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Tungsten carbide/conductive polyaniline composite particle and preparation method thereof

A technology of tungsten carbide particles and conductive polyaniline, which is applied in the field of tungsten carbide/conductive polyaniline composite particles and their preparation, can solve the problems of high price of precious metals, limited use of widely used, high production cost, etc., and achieves low cost and simple preparation process. Easy and stable effect

Inactive Publication Date: 2009-09-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, precious metals are expensive and expensive to produce, limiting their widespread use

Method used

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  • Tungsten carbide/conductive polyaniline composite particle and preparation method thereof
  • Tungsten carbide/conductive polyaniline composite particle and preparation method thereof
  • Tungsten carbide/conductive polyaniline composite particle and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] ①Preparation of tungsten carbide seed particles: disperse 0.235g tungsten carbide into 25mL water, add 0.1g polyvinyl alcohol, and raise the temperature to 60°C for 0.5 hours, then turn to ultrasonic dispersion for 30 minutes to obtain tungsten carbide emulsion;

[0024] ②Swelling of aniline monomer in tungsten carbide particles: Add 4.7g of aniline to 25mL water, ultrasonically disperse and stir for 15 minutes, then add the tungsten carbide emulsion obtained in step ①, continue ultrasonically disperse and stir for 30 minutes to obtain a mixed emulsion;

[0025] ③ Aniline is polymerized on the surface of tungsten carbide particles to form composite particles: under magnetic stirring, transfer the mixed emulsion prepared in step ② to a three-necked bottle, and after the system is cooled to 15°C in an ice-water bath, continue to stir for 15 minutes; then Add 16mL of ammonium persulfate solution with a concentration of 2.5mol / L, start to add 40mL of sulfuric acid solution w...

Embodiment 2

[0027] ①Preparation of tungsten carbide seed particles: disperse 0.9g tungsten carbide into 25mL water, add 0.3g polyvinyl alcohol, and raise the temperature to 70°C for 1.5 hours with magnetic stirring, then turn to ultrasonic dispersion for 40 minutes to obtain tungsten carbide emulsion;

[0028] ②Swelling of aniline monomer in tungsten carbide particles: Add 2.5g of aniline into 25mL of water, ultrasonically disperse and stir for 20 minutes, then add the tungsten carbide emulsion obtained in step ①, continue ultrasonically dispersing and stir for 40 minutes to obtain a mixed emulsion;

[0029] ③ Aniline is polymerized on the surface of tungsten carbide particles to form composite particles: under magnetic stirring, transfer the mixed emulsion prepared in step ② to a three-necked bottle, and after the system is cooled to 10°C in an ice-water bath, continue to stir for 20 minutes; then Add 21.5mL of hydrogen peroxide solution with a concentration of 1.25mol / L, and start to dro...

Embodiment 3

[0031] ①Preparation of tungsten carbide seed particles: disperse 1.75g ​​tungsten carbide into 25mL water, add 0.5g polyvinyl alcohol, and raise the temperature to 75°C for 2.5 hours with magnetic stirring, then switch to ultrasonic dispersion for 80 minutes to obtain tungsten carbide emulsion;

[0032] ②Swelling of aniline monomer in tungsten carbide particles: Add 5g of aniline into 25mL of water, ultrasonically disperse and stir for 30 minutes, then add the tungsten carbide emulsion obtained in step ①, continue ultrasonically disperse and stir for 45 minutes to obtain a mixed emulsion;

[0033] ③ Aniline is polymerized on the surface of tungsten carbide particles to form composite particles: under magnetic stirring, transfer the mixed emulsion prepared in step ② to a three-necked bottle, and after the system is cooled to 20°C in an ice-water bath, continue to stir for 30 minutes; then Add 107 mL of potassium iodate solution with a concentration of 1 mol / L, and start to drop ...

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Abstract

The invention relates to a tungsten carbide / conductive polyaniline composite particle and a preparation method thereof. In the composite particle, the mass ratio of the tungsten carbide particle to the polyaniline is 0.05 to 0.36; and the tungsten carbide particle is coated by the polyaniline. The preparation method comprises the following steps: adding the tungsten carbide emulsion into mixed solution of aniline and water, carrying out ultrasonic dispersion and stirring, leading the aniline to swell into the tungsten carbide particle, adding aqueous solution of oxidant, dripping aqueous solution of acid, leading the aniline to be polymerized on the surface of the tungsten carbide particle, thus forming the tungsten carbide / conductive polyaniline composite particle. The tungsten carbide / conductive polyaniline composite particle has good conductivity, catalytic activity, stability and electrochemical property, has simple and easy implementation of preparation technique and low cost and can be used as electrode materials, secondary batteries, catalytic materials and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a tungsten carbide / conductive polyaniline composite particle with a core-shell structure and a preparation method thereof. Background technique [0002] Composite materials formed by polymers and inorganic particles can make full use of the complementary properties of the two, and thus become an important way to functionalize traditional materials and develop new materials. In recent years, research on conductive polymer / inorganic particle composites has attracted people's attention. This new type of composite material not only retains the advantages of polymer materials, but also exerts the unique properties of inorganic particles. It is a composite material with good mechanical properties and unique optical, electrical and magnetic properties, thus broadening the application of polymer materials. field. [0003] Among the many conductive polymer materials, polyanili...

Claims

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Application Information

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IPC IPC(8): C08L79/02C08K3/14C08G73/02
Inventor 郭忠诚黄惠
Owner KUNMING UNIV OF SCI & TECH
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