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Preparation method of nano-fiber poly-aniline

A technology for nanofibers and polyaniline, which is applied in the field of preparing nanofiber polyaniline by electrochemical methods, can solve the problems of poor stability and decreased activity of PANI, and achieve the effects of good reproducibility, short reaction time and simple operation.

Inactive Publication Date: 2011-01-12
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention, by improving the existing electrochemical method, avoids the problem that the film produced during the polymerization of nanofiber PANI is converted between a low reduction state and a peroxidation state, which causes the film to undergo peroxidative hydrolysis, resulting in a decrease in activity and poor stability of PANI. , the purpose of which is to provide a new method for the preparation of nanofiber polyaniline

Method used

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  • Preparation method of nano-fiber poly-aniline

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Step 1, dissolving 9.3598g of aniline monomer in 250ml of aqueous solution to form aniline aqueous solution A with a molar concentration of 0.4mol / L;

[0027] Step 2, dissolving the concentrated sulfuric acid of 50.865g in the water of 500ml is configured into the sulfuric acid aqueous solution B of 1.0mol / L;

[0028] Step 3. At room temperature, take 20ml of solution A and 20ml of solution B into a beaker and stir evenly;

[0029] Step 4, using a three-electrode system (the counter electrode is a platinum sheet, and the working electrode is a 0.5cm 2 Platinum sheet, saturated calomel electrode as reference electrode). Set the unipolar pulse signal as follows: pulse voltage = 1.0V, on-time 0.4s, pulse cut-off time 0.4s, current is zero (open circuit voltage), pulse times = 375;

[0030] Step 5, take out the prepared polyaniline membrane electrode, rinse it with distilled water, and dry it at room temperature for 48 hours to obtain polyaniline nanofibers doped with sul...

Embodiment 2

[0032] (1) 9.3598g of aniline monomer is dissolved in 250ml of aqueous solution to be configured as an aniline aqueous solution A with a molar concentration of 0.4mol / L;

[0033] (2) The concentrated sulfuric acid of 50.865g is dissolved in the water of 500ml and is configured into the sulfuric acid aqueous solution B of 1mol / L;

[0034] (3) At room temperature, take 25ml of solution A and 25ml of solution B into a beaker and stir evenly;

[0035] (4) A three-electrode system is adopted (the counter electrode is a glassy carbon electrode, and the working electrode is 0.5cm 2 Platinum sheet, saturated calomel electrode as reference electrode). Set the unipolar pulse signal as: pulse voltage 0.9V, on-time 0.4s, pulse cut-off time 0.4s, current is zero (open circuit voltage), pulse times=400;

[0036] (5) Take out the prepared polyaniline membrane electrode, rinse it with distilled water, and dry it at room temperature for 48 hours to obtain polyaniline nanofibers doped with su...

Embodiment 3

[0038] (1) 11.6997g of aniline monomer is dissolved in 250ml of aqueous solution to be configured as an aniline aqueous solution A with a molar concentration of 0.5mol / L;

[0039] (2) The concentrated sulfuric acid of 50.865g is dissolved in the water of 500ml and is configured into the sulfuric acid aqueous solution B of 1mol / L;

[0040] (3) At room temperature, take 30ml of solution A and 30ml of solution B into a beaker and stir evenly;

[0041] (4) A three-electrode system is adopted (the counter electrode is platinum mesh, the working electrode is 0.5cm 2 Platinum sheet, saturated calomel electrode as reference electrode). Set the unipolar pulse signal as: pulse voltage 0.85V, on-time 0.4s, pulse cut-off time 0.3s, current zero (open circuit voltage), pulse times=500;

[0042] (5) Take out the prepared polyaniline membrane electrode and rinse it with distilled water, and dry it at room temperature for 48 hours to obtain polyaniline nanofibers doped with sulfuric acid, t...

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Abstract

The invention discloses a preparation method of nano-fiber poly-aniline. In the method, an aniline monomer and inorganic acid are used as raw materials to prepare the nano-fiber poly-aniline through oxidative polymerization by using an electrochemical unipolar pulse method under a room temperature condition. The preparation method is simple to operate, needs no oxidant and gets rid of secondary pollution caused by the oxidant. A product prepared by the method has high electrochemical stability and super capacitive performance.

Description

technical field [0001] The invention relates to a method for preparing nanofiber polyaniline, in particular to a method for preparing nanofiber polyaniline by an electrochemical method. Background technique [0002] Polyaniline (PANI) has good conductivity, high stability, low monomer cost, easy synthesis, and can be incorporated into the purpose functional group in the electrochemical polymerization process, so that it occupies an important role in the conductive polymer. It has a very important position and has become a research hotspot in the field of conductive polymers. PANI nanofiber not only has the above properties of PANI, but also has excellent physical properties such as tiny pore size, narrow pore size distribution and large specific surface area. It is used as a modified electrode material in electrochemical sensors, capacitors, ion exchange, and secondary It has a very broad application prospect in secondary batteries, electrochromism, and metal anticorrosion....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C25B3/00
Inventor 郝晓刚李越赵凯王忠德张忠林刘世斌樊彩梅申迎华
Owner TAIYUAN UNIV OF TECH
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