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Method for preparing sheet polypyrrole with high conductivity

A technology of high conductivity and polypyrrole, which is applied in the direction of circuits, capacitors, electrical components, etc., can solve the problems of inability to obtain high specific capacitance, unsatisfactory conductivity, application restrictions, etc., and achieve easy scale-up production and simple equipment , the effect of easy operation

Inactive Publication Date: 2013-12-04
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the conductivity of such conductive polymers is not satisfactory, and high specific capacitance cannot be obtained when applied to supercapacitor electrode materials; on the other hand, the application of one-dimensional conductive polymers in the anticorrosion of alloys and metals is limited

Method used

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  • Method for preparing sheet polypyrrole with high conductivity
  • Method for preparing sheet polypyrrole with high conductivity
  • Method for preparing sheet polypyrrole with high conductivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of high-conductivity flaky polypyrrole, comprising the following steps:

[0026] (1) 1 mg of sulfonic acid functionalized graphene (see Ding B, Lu XJ, Yuan CZ, Yang SD, Han YQ, Zhang XG, Che Q. One-step electrochemical composite polymerization of polypyrrole integrated with functionalized graphene / carbon for the preparation method nanotubes nanostructured composite film for electrochemical capacitors. Electrochim. Acta, 2012, 62:132-139.) were dispersed in 20mL of water, stirred and dispersed by ultrasonic waves to prepare a graphene dispersion, ready for use.

[0027] (2) Inject 300 mg (4.4776 mmol) of pyrrole (purchased from Aldrich, Germany) monomer into the graphene dispersion in step (1), stir and disperse with ultrasonic waves to form a reaction system, and set aside.

[0028] (3) Dissolve 1.022g (4.4776mmol) of ammonium persulfate (purchased from Sinopharm Chemical Reagent Co., Ltd.) in 20mL of water to make a solution, and add it dropwise to...

Embodiment 2

[0031] The difference between Example 2 and Example 1 is that 1 mg of sulfonic acid functionalized graphene in step (1) becomes 2 mg of sulfonic acid functionalized graphene, and 300 mg (4.4776 mmol) of pyrrole monomer in step (2) becomes 400 mg (5.9701 mmol) of pyrrole monomer, 1.022 g (4.4776 mmol) of ammonium persulfate in step (3) became 3.2276 g (11.9402 mmol) of potassium persulfate. The dropping rate of 0.02 mL / min becomes the dropping rate of 0.05 mL / min. 30°C in step (4) was changed to 25°C.

Embodiment 3

[0033] The difference between Example 3 and Example 1 is that 1 mg of sulfonic acid functionalized graphene in step (1) becomes 4 mg of sulfonic acid functionalized graphene, and 300 mg (4.4776 mmol) of pyrrole monomer in step (2) becomes 400 mg (5.9701 mmol) pyrrole monomer, 1.022 g (4.4776 mmol) ammonium persulfate in step (3) became 1.4525 g (8.9552 mmol) anhydrous ferric chloride. The dropping rate of 0.02 mL / min becomes the dropping rate of 0.1 mL / min. In step (4), the temperature of 30°C was changed to 15°C, and the reaction time of 12 hours was changed to 24 hours.

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Abstract

The invention relates to a method for preparing sheet conducting polypyrrole with high conductivity. The method comprises the following steps: dispersing a trace amount of sulfonic acid functionalized graphene into deionized water; stirring and uniformly dispersing the sulfonic acid functionalized graphene through ultrasonic waves; injecting pyrrole monomers into the sulfonic acid functionalized graphene solution; continuing to stir, and adding an oxidizing agent after ultrasonic dispersion; conducting an reaction for 6-24 hours at 0-30 DEG C under a stirring condition to obtain the conducting polypyrrole with a sheet structure. The oxidizing agent is any one of ammonium persulfate, potassium persulfate, ferric chloride anhydrous, iron nitrate nonahydrate and anhydrous ferric sulfate. The method utilizes a chemical action between the functional groups on the surface of the functionalized graphene nanosheets and the pyrrole monomers to induce the pyrrole monomers polymerize into the polypyrrole with the sheet structure, and the functionalized graphene plays roles of a seed template and a doping agent at the same time. The prepared polypyrrole can obtain the high conductivity and specific capacitance and can be used as a metal anti-corrosion material or the electrode material of a super capacitor.

Description

technical field [0001] The present invention relates to a conductive polymer material, specifically, it uses sulfonic acid functionalized graphene nanosheets to induce and prepare conductive polypyrrole with a sheet-like structure through an in-situ polymerization method. This high-conductivity sheet-like polypyrrole can be applied For metal anticorrosion or supercapacitor electrode materials. Background technique [0002] Conductive polymer nano / microstructures have attracted attention due to the advantages of both low-dimensional materials and organic conductors. As a typical conductive polymer, polypyrrole has the advantages of good environmental stability, high conductivity, and easy synthesis. The synthesis of nano / microstructure polypyrrole has aroused great interest. In recent years, polypyrrole with ordered and specific morphology, such as tubes, wires, rods, ribbons, and fibers, has attracted much attention due to its unique properties and applications in electrica...

Claims

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Application Information

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IPC IPC(8): C08G73/06C08K9/04C08K3/04H01G9/042
CPCY02E60/13
Inventor 韩永芹申明霞郭义段鹏鹏袁宗阳
Owner HOHAI UNIV
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