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A kind of preparation method of graphene/polyaniline binary absorbing material

A wave absorbing material and graphene technology are applied in the field of preparation of graphene wave absorbing materials, which can solve the problems of low wave absorbing performance, easy phase separation of graphene and polyaniline, etc. The effect of bandwidth

Active Publication Date: 2021-04-02
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a preparation method of graphene / polyaniline binary absorbing material, to overcome the low absorbing performance of graphene / polyaniline binary absorbing material in the prior art and the combination of graphene and polyaniline Defects of easy phase separation between anilines

Method used

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  • A kind of preparation method of graphene/polyaniline binary absorbing material
  • A kind of preparation method of graphene/polyaniline binary absorbing material
  • A kind of preparation method of graphene/polyaniline binary absorbing material

Examples

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Effect test

Embodiment 1

[0044] (1) Weigh 3g of graphite powder in a 1000mL three-necked flask, mix 360mL of concentrated sulfuric acid and 40mL of phosphoric acid, pour it into the flask, and keep it warm at 0°C for 30min; then weigh 18g of potassium permanganate, divide Add it to the above mixed solution in batches, then raise the temperature to 50°C for 10 hours, add it into 400mL deionized water after the reaction is completed, then add hydrogen peroxide drop by drop until the solution turns golden yellow, finally centrifuge, wash, and freeze-dry for later use;

[0045] (2) Accurately weigh 200mg of graphite oxide in a 500ml beaker, then measure 100ml of deionized water and add it to the beaker, ultrasonically disperse it evenly for 0.5h, and crush it with an ultrasonic cell disruptor for 2h (power 595W) , to obtain a single-layer graphene oxide solution, and then dropwise add 1mol / L sodium hydroxide solution to the graphene oxide solution to adjust its pH value to 10, to obtain an alkaline graphen...

Embodiment 2

[0051] In step (3) of Example 1, "raise the temperature to 80°C and react for 3h" was changed to "raise the temperature to 90°C and react for 3h", and the rest were the same as in Example 1 to obtain a graphene / polyaniline binary absorbing material.

[0052] Figure 4 It shows that after aniline functional modification and hydrazine hydrate reduction, a large number of oxygen-containing functional groups on the surface of graphene oxide disappear, and at 1090cm -1 and 1649cm -1 Two peaks appeared at , corresponding to C-N bond and N-H bond, which proved that graphene oxide was successfully grafted with aniline and reduced.

Embodiment 3

[0054] "200mg of graphite oxide" in the step (2) of Example 1 to obtain a concentration of alkaline graphene oxide solution of 2mg / ml is changed to "400mg of graphite oxide" to obtain a concentration of alkaline graphene oxide solution of 4mg / ml; Change "the aniline monomer that adds 2g in the basic graphene oxide solution that obtains" into "the aniline monomer that adds 4g in the basic graphene oxide solution that obtains"; In step (3), "add 0.4mL Hydrazine hydrate (85%), warming up to 80°C, reacting for 3h" was changed to "add 0.76mL hydrazine hydrate (98%), warming up to 90°C, reacting for 3h"; ) in the hydrochloric acid solution of 50ml (concentration is 1mol / L)" is changed to "the functionalized graphene in 23.25mg step (3) is dissolved in the hydrochloric acid solution of 50ml (concentration is 1mol / L )"; the rest are the same as in Example 1 to obtain the graphene / polyaniline binary absorbing material.

[0055] Figure 5 It shows that the weight loss of graphene oxid...

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Abstract

The invention relates to a preparation method of a graphene / polyaniline binary wave absorbing material. The method includes the steps: preparing alkaline graphene oxide solution; preparing functionalgraphene oxide solution; preparing functional graphene; preparing the graphene / polyaniline binary wave absorbing material. The method is simple in preparation process, and raw materials are easy to get and low in cost and toxicity.

Description

technical field [0001] The invention belongs to the field of preparation of graphene wave-absorbing materials, in particular to a preparation method of graphene / polyaniline binary wave-absorbing materials. Background technique [0002] With the application of electromagnetic wave technology more and more widely, whether in civilian or military fields, the increasingly serious problem of electromagnetic wave pollution has gradually attracted human attention. As a strategy that can effectively solve the problem of electromagnetic wave pollution, wave-absorbing materials have emerged as the times require. A microwave-absorbing material is a material that can convert electromagnetic waves projected onto its surface into heat energy or other forms of energy through a corresponding loss mechanism to reduce electromagnetic wave pollution. Traditional wave-absorbing materials such as ferrite, Magnetic metal particles and their alloys, etc., are limited in practical applications due ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02C08K3/04
CPCC08G73/0266C08K3/04
Inventor 胡祖明康帅于俊荣王彦诸静
Owner DONGHUA UNIV
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