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Method for preparing grapheme/ ceramic nanocrystalline particle composite material with electrospinning-hydrothemal method

A composite material, graphene technology, applied in filament/thread forming, textile and papermaking, fiber processing and other directions, can solve the problem of product specific surface area reduction, etc., to achieve the effect of facilitating industrial production

Inactive Publication Date: 2011-11-23
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of reducing graphene oxide to graphene, the carbon atoms change from sp3 hybridization to sp2 hybridization, which leads to irreversible agglomeration of graphene, and the product ratio Surface area reduced to only 1 m2 / g

Method used

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  • Method for preparing grapheme/ ceramic nanocrystalline particle composite material with electrospinning-hydrothemal method
  • Method for preparing grapheme/ ceramic nanocrystalline particle composite material with electrospinning-hydrothemal method
  • Method for preparing grapheme/ ceramic nanocrystalline particle composite material with electrospinning-hydrothemal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a. Weigh 0.4 g of PVP and dissolve it in 7 mL of ethanol solvent, then add 2.0 g of glacial acetic acid and 1 mL of isopropyl titanate, stir magnetically at 20 °C for 1 h at a speed of 350 rpm / min, and obtain an electric spinning solution.

[0019] b. Electrospinning was carried out at 20 °C and a humidity of 45%. The flow rate of the electrospinning solution was 10 mL / h, the DC voltage was 15 kV, and the spinning receiving distance was 15 cm to obtain TiO 2 / PVP composite nanofibers.

[0020] c. Weigh 20 mg of electrospun composite nanofibers, immerse them in an aqueous solution of 75 vol % acetic acid, and configure a solution with a mass concentration of 1 mg / mL. At this time, PVP is dissolved in the solution, and at the same time, the nanofiber branches TiO 2 nanoparticles.

[0021] d, according to graphene oxide: TiO 2 The mass ratio of PVP / PVP composite nanofibers is 100:1. Add 2 g of graphene oxide into the above solution and stir evenly with a glass rod.

...

Embodiment 2

[0026] a. Weigh 0.3 g of PVP and dissolve it in 4 mL of ethanol, then add 1 mL of hydrochloric acid and 5 mL of tetraethyl orthosilicate, and stir magnetically at 20 °C for 12 h at a speed of 500 rpm / min to obtain an electrospinning solution .

[0027] b. Electrospinning was performed at 35 °C and a humidity of 80%. The flow rate of the electrospinning solution was 0.3 mL / h, the DC voltage was 35 kV, and the spinning receiving distance was 35 cm to obtain SiO 2 / PVP composite nanofibers.

[0028] c. Weigh 5 g of electrospun composite nanofibers, immerse them in water, and configure a solution with a mass concentration of 0.5 g / mL. At this time, PVP is dissolved in water, and at the same time, the nanofibers branch into fine SiO 2 nanoparticles.

[0029] d, according to graphene oxide: SiO 2 / PVP composite nanofiber mass ratio is 1:100, 0.1 g graphene oxide is added to the above solution, and stirred evenly with a glass rod.

[0030] e. Transfer the above solution to a hydr...

Embodiment 3

[0034] a. Weigh 0.3 g of PVA and dissolve in 8 mL of distilled water, then add 2.0 g of glacial acetic acid and 1 g of zinc acetate, and stir magnetically at 90 °C for 24 h at a speed of 50 rpm / min to obtain an electrospinning solution.

[0035] b. Electrospinning was carried out at 30 °C and a humidity of 10%. The flow rate of the electrospinning solution was 0.3 mL / h, the DC voltage was 35 kV, and the spinning receiving distance was 35 cm to obtain ZnO / PVA composite nanofibers.

[0036]c. Weigh 10 g of electrospun composite nanofibers, immerse them in water, and configure a solution with a mass concentration of 0.5 g / mL. At this time, PVA is dissolved in water, and at the same time, the nanofibers are branched into fine ZnO nanoparticles .

[0037] d. Add 0.1 g of graphene oxide into the above solution according to the mass ratio of graphene oxide:ZnO / PVA composite nanofibers of 1:100, and stir evenly with a glass rod.

[0038] e. Transfer the above solution to a hydrotherm...

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Abstract

The invention discloses a method for preparing grapheme / ceramic nanocrystalline particle composite material with an electrospinning-hydrothemal method. The method comprises the following steps: firstly, preparing ceramic / polymer composite fiber by electrospinning; then, dissolving the composite fiber into a solvent for dissolving polymers; dismembering the fiber into tiny ceramic nanocrystalline seeds while the polymers in the composite fiber are dissolved; then, adding graphene oxide; carrying out hydrothermal or solvothermal reaction; and after reaction ends, adding a reducing agent to reduce the graphene oxide into grapheme. The ceramic / polymer composite fiber is weaved by the electrospinning, and the hydrolysis speed of the metallorganics of a ceramic material precursor is controlled by controlling the moisture, electrospinning flow rate and the like in the electrospinning environment. The electrospinning method and the hydrothemal method are both simple and easy to implement and can be used for industrially producing and preparing nanofiber materials. The combination of the electrospinning method and the hydrothemal method creates convenience for industrial production of materials.

Description

technical field [0001] The invention belongs to a method for preparing a graphene / ceramic nanocrystal particle composite material, in particular to a method for preparing a ceramic nanocrystal particle / graphene composite material by combining an electrospinning method and a hydrothermal method. [0002] Background technique [0003] Existing technology: Graphene (GE) is a carbon atom with sp 2 The hybrid orbitals form hexagonal two-dimensional planar materials with a honeycomb lattice, and the most commonly used preparation method is chemical reduction. However, in the process of reducing graphene oxide to graphene, carbon atoms are replaced by sp 3 hybridization to sp 2 Hybridization, leading to irreversible agglomeration of graphene, the specific surface area of ​​the product is reduced to only 1 m 2 / g. [0004] Most of the ceramic materials are oxides, nitrides, borides and carbides. This kind of material is famous for its superior mechanical strength and chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/46C04B35/14C04B35/453C04B35/10C04B35/622C01B31/04D01D5/00
Inventor 孙岳明代云茜郑颖平景尧王春龙齐齐
Owner SOUTHEAST UNIV
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