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Preparation method of polyaniline nanofiber array

A technology of nanofiber array and polyaniline, which is applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, textiles and papermaking, etc., can solve unfavorable industrial production, high energy consumption, and lack of polyaniline nanofibers. Sequenced array structure and other issues to achieve good hydrophobic/hydrophilic transition performance and large specific surface area

Inactive Publication Date: 2010-09-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the hard template method, there are two disadvantages: ① after the reaction is completed, the removal of the template is cumbersome; ② after the removal of the template, the ordered structure of the polymer may collapse
For the three-step electrodeposition method, due to its high energy consumption, low yield of polyaniline, and the inability to obtain a large-area ordered array structure of polyaniline nanofibers, it is only suitable for experimental research and is not conducive to industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Soak the polystyrene substrate in ethanol for 10 minutes, then rinse it with deionized water and put it in an oven to dry for use;

[0022] 2. Immerse the polystyrene substrate obtained in step 1. into an aniline aqueous solution with a mass percentage of 0.5%, and swell for 12 hours;

[0023] 3) prepare the ferric nitrate aqueous solution that the molar concentration is 0.5mol / L, take out the aniline-swelled polystyrene substrate in step 2., rinse with deionized water to remove the surface aniline monomer, and then put into the prepared ferric nitrate aqueous solution The reaction was carried out for 3 h, and the reaction temperature was controlled at 0° C. After the reaction, the substrate was taken out, washed with deionized water, and dried to obtain a polyaniline nanofiber array grown on the polystyrene substrate.

Embodiment 2

[0025] 1. Take the polymethyl methacrylate substrate and soak it in ethanol-acetone mixed solution for 20 minutes, then rinse it with deionized water and put it in an oven to dry for later use;

[0026] 2. Immerse the substrate obtained in step 1. into an aniline aqueous solution with a mass percentage of 1.25%, and swell for 18 hours;

[0027] 3. The ammonium persulfate aqueous solution with a molar concentration of 1.25 mol / L is prepared, and the aniline-swelled polymethyl methacrylate substrate in step 2) is taken out, and the surface aniline monomer is rinsed with deionized water to remove the surface aniline monomer, and then put into the prepared solution. The ammonium persulfate solution was reacted for 12 hours, and the reaction temperature was controlled at 20 °C. After the reaction, the substrate was taken out, washed with deionized water, and dried to obtain a polyaniline nanofiber array grown on the polymethyl methacrylate substrate.

Embodiment 3

[0029] 1. Take a glass sheet as a carrier, first perform ethanol ultrasonic cleaning treatment on it, configure a toluene solution with a mass concentration of 1% polystyrene, and then use a dip coating method to coat the polystyrene solution on it, and dry to obtain polystyrene Composite substrate with glass sheet;

[0030] 2. The substrate obtained in step 1) was immersed in an aniline aqueous solution with a mass percentage of 2%, and swelled for 24 hours;

[0031] 3) Prepare a ferric sulfate aqueous solution with a molar concentration of 2.0 mol / L, take out the aniline swollen substrate in step 2), rinse with deionized water to remove the surface aniline monomer, and then put it into the prepared ferric sulfate solution to react for 24h , the reaction temperature was controlled at 40° C., the substrate was taken out after the reaction, washed with deionized water, and dried to obtain a polyaniline nanofiber array grown on the substrate.

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PUM

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Abstract

The invention relates to a preparation method of a polyaniline nanofiber array, which belongs to the technical field of the conductive polymer. The preparation method comprises the following process steps: using a polymer substrate or a prepared composite polymer substrate to prepare aniline emulsion of a certain concentration, placing the slide into the aniline emulsion, taking out the slide after swelling for a certain period, then placing the slide into oxidant solution of a certain concentration, reaction and assembly, thereby preparing the polyaniline nanofiber array. The method has the advantages that: (1) the large-area polyaniline nanofiber array can be obtained; and (2) the utilization rate of aniline is high, thereby saving the cost. The obtained polyaniline nanofiber array has the advantages of large surface area, high conductivity and the like, and has broad application prospects in sensors, energy storage and the like.

Description

technical field [0001] The invention belongs to the technical field of conductive polymers, and particularly relates to a preparation method of a polyaniline nanofiber array. Background technique [0002] Among the conductive polymers, polyaniline has attracted attention due to its unique conductive properties (transition from conductive state to insulating state through doping / dedoping), good environmental stability, low price and simple synthesis. Widespread concern. However, the polyaniline synthesized by traditional methods has a granular aggregated structure, and its insolubility greatly limits its wide application in technology. One of the most common methods to solve this problem is to use an appropriate method to synthesize polyaniline nanofibers, and then combine them with other Easy-to-process material blends. [0003] At present, there are many methods for synthesizing nanostructured polyaniline. The most representative one is: the soft template self-assembly me...

Claims

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Application Information

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IPC IPC(8): C08J7/02D01F6/76C08G73/02
Inventor 杨穆王戈向召军
Owner UNIV OF SCI & TECH BEIJING
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