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A kind of preparation method of ultralong polypyrrole nanofiber

A polypyrrole nanofiber technology, which is applied in the field of preparation of ultra-long polypyrrole nanofibers, can solve the problems of limiting the application of polypyrrole nanofibers forming ability and the like, and achieves the effects of adapting to large-scale production, being easy to implement and simple to operate.

Active Publication Date: 2021-05-25
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a fine scale greatly limits the forming ability of polypyrrole nanofibers and its application in electronic components

Method used

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  • A kind of preparation method of ultralong polypyrrole nanofiber
  • A kind of preparation method of ultralong polypyrrole nanofiber
  • A kind of preparation method of ultralong polypyrrole nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 1 mL of pyrrole monomer into 60 mL of hydrochloric acid solution with a concentration of 1 mol / L, and stir the solution for 5 minutes at a speed of 800 r / min to achieve the effect of uniformly dispersing the pyrrole monomer. Then inject 1 mL of vanadium pentoxide gel into the pyrrole monomer solution at a rate of 1 mL / second under stirring, and keep the reaction for 1-2 minutes. Then 1.09 g of ammonium persulfate was added to the reaction solution, and the reaction was continued for 1 hour while stirring. After the reaction was completed, the reaction solution was placed in a Buchner funnel and vacuum filtered to separate the product. Then, the product is washed with hydrochloric acid, deionized water, and ethanol in the order, and the amount of solvent used for each washing is at least 30 mL, and the washing process is repeated at least three times. After washing, the product is dried in an oven at 45°C for 12 hours to obtain polypyrrole nanofibers with a length o...

Embodiment 2

[0043] Add 1 mL of pyrrole monomer to 60 mL of 0.5 mol / L hydrochloric acid solution, and stir the solution for 5 minutes at a speed of 1000 r / min to achieve the effect of uniformly dispersing the pyrrole monomer. Then inject 2 mL of vanadium pentoxide gel into the pyrrole monomer solution at a rate of 1 mL / sec under stirring, and keep the reaction for 1-2 minutes. Then 1.0 g of ferric chloride was added into the reaction solution, and the reaction was continued for 1 hour while stirring. After the reaction was completed, the reaction solution was placed in a Buchner funnel and vacuum filtered to separate the product. Then, the product is washed with hydrochloric acid, deionized water, and ethanol in the order, and the amount of solvent used for each washing is at least 30 mL, and the washing process is repeated at least three times. After washing, the product is dried in an oven at 45°C for 12 hours to obtain polypyrrole nanofibers with a length of 0.5-2 cm.

Embodiment 3

[0045]Add 1 mL of pyrrole monomer into 60 mL of a mixed solution of hydrochloric acid and ethanol water with a concentration of 1 mol / L (the volume ratio of ethanol and water is 1:5, the volume of hydrochloric acid is 50 mL, and the volume of ethanol aqueous solution is 10 mL), at 800 r / min The solution was stirred for 3 minutes to achieve the effect of uniformly dispersing the pyrrole monomer. Then inject 1 mL of vanadium pentoxide gel into the pyrrole monomer solution at a rate of 1 mL / second under stirring, and keep the reaction for 1-2 minutes. Then add 4mLH 2 o 2 Hydrogen peroxide with a mass concentration of 30% was added to the reaction solution, and the reaction was continued for 1 hour while stirring. After the reaction was completed, the reaction solution was placed in a Buchner funnel and vacuum filtered to separate the product. Then, the product is washed with hydrochloric acid, deionized water, and ethanol in the order, and the amount of solvent used for each w...

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Abstract

The invention discloses a preparation method of ultra-long polypyrrole nanofibers. The ultra-long polypyrrole nanofiber comprises the following steps: mixing pyrrole monomer with a solvent, reacting the obtained pyrrole monomer solution with vanadium pentoxide sol, and then reacting with an oxidant to obtain centimeter-level polypyrrole nanofiber. The invention provides a method for preparing polypyrrole nanofibers with a centimeter-level length, and the method has the characteristics of simple operation, easy realization and the like. Compared with conventional powdered polypyrrole nanofibrous particles, this ultralong conductive nanofiber can be directly used in chemical, stress, electrical resistance and other sensing devices.

Description

technical field [0001] The invention relates to a polypyrrole nanofiber, in particular to a preparation method of an ultra-long polypyrrole nanofiber. Background technique [0002] The conductive polymer polypyrrole has good electrical conductivity, mechanical properties, chemical stability and processability, and has been widely used in the fields of electronic components, sensors, electromagnetic shielding and anti-corrosion coatings. By preparing polypyrrole into the shape of nanofibers, its specific surface area can be effectively increased, thereby further improving its performance. [0003] The preparation methods of polypyrrole nanofibers currently used mainly include methods such as "interface polymerization", "template polymerization", and "seed polymerization". The length of polypyrrole nanofibers prepared by these methods is generally about several microns, and the diameter is generally about 100 nanometers. Such a fine scale greatly limits the shapeability of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06
CPCC08G73/0611
Inventor 刘杨张超
Owner SUN YAT SEN UNIV
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