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Method of preparing graphene oxide/ferroferric oxide composite material under normal pressure

A technology of ferroferric oxide and composite materials, which is applied in the field of microwave-absorbing materials, can solve the problems of low output of composite materials, high equipment costs, and high prices, and achieve excellent microwave-absorbing performance, avoid agglomeration, and reduce energy loss and cost.

Active Publication Date: 2019-10-11
SHANDONG OBO NEW MATERIAL CO LTD
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Problems solved by technology

However, when the existing solvothermal method prepares iron ferric oxide nanoparticles, it needs to go through a reaction process of high temperature and high pressure, and the high pressure must require high-pressure-resistant equipment. Not only the equipment cost is high, the energy consumption is large, but also it is highly dangerous when used. , which in turn leads to problems such as low output and high price of composite materials, which limits the progress and development of ferroferric oxide composite materials in practical applications

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  • Method of preparing graphene oxide/ferroferric oxide composite material under normal pressure
  • Method of preparing graphene oxide/ferroferric oxide composite material under normal pressure
  • Method of preparing graphene oxide/ferroferric oxide composite material under normal pressure

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preparation example Construction

[0049] The invention provides a kind of preparation method of graphene oxide / ferric oxide composite material, comprises the following steps:

[0050] A) After mixing the graphene oxide polyol dispersion, ferric source, alkaline regulator, surfactant and accelerator, a mixed solution is obtained;

[0051] B) Under normal pressure, after the mixed solution obtained in the above steps is subjected to thermal reaction, a graphene oxide / ferric oxide composite material is obtained.

[0052] In the present invention, firstly, the graphene oxide polyol dispersion liquid, ferric iron source, alkaline regulator, surfactant and accelerator are mixed to obtain a mixed solution.

[0053] The present invention has no special restrictions on the polyols, and the polyols known to those skilled in the art can be used as solvents. Those skilled in the art can select and adjust according to actual production conditions, product requirements and quality requirements. Said polyhydric alcohol is p...

Embodiment 1

[0086] 1] Take the graphene oxide aqueous solution, add a certain proportion of ethylene glycol, and after mixing, use a rotary evaporator to remove the water in the mixed solution to obtain a graphene oxide ethylene glycol dispersion solution. Among them, the mass fraction of graphene oxide aqueous solution is 3‰, ethylene glycol: water = 1:1, the rotary evaporation time is 80min, and the rotary evaporation temperature is 75°C;

[0087] 2] Slowly add a certain amount of ferric chloride, sodium acetate and polyethylene glycol dropwise to the graphene oxide ethylene glycol dispersion solution obtained in step 1], and continue stirring for a period of time to obtain a mixed solution 1. Among them, the mass of ferric chloride is 10 times that of graphene oxide, the mass of sodium acetate is 20 times that of graphene oxide, the mass of polyethylene glycol is 2 times that of graphene oxide, and the stirring time is 30 minutes.

[0088] 3] Slowly add a certain amount of accelerator ...

Embodiment 2

[0100] 1] Take the graphene oxide aqueous solution, add a certain proportion of ethylene glycol, and after mixing, use a rotary evaporator to remove the water in the mixed solution to obtain a graphene oxide ethylene glycol dispersion solution. Among them, the mass fraction of the graphene oxide aqueous solution is 3‰, ethylene glycol: water = 10:1, the rotary evaporation time is 80min, and the rotary evaporation temperature is 75°C;

[0101] 2] Slowly add a certain amount of ferric chloride, sodium acetate and polyethylene glycol dropwise to the graphene oxide ethylene glycol dispersion solution obtained in step 1], and continue stirring for a period of time to obtain a mixed solution 1. Wherein, the mass of ferric chloride is 5 times that of graphene oxide, the mass of sodium acetate is 10 times that of graphene oxide, the mass of polyethylene glycol is equal to that of graphene oxide, and the stirring time is 30 minutes.

[0102] 3] Slowly add a certain amount of accelerato...

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Abstract

The invention provides a method of preparing graphene oxide / ferroferric oxide composite material under normal pressure. The method includes following steps: mixing graphene oxide polyol dispersion liquid, ferric iron source, alkaline regulator, surfactant and promoter to obtain a mixed solution; at normal pressure, allowing thermal reaction of the mixed solution obtained in the above step to obtain the graphene oxide / ferroferric oxide composite material. By adding active substance and improving production process, preparing of the graphene oxide / ferroferric oxide composite material through thermal reaction at low pressure and low temperature is realized, uniform distribution of ferroferric oxide is realized, and aggregation of graphene oxide is avoided effectively; no high-harm reductant is used, so that environment pollution is avoided. The method is simple in process, easy in operation and capable of realizing large-scale preparing.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and relates to a preparation method of a graphene oxide / ferric oxide composite material, in particular to a method for preparing a graphene oxide / ferrous oxide composite wave-absorbing material under normal pressure. Background technique [0002] With the rapid development of microwave and communication technology, people pay more and more attention to the threat of electromagnetic pollution to the environment and biological safety. The harm caused by electromagnetic pollution cannot be underestimated. In modern homes, electromagnetic waves not only benefit people, but also directly or indirectly endanger human health with the effect of "electronic smog". Therefore, research on absorbing materials has always been one of the focuses in the field. [0003] Graphene is a new type of carbon material composed of single carbon atoms closely arranged, which has a large specific surface...

Claims

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Application Information

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IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 奚洪亮赵永彬马立军张在忠
Owner SHANDONG OBO NEW MATERIAL CO LTD
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