Preparation method of elastic hydrophobic carbon nano tube and graphene compound aerogel

A graphene composite, carbon nanotube technology, applied in the field of materials, can solve the problems of different sheet sizes, weak sheet force, complex mass production, etc., to increase specific surface area, good dispersion effect, and improve mechanical properties. Effect

Inactive Publication Date: 2018-02-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the shortcomings of high technical requirements and complex mass production, and solve the problem of stacking between graphene sheets during the assembly and drying process due to the different sizes of graphene oxide (GO) sheets and the weak force between the sheets , structural collapse resulting in the brittleness and weak elasticity of the aerogel

Method used

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  • Preparation method of elastic hydrophobic carbon nano tube and graphene compound aerogel
  • Preparation method of elastic hydrophobic carbon nano tube and graphene compound aerogel
  • Preparation method of elastic hydrophobic carbon nano tube and graphene compound aerogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The mixed solution for preparing the elastic hydrophobic carbon nanotube-graphene composite airgel consists of the following components in parts by weight: 0.5 part of graphene oxide, 0.3 part of carboxyl carbon nanotube, 0.07 part of crosslinking agent, 0.0005 parts of alkaline reducing agent, 2000 parts of deionized water. The crosslinking agent is polyvinylpyrrolidone, and the alkaline reducing agent is sodium citrate.

[0032] A preparation method of carboxyl carbon nanotube-graphene composite airgel, comprising the following steps:

[0033] (1) Prepare a homogeneous aqueous solution of graphene oxide, carboxyl carbon nanotubes, reducing agent and polymer.

[0034] ① Weigh 0.5 g of graphene oxide, add it into 1000 ml of water, and ultrasonically peel it off for 1 min to obtain a uniformly dispersed graphene oxide aqueous solution. The mass concentration of the graphite oxide aqueous solution is 0.5 mg / ml. The graphene oxide is prepared by the improved Hummers' met...

Embodiment 2

[0040] The difference from Example 1 is that the mixed liquid used to prepare the elastic hydrophobic carbon nanotube-graphene composite airgel consists of the following components in parts by weight: 1 part of graphene oxide, 0.1 part of carboxyl carbon nanotube Tube, 0.1 part of cross-linking agent, 0.005 part of alkaline reducing agent, 2000 parts of deionized water. The crosslinking agent is polyvinylamine, and the alkaline reducing agent is sodium ascorbate.

[0041] A preparation method of carboxyl carbon nanotube-graphene composite airgel, comprising the following steps:

[0042] (1) Prepare a homogeneous aqueous solution of graphene oxide, carboxyl carbon nanotubes, reducing agent and polymer.

[0043] ① Weigh 1.0 g of graphene oxide, add it into 1000 ml of water, and ultrasonically peel it off for 5 minutes to obtain a uniformly dispersed graphene oxide aqueous solution, the mass concentration of which is 1.0 mg / ml.

[0044] ② Weigh 0.1 g of carboxy carbon nanotubes...

Embodiment 3

[0049] Different from Example 1, the mixed liquid used to prepare the elastic hydrophobic carbon nanotube-graphene composite airgel consists of the following components in parts by weight: 3 parts of graphene oxide, 0.6 part of carboxyl carbon nano Tube, 0.0001 parts of cross-linking agent, 0.01 parts of alkaline reducing agent, 2000 parts of deionized water. The cross-linking agent is methyl cellulose, and the alkaline reducing agent is ethylenediamine.

[0050] A preparation method of carboxyl carbon nanotube-graphene composite airgel, comprising the following steps:

[0051] (1) Prepare a homogeneous aqueous solution of graphene oxide, carboxyl carbon nanotubes, reducing agent and polymer.

[0052] ① Weigh 3.0 g of graphene oxide, add it to 1000 ml of water, and ultrasonically peel it off for 10 minutes to obtain a uniformly dispersed graphene oxide aqueous solution, the mass concentration of which is 3.0 mg / ml.

[0053] ② Weigh 0.6 g of carboxy carbon nanotubes, add them...

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Abstract

The invention discloses mixed liquor for preparing an elastic hydrophobic carbon nano tube and graphene compound aerogel. The mixed liquor consists of the following components in parts by weight: 0.1to 15 parts of oxidized graphene, 0.01 to 9 parts of carboxyl carbon nano tubes, 0.0001 to 0.1 part of a cross-linking agent, 0.0005 to 0.5 part of an alkaline reducing agent and 2000 parts of deionized water. The method for preparing the carboxyl carbon nano tube and graphene compound aerogel from the components comprises the following steps: (1) preparing a homogeneous water solution of oxidizedgraphene, carboxyl carbon nano tubes, the reducing agent and polymers; (2) preparing a carbon nano tube and graphene hydrogel through one-step hydrothermal reduction; and (3) carrying out dialysis and soaking treatment, and after drying, obtaining the carbon nano tube and graphene aerogel. According to the aerogel prepared in the invention, the mechanical property of the aerogel is improved, thespecific surface area of the aerogel is increased, and the aerogel can be used in the fields of dye absorption, catalytic carriers, variable resistors and the like; the density is just 1.2 to 15.8 mg/cm<3>, the hydrophobic angle is greater than 90 degrees, and the compression rate is 10% to 80%; and due to hydrophobic property and selective adsorption of the aerogel, the aerogel can be widely applied to treatment of oily wastewater and organic matter wastewater.

Description

technical field [0001] The invention belongs to the field of materials, in particular to the preparation of graphene airgel, in particular to the preparation method of elastic hydrophobic carbon nanotube-graphene airgel. Background technique [0002] Graphene Aerogel, also known as carbon sponge, is a new type of carbon material. Due to its high porosity, large specific surface area, ultra-low density, excellent electrical conductivity, super energy storage characteristics, refractoriness and selective adsorption, it has attracted widespread attention and is regarded as a catalytic carrier, energy storage, variable resistance, Carbon materials with the most development prospects in the fields of aerospace exploration and environmental governance. However, due to the wide range of size distribution of graphene oxide (GO) sheets prepared by the traditional Hummers' method, if there is no subsequent separation and purification treatment, the graphene sheets are prone to stacki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/194C01B32/168
CPCC01P2004/03C01P2006/10
Inventor 刘会娥马雁冰陈爽丁传芹黄扬帆
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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