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Graphene composite material, graphene aluminum oxide composite material and preparation method and application of graphene aluminum oxide composite powder material

A kind of aluminum oxide and composite material technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of easy agglomeration, poor dispersion, limited use, etc., and achieve the effect of easy agglomeration

Inactive Publication Date: 2019-04-19
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, the large surface energy of graphene oxide also brings about the problem of easy agglomeration and poor dispersion, which greatly limits its use in composite materials.

Method used

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  • Graphene composite material, graphene aluminum oxide composite material and preparation method and application of graphene aluminum oxide composite powder material

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preparation example Construction

[0028] A method for preparing a graphene composite material provided in an embodiment of the present application includes the following steps: slowly releasing aluminum ions from a metal salt complex in an alkaline environment, and then adding a graphene oxide material. Thereby, the problem of agglomeration of the graphene oxide material can be avoided.

[0029] Further, the preparation method of a graphene-alumina composite material provided in the embodiment of the present application includes the following steps: adding the graphene oxide material after the aluminum salt complex slowly releases aluminum ions in an alkaline environment.

[0030] By placing the aluminum salt complex in an alkaline environment, the aluminum ions originally fixed in the complex can be slowly released. Therefore, it provides a favorable guarantee for the subsequent preparation of graphene composite materials with good performance.

[0031] The inventors have found in long-term research that gra...

Embodiment 1

[0077] A kind of graphene-alumina composite powder material provided in this embodiment is prepared according to the following steps:

[0078] 1) Using sodium citrate and aluminum sulfate salt solution for electrovalent complexation, wherein the concentration of aluminum sulfate solution is 0.1mol / L;

[0079] 2) Weigh urea and graphene oxide, wherein, calculate the quality of graphene oxide according to graphene quality being 0.3% of alumina quality; After adding urea and graphene oxide to deionized water and mixing uniformly, add to step 1) In the prepared mixed solution, ensure that urea and Al 3+ The molar ratio is 2:1.

[0080] 3) Stir and heat the mixed solution prepared in step 2) in an oil bath, the stirring rate is 500r / min, the temperature is 60°C, and the reaction time is 8 hours.

[0081] 4) Centrifuge the precipitate obtained from the reaction in step 3), and dry it at 80° C. into powder.

[0082] 5) Calcining the powder obtained in step 4) at 450° C. for 30 min...

Embodiment 2

[0084] A kind of graphene-alumina composite powder material provided in this embodiment is prepared according to the following steps:

[0085] 1) Equivalent complexation of sodium citrate and aluminum sulfate solution, wherein the concentration of aluminum sulfate solution is 0.6mol / L;

[0086] 2) Weigh urea and graphene oxide, wherein, calculate the quality of graphene oxide according to graphene quality being 0.3% of alumina quality; After adding urea and graphene oxide to deionized water and mixing uniformly, add to step 1) In the prepared mixed solution, ensure that urea and Al 3+ The molar ratio is 3:1.

[0087] 3) Stir and heat the mixed solution prepared in step 2) in an oil bath, the stirring rate is 500r / min, the temperature is 100°C, and the reaction time is 12 hours.

[0088] 4) Centrifuge the precipitate obtained from the reaction in step 3), and dry it at 100° C. into powder.

[0089] 5) Calcining the powder obtained in step 4) at 440° C. under a nitrogen atmos...

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Abstract

The invention relates to the field of material preparation, in particular to a graphene composite material, a graphene aluminum oxide composite material and a preparation method and application of a graphene aluminum oxide composite powder material. The method comprises the following steps that aluminum ions are slowly released from an aluminum salt complex in an alkaline environment, and a graphene oxide material is added. By placing the aluminum salt complex in an alkaline environment, aluminum ions originally immobilized in the complex can be slowly released, thereby providing favorable guarantee for the subsequent preparation of the graphene composite material with good performance. The graphene aluminum oxide composite powder material is not easy to agglomerate, so that when the graphene aluminum oxide composite powder material is applied to the preparation of ceramic composite materials, metal composite materials and polymer composite materials, the graphene aluminum oxide composite powder material is not easy to agglomerate so as to prepare the ceramic composite materials, the metal composite materials and the polymer composite materials with good performance, thereby effectively solving the problem that graphene oxide materials are easy to agglomerate in the prior art.

Description

technical field [0001] The present application relates to the field of material preparation, in particular, to a preparation method and application of graphene composite material, graphene alumina composite material and graphene alumina composite powder material. Background technique [0002] Graphene is known as the king of new materials for its excellent mechanical and mechanical properties, electrical properties, and transparency. A large number of research results show that graphene has a large specific surface area, excellent barrier properties, high chemical stability and good Conductivity and other properties have a strong effect on improving the comprehensive performance of anti-corrosion coatings, such as enhancing the adhesion of coatings to substrates, improving the wear resistance and anti-corrosion properties of coatings, and at the same time have the characteristics of environmental protection, safety, and no secondary pollution. [0003] But at present, the la...

Claims

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Application Information

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IPC IPC(8): C01B32/194
CPCC01B32/194
Inventor 于显著于宏兵董恒于晗
Owner NANKAI UNIV
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