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Method for preparing polypyrrole/ multi-wall carbon nano tube composite material with core-shell structure

A technology of multi-walled carbon nanotubes and composite materials, applied in the field of polypyrrole/multi-walled carbon nanotube composite materials, can solve the problems of refractory, insoluble pure PPy, low electrical conductivity, etc., and achieves low equipment requirements and a reaction system. Simple, easy-to-use effects

Inactive Publication Date: 2013-09-25
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure PPy is insoluble, infusible, and has low conductivity

Method used

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  • Method for preparing polypyrrole/ multi-wall carbon nano tube composite material with core-shell structure
  • Method for preparing polypyrrole/ multi-wall carbon nano tube composite material with core-shell structure
  • Method for preparing polypyrrole/ multi-wall carbon nano tube composite material with core-shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method for preparing a PPy / MWCNTs composite material with a core-shell structure, comprising the following steps:

[0030] (1), take 70 μ L of pyrrole and dissolve in 10 ml of n-hexane (solution concentration is 6.7 g / L), sonicate, and set aside;

[0031] (2), take 7.56mg MWCNTs (purchased from Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences) and add 10mL H 2 In O, obtain the MWCNTs aqueous solution that concentration is 0.75g / L, ultrasonic, standby; MWCNTs: pyrrole=1: 9 (mass ratio);

[0032] (3) Dissolve 0.12 g of ammonium persulfate (purchased from Sinopharm Chemical Reagent Co., Ltd.) in 10 mL of dichloromethane, sonicate, and set aside.

[0033](4), the MWCNTs aqueous solution obtained in step (2) is slowly injected along the container wall of step (3) (drop rate: 1-2mL / min), and then the n-hexane solution of pyrrole obtained in step (1) is also Slowly inject (dropping speed: 1-2mL / min), layering, and interfacial reaction, the upper...

Embodiment 2

[0035] In addition to changing the n-hexane in step (1) to benzene, the amount of MWCNTs in step (2) is 17mg, the 0.12g ammonium persulfate in step (3) is changed to 0.40g ferric nitrate nonahydrate, and the dichloromethane is changed to tetrachloride Carbon, except that the standing reaction of step (4) is changed to 12h for 24h, the remaining contents are the same as in Example 1, MWCNTs: pyrrole=1: 4 (mass ratio), and the concentration of MWCNTs aqueous solution is 1.7g / L, and the obtained The shell thickness of the composite material is 10-20nm.

Embodiment 3

[0037] Except that the amount of pyrrole used in step (1) was 20 μL, the amount of MWCNTs used in step (2) was 19.4 mg, and the static reaction of step (4) was changed from 24 h to 6 h, the rest of the content was the same as in Example 1, MWCNTs: pyrrole =1:1 (mass ratio), the shell thickness is 20-30nm.

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Abstract

The invention discloses a method for preparing a polypyrrole / multi-wall carbon nano tube composite material with a core-shell structure. The method comprises the following steps of: dissolving multi-wall carbon nano tubes into deionized water, dissolving pyrrole monomers into an organic solvent, dissolving an oxidant into a hydrophobic solvent, initiating polymerization by using the oxidant, generating a polypyrrole / multi-wall carbon nano tube composite material in an aqueous phase, and thus obtaining the polypyrrole / multi-wall carbon nano tube composite material with the core-shell structure by controlling the reaction conditions. The thickness of a polypyrrole shell layer can be conveniently controlled by adjusting the mass ratio of the pyrrole monomers to the multi-wall carbon nano tubes. The equipment is simple, and a surfactant and a template are not required in reaction operation. The prepared polypyrrole / multi-wall carbon nano tube composite material has high specific capacitance.

Description

technical field [0001] The present invention relates to a conductive polymer composite material, specifically, a polypyrrole / multi-walled carbon nanotube composite material with a core-shell structure is prepared by a three-phase interface polymerization method, and this composite material can be potentially applied to supercapacitor electrode materials . Background technique [0002] Polypyrrole (PPy) has been widely used in sensors, electronic devices, biomedicine and other fields due to its many advantages such as simple synthesis, good electrical conductivity and good environmental stability. However, pure PPy is insoluble, infusible, and has low conductivity. In order to improve the performance of PPy, PPy can be compounded with some inorganic nanoparticles. Multi-walled carbon nanotubes (MWCNTs) have excellent mechanical, electrical, electrochemical and other properties, and the skeleton structure contains sp 2 and sp 3 Hybridized carbon atoms, and there are a larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06C08K7/00C08K3/04C08L79/04
Inventor 韩永芹肖晋宜申明霞王圣武
Owner HOHAI UNIV