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Preparation method of calcium hydroxide/graphene nano composite material

A technology of nanocomposite material and calcium hydroxide, applied in the field of preparation of calcium hydroxide/graphene nanocomposite material, can solve the problems such as the inability to give full play to the dispersing effect of graphene, achieve easy industrialized mass production, prevent agglomeration, and reaction conditions mild effect

Inactive Publication Date: 2019-02-22
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is to combine the prepared calcium hydroxide nanoparticles with graphene, which cannot give full play to the dispersion effect of graphene.

Method used

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  • Preparation method of calcium hydroxide/graphene nano composite material
  • Preparation method of calcium hydroxide/graphene nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 100 mg of graphene powder and 600 mg of sodium chlorate to 50 mL of concentrated sulfuric acid, and stir for 6 hours in an ice bath.

[0024] (2) Centrifugally clean the modified functionalized graphene and dry to obtain a powder. Add the powder to the aqueous solution and ultrasonicate for 1 hour to obtain a 1 mg / mL functionalized graphene aqueous dispersion.

[0025] (3) Add 10 mmol of calcium chloride to the functionalized graphene dispersion, stir at room temperature for 1 hour, and after mixing is uniform, continue to stir and heat to 90°C.

[0026] (4) Add 1 mmol / mL sodium hydroxide solution dropwise to the solution at a rate of 1 mL / min, add 12 mL in total, and continue to keep the temperature for 30 minutes after the addition is complete.

[0027] (5) After centrifugal water washing and vacuum drying, heat treatment at 400°C for 1 h in a protective atmosphere to obtain calcium hydroxide / graphene nanocomposite powder.

[0028] figure 1 The TEM image of the function...

Embodiment 2

[0031] (1) Add 100 mg of graphene powder and 800 mg of sodium chlorate to 50 mL of concentrated sulfuric acid, and stir for 6 hours in an ice bath.

[0032] (2) Centrifugally clean the modified functionalized graphene and dry to obtain a powder. Add the powder to the aqueous solution and ultrasonicate for 1 hour to obtain a 1 mg / mL functionalized graphene aqueous dispersion.

[0033] (3) Add 10 mmol of calcium chloride to the functionalized graphene dispersion, stir at room temperature for 1 hour, and after mixing is uniform, continue to stir and heat to 90°C.

[0034] (4) Add 1 mmol / mL sodium hydroxide solution dropwise to the solution at a rate of 1 mL / min, add 12 mL in total, and continue to keep the temperature for 30 minutes after the addition is complete.

[0035] (5) After centrifugal water washing and vacuum drying, heat treatment at 400°C for 1 h in a protective atmosphere to obtain calcium hydroxide / graphene nanocomposite powder.

Embodiment 3

[0037] (1) Add 100 mg of graphene powder and 600 mg of sodium chlorate to 50 mL of concentrated sulfuric acid, and stir for 6 hours in an ice bath.

[0038] (2) Centrifugal cleaning the modified functionalized graphene, drying to obtain powder, adding the powder to the aqueous solution, and sonicating for 1 hour to obtain a 0.5 mg / mL functionalized graphene aqueous dispersion.

[0039] (3) Add 10 mmol of calcium chloride to the functionalized graphene dispersion, stir at room temperature for 1 hour, and after mixing is uniform, continue to stir and heat to 90°C.

[0040] (4) Add 1 mmol / mL sodium hydroxide solution dropwise to the solution at a rate of 1 mL / min, add 12 mL in total, and continue to keep the temperature for 30 minutes after the addition is complete.

[0041] (5) After centrifugal water washing and vacuum drying, heat treatment at 400°C for 1 h in a protective atmosphere to obtain calcium hydroxide / graphene nanocomposite powder.

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Abstract

The invention provides a preparation method of a calcium hydroxide / graphene nano composite material. The preparation method comprises the following steps: adding graphene powder and sodium chlorate into concentrated sulphuric acid, and stirring in an ice bath state; modifying the surface of the graphene with an oxygen containing group, and adding calcium chloride into functionalized graphene dispersion liquid; uniformly mixing and then heating to 60 to 90 DEG C, and dropwise adding a sodium hydroxide solution into the solution at the speed of 0.5 to 2mL / min; after dropwise adding is finished,continuously insulating for 30 to 60 minutes, centrifugally washing and then carrying out vacuum drying; heating at 40 DEG C in the protective atmosphere for 0.5 to 2 hours to obtain calcium hydroxide / graphene nano composite material powder. According to the method disclosed by the invention, calcium hydroxide nanoparticles are generated on the surface of the graphene in situ and are uniformly distributed; reaction conditions are mild. The preparation method has the advantages of simplicity in preparation, low cost and easiness in industrial batch production.

Description

Technical field [0001] The invention relates to the field of composite material preparation, in particular to a method for preparing calcium hydroxide / graphene nano composite material. Background technique [0002] Calcium hydroxide is a commonly used building material and is also used as a fungicide and chemical raw material. It has a wide range of uses in medical treatment, metallurgy, glass, paper, leather, calcium carbide, soil improvement, water treatment, and gas purification. Nano calcium hydroxide can be used for mural restoration, deacidification of paper cultural relics, and strengthening of stone cultural relics. Its application in cultural relics protection has gradually attracted people's attention. [0003] The preparation methods of nano calcium hydroxide include sol-gel method, precipitation method, ion exchange method and so on. However, the nano-calcium hydroxide synthesized by these methods has always had the disadvantages of being easy to agglomerate and diffic...

Claims

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Application Information

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IPC IPC(8): C01F11/02C01B32/194
CPCC01B32/194C01F11/02C01P2004/04
Inventor 苗中正吴帅朱海霞
Owner YANCHENG TEACHERS UNIV
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