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A kind of preparation method of polypyrrole-graphene-polyvinyl alcohol composite airgel

A polyvinyl alcohol gel and composite aerogel technology, which is applied in the field of material preparation, can solve the problems of easy agglomeration of lamellae, poor hydrophilic properties of graphene, and reduced specific surface area, and achieves good application prospects and good hydrophilicity. The effect of lipophilicity and simple preparation process

Inactive Publication Date: 2018-12-14
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene has poor hydrophilicity, and the sheets are easy to agglomerate and stack together, which greatly reduces its specific surface area, which reduces its performance in composite materials.

Method used

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  • A kind of preparation method of polypyrrole-graphene-polyvinyl alcohol composite airgel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dissolve 5 g of polyvinyl alcohol powder in 500 mL of distilled water to obtain a polyvinyl alcohol solution with a concentration of 10 mg / mL;

[0031] (2) Add 50 mg of graphene oxide solid into 50 mL of distilled water, and obtain a uniformly dispersed graphene oxide solution with a concentration of 1 mg / mL by stirring and ultrasonically dispersing.

[0032] (3) Add 20 μL pyrrole monomer (0.28mmol) successively to 20mL graphene oxide dispersion liquid, 0.2mL concentration is 10wt% glutaraldehyde solution, 5mL polyvinyl alcohol solution, after stirring 0.5h, stand still 1h; Will get The composite was freeze-thawed 8 times at -60°C and normal temperature to obtain pyrrole-graphene oxide-polyethylene gel.

[0033] (4) Pyrrole-graphene oxide-polyvinyl alcohol gel was placed in 12 mL of 0.1mol / L ammonium persulfate solution for 6 hours, and then placed in 120 μL hydrazine hydrate for 6 hours to obtain polypyrrole-graphene-polyvinyl alcohol Composite airgel.

[0034] T...

Embodiment 2

[0037] (1) Dissolve 5 g of polyvinyl alcohol powder in 250 mL of distilled water to obtain a polyvinyl alcohol solution with a concentration of 20 mg / mL;

[0038] (2) Add 50 mg of graphene oxide solid into 25 mL of distilled water, and obtain a uniformly dispersed graphene oxide solution with a concentration of 2 mg / mL by stirring and ultrasonically dispersing.

[0039] (3) Add 30 μL of pyrrole monomer (0.43 mmol) successively to 20 mL of graphene oxide dispersion, 1 mL of glutaraldehyde solution with a concentration of 15 wt %, and 2 mL of polyvinyl alcohol solution, stir for 1 h, then let stand for 1 h; The complex was frozen and thawed 5 times at -10°C and normal temperature to obtain pyrrole-graphene oxide-polyethylene gel;

[0040] (4) Pyrrole-graphene oxide-polyvinyl alcohol gel was placed in 15mL 0.1mol / L ammonium persulfate solution for 6h, and then placed in 120μL hydrazine hydrate for 12h to obtain polypyrrole-graphene-polyvinyl alcohol composite airgel.

[0041] T...

Embodiment 3

[0043] (1) Dissolve 5 g of polyvinyl alcohol powder in 100 mL of distilled water to obtain a polyvinyl alcohol solution with a concentration of 50 mg / mL;

[0044] (2) Add 50 mg of graphene oxide solid into 25 mL of alcohol, stir and ultrasonically disperse to obtain a uniformly dispersed graphene oxide solution with a concentration of 2 mg / mL.

[0045] (3) Add 40 μ L pyrrole monomer (0.57 mmol) successively to 15 mL graphene oxide dispersion, 0.5 mL concentration is 20 wt % glutaraldehyde solution, 2 mL polyvinyl alcohol solution, after stirring for 1 h, let stand for 5 h; will get The compound was frozen and thawed 5 times at -30°C and normal temperature to obtain pyrrole-graphene oxide-polyethylene gel;

[0046] (4) Pyrrole-graphene oxide-polyvinyl alcohol gel was placed in 20mL 0.1mol / L ammonium persulfate solution for 12h, and then placed in 60μL hydrazine hydrate for 18h to obtain polypyrrole-graphene-polyvinyl alcohol composite airgel.

[0047] The conductivity of the ...

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Abstract

The invention discloses a preparation method of polypyrrole-graphene-polyvinyl alcohol composite aerogel. The preparation method comprises the following steps: (1) dispersing graphene oxide into a dispersing agent, to obtain graphene oxide dispersed liquid with a certain concentration; (2) adding pyrrole, a glutaraldehyde solution and a polyvinyl alcohol solution into the graphene oxide dispersed liquid obtained in the step (1) in sequence, uniformly stirring the components, and allowing the uniform mixture to stand still for a period of time; (3) cyclically freezing and defreezing a composite obtained in the step (2) at low temperature and normal temperature for multiple times, to obtain pyrrole-graphene oxide-polyvinyl alcohol composite aerogel; (4) putting the composite aerogel obtained in step (3) into an oxidant and hydrazine hydrate in sequence, to obtain the polypyrrole-graphene-polyvinyl alcohol composite aerogel. The preparation process of the preparation method is simple; the obtained composite aerogel is extremely high in electrochemical performance and compression resilience, and can be used for producing novel electronic devices such as a compressible supercapacitor.

Description

technical field [0001] The invention belongs to the field of material preparation and relates to a preparation method of polypyrrole-graphene-polyvinyl alcohol composite airgel. Background technique [0002] Polyvinyl alcohol is a widely used water-soluble polymer, non-toxic, non-irritating, its molecular chain contains a large number of hydroxyl groups, strong polarity, easy to form hydrogen bonds, so it has a good hydrophilic type, its performance Between rubber and plastic. However, polyvinyl alcohol itself has low strength, heat resistance, and poor water resistance, which limit the application of polyvinyl alcohol in many aspects. [0003] As a representative of conductive polymers, polypyrrole is a conjugated large π bond system composed of alternating single and double bonds, which has special physical and chemical properties and has good application prospects in optoelectronic devices, sensors and other fields. However, pure polypyrrole is insoluble in water, has p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L79/04C08K3/04C08J9/00C08G73/06
CPCC08G73/0611C08J9/00C08J2205/026C08J2329/04C08J2379/04C08J2429/04C08J2479/04C08L29/04C08L79/04C08K3/04
Inventor 李亮刘玉兰朱芬喻湘华张桥刘仿军黄华波
Owner WUHAN INSTITUTE OF TECHNOLOGY
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