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Preparation method of conductive polymer polyanilinc nano fiber

A conductive polymer, nanofiber technology, applied in the direction of chemical characteristics of fibers, single-component synthetic polymer rayon, textiles and papermaking, etc. and other problems, to achieve the effect of high yield, simple operation and easy application

Inactive Publication Date: 2006-06-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the monomer concentration cannot be too high, and it is difficult to achieve large-scale synthesis
The preparation process of this method is complex and the yield is small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: First, 1 part of aniline monomer and 4 parts of ammonium persulfate are dissolved in 200 parts of hydrochloric acid with a mass percentage concentration of 26% respectively to obtain a solution of aniline and ammonium persulfate; Under the action of ultrasonic waves, ammonium persulfate solution was added dropwise, and the reaction temperature was controlled to be 15°C. After the dropwise addition, the reaction was continued for 5 hours, filtered and washed to remove water-soluble impurities, and dried at 48°C to obtain polyaniline nanofibers; The obtained polyaniline nanofibers were placed in ammonia water with a concentration of 10% by mass and treated for 1 hour, and the amount of ammonia water was added to make the pH value of the treatment liquid 10. After the end, the polyaniline nanofibers were filtered and washed until the filtrate was neutral, and dried at 50°C to obtain the intrinsic State polyaniline nanofibers; take 100 parts and 50 parts of the...

Embodiment 2

[0018]Embodiment 2: firstly, 3 parts of aniline monomer and 10 parts of ammonium dichromate are dissolved in 20 parts of mass percent concentration of 14% sulfuric acid and 350 parts of mass percent concentration of 20% sulfuric acid to obtain aniline and ammonium dichromate solution; place the aniline solution under the action of ultrasonic waves with a frequency of 150kHz, then quickly add ammonium dichromate solution, and control the reaction temperature to 0°C, continue to react for 3 hours after mixing, filter and wash to remove water-soluble impurities , drying at 42°C to obtain polyaniline nanofibers; placing the gained polyaniline nanofibers in ammonia water with a mass percent concentration of 6% for 0.8 hours, adding the amount of ammonia water to make the pH of the treatment solution 9, and filtering and washing after the end Until the filtrate is neutral, dry at 48°C to obtain intrinsic polyaniline nanofibers; take 100 parts and 30 parts of the above intrinsic polya...

Embodiment 3

[0019] Embodiment 3: first 2 parts of aniline monomers and 15 parts of potassium dichromate are dissolved in 180 parts of mass percent concentration respectively in the aqueous solution of 5% dichloroacetic acid, obtain the solution of aniline and potassium dichromate; Place under the action of an ultrasonic field with a frequency of 800kHz, then quickly add potassium dichromate solution dropwise, and control the reaction temperature at 5°C, continue to react for 0.5 hours after the addition, filter, wash, remove water-soluble impurities, and dry at 50°C Obtaining polyaniline nanofibers; placing the gained polyaniline nanofibers in ammonia water with a mass percentage concentration of 2% for 1.3 hours, adding the amount of ammonia water to make the pH value of the treatment solution 8, filtering and washing until the filtrate is neutral after the end, Dry at 42°C to obtain intrinsic polyaniline nanofibers; take 100 parts and 10 parts of the above intrinsic polyaniline nanofiber...

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PUM

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Abstract

The invention relates to a conduction macromolecule polyaniline nanometer fiber manufacturing method. It includes the following steps: respectively dissolving aniline and oxidant in acid with water medium; mixing them with action of ultrasonic wave, and controlling temperature at¿C5-30 centigrade degree to do aniline polyreaction; gaining doping state polyaniline nanometer fiber when it finishes; removing the water and solubility impurity; drying; using ammonia liquor to neutralize the doping state; filtering; washing; drying; gaining eigenstate polyaniline nanometer fiber; processing it by dopant to gain conduct state; drying to gain powdery purpose. The invention adopts ultrasonic wave in polyreaction to gain polyaniline fiber with 20-100nm diameter, 500-5000nm length. The method has simple operation, and high yield.

Description

technical field [0001] The invention relates to a preparation method of nanofibers, in particular to a preparation method of conductive polymer polyaniline nanofibers. Background technique [0002] According to the definition of the National Science Foundation of the United States (Rocco MC, William RS, Alivisiatos P, editors, Nanotechnology Research Directions: IWGN Workshop Report, National Science and Technology Council, September 1999), nanomaterials refer to materials with at least one dimension less than or equal to 100nm. Material. Thus, nanofibers are fibers with a diameter less than or equal to 100 nm. Nanofibers have the characteristics of extremely high specific surface area, excellent flexibility, and super strong unidirectional tensile strength. Nanofibers are of great significance in both basic research and practical applications. In the field of life sciences and biomaterials, nanofibers are the basic unit of organisms, such as DNA with a diameter of 1.5nm a...

Claims

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Application Information

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IPC IPC(8): D01F6/58C08G73/02C08K3/16
Inventor 井新利王杨勇
Owner XI AN JIAOTONG UNIV
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