and strong", while future wave-absorbing materials should meet the requirements of multi-spectrum stealth, environmental adaptation, high temperature resistance, and ocean resistance. With higher requirements such as climate, anti-nuclear radiation, and impact resistance, it is difficult for a single-component material to meet these comprehensive performance requirements. The wave-absorbing performance of the material is mainly determined by its complex permittivity and complex magnetic permeability. Various materials are compounded in various forms to adjust the electromagneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 代晓青段力群张波王德荣张中威董璐徐畅熊自明杨智谦
Owner ARMY ENG UNIV OF PLA
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