A kind of polyaniline/graphene/polyvinyl alcohol composite gel and preparation method thereof

A technology of graphene composite and polyvinyl alcohol, which is applied in the field of new materials and supercapacitors, can solve the problems of reduced specific surface area, reduced performance of composite materials, and difficult processing, and achieves mild reaction conditions, adjustable component content, and reaction Effects in simple steps

Active Publication Date: 2021-02-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyaniline is insoluble and infusible, has poor ductility and is difficult to process
Graphene has poor hydrophilic properties, and the sheets are easy to agglomerate and stack together, which greatly reduces its specific surface area and reduces its performance in composite materials.

Method used

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  • A kind of polyaniline/graphene/polyvinyl alcohol composite gel and preparation method thereof
  • A kind of polyaniline/graphene/polyvinyl alcohol composite gel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of polyaniline / graphene / polyvinyl alcohol composite gel, its preparation method comprises the steps:

[0025] 1) Disperse 0.1g of graphene oxide and 0.1g of p-phenylenediamine in 150mL of N,N-dimethylformamide, react at 100°C for 18 hours, centrifuge, wash and dry to obtain aniline-containing oxide Graphene;

[0026] 2) Disperse 0.06 g of graphene oxide containing aniline groups and 0.06 g of aniline in 20 mL of water, and conduct a hydrothermal reaction at 180 ° C for 18 hours to obtain a polyaniline / graphene composite gel;

[0027] 3) Immerse 0.15 g of the obtained polyaniline / graphene composite gel in a polyvinyl alcohol solution with a volume of 30 mL and a concentration of 20 mg / mL at 80 ° C, and then cycle freezing and thawing at -50 ° C and room temperature for 10 times to obtain polyaniline / graphene / polyvinyl alcohol composite gel.

[0028] figure 1 It is the test result of the height retention of the composite gel obtained in this embodiment after be...

Embodiment 2

[0030] A kind of polyaniline / graphene / polyvinyl alcohol composite gel, its preparation method comprises the steps:

[0031] 1) Disperse 0.15g of graphene oxide and 0.2g of p-phenylenediamine in 200mL of N,N-dimethylformamide, react at 105°C for 24 hours, centrifuge, wash and dry to obtain aniline-containing oxide Graphene;

[0032] 2) Disperse 0.1 g of graphene oxide containing aniline groups and 0.15 g of aniline in 30 mL of water, and conduct a hydrothermal reaction at 165 ° C for 20 h to obtain a polyaniline / graphene composite gel;

[0033] 3) Immerse 0.2 g of the obtained polyaniline / graphene composite gel in a polyvinyl alcohol solution with a volume of 35 mL and a concentration of 50 mg / mL at 85 ° C, and then cycle freezing and thawing at -30 ° C and room temperature for 5 times to obtain polyaniline / graphene / polyvinyl alcohol composite gel.

Embodiment 3

[0035] A kind of polyaniline / graphene / polyvinyl alcohol composite gel, its preparation method comprises the steps:

[0036] 1) Disperse 0.35g of graphene oxide and 0.4g of p-phenylenediamine in 350mL of N,N-dimethylformamide, react at 105°C for 30 hours, centrifuge, wash, and dry to obtain aniline-containing oxide Graphene;

[0037] 2) Disperse 0.15 g of graphene oxide containing aniline groups and 0.2 g of aniline in 40 mL of water, and conduct a hydrothermal reaction at 195 ° C for 12 hours to obtain a polyaniline / graphene composite gel;

[0038] 3) Immerse 0.35 g of the obtained polyaniline / graphene composite gel in a polyvinyl alcohol solution with a volume of 40 mL and a concentration of 100 mg / mL at 90 ° C, and then cycle freezing and thawing at -30 ° C and room temperature for 12 times to obtain polyaniline / graphene / polyvinyl alcohol composite gel.

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Abstract

The invention discloses a polyaniline / graphene / polyvinyl alcohol composite gel. First, graphene oxide and p-phenylenediamine are dispersed and reacted to obtain aniline-containing graphene; aniline and aniline-containing graphene are subjected to water Thermal reaction to obtain polyaniline / graphene composite gel, which is then immersed in polyvinyl alcohol solution for cyclic freezing and thawing treatment. The present invention uses aniline as a reducing agent and a polymerization monomer at the same time, uses aniline to reduce graphene oxide in a hydrothermal reaction, and initiates the polymerization of aniline through the aniline group grafted on the graphene, and realizes the molecular level of polyaniline and graphene. Composite, and further use the hydrogen bond interaction between polyvinyl alcohol and polyaniline to enhance the mechanical properties of the resulting gel, so that the composite gel has good compression recovery performance, which can be used to prepare compressible supercapacitors, etc.; and the preparation method involved is simple , mild reaction conditions, adjustable composite gel components, suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of new materials and supercapacitors, and in particular relates to a polyaniline / graphene / polyvinyl alcohol composite gel and a preparation method thereof. Background technique [0002] Carbon nanomaterials have been widely used in the preparation of composite materials. Graphene is a new type of carbon material with a two-dimensional nanostructure. In its two-dimensional plane, each carbon atom is connected to three adjacent carbon atoms by a σ bond. These C-C bonds make graphene have a good structure rigidity. The remaining one p-electron orbital is perpendicular to the graphene plane and overlaps with the surrounding p-electron orbitals to form a large delocalized π bond, which makes graphene have good conductivity. When graphene and polymer can be uniformly compounded, it is helpful to improve the mechanical, electrical, thermal and gas barrier properties of the polymer. [0003] Gel material is a sof...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L79/02C08K3/04C08J3/075C08G73/02
CPCC08G73/0266C08J3/075C08J2329/04C08J2479/02C08K3/042
Inventor 李亮韩笑喻湘华穆海梅熊丽君张桥
Owner WUHAN INSTITUTE OF TECHNOLOGY
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