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Preparation of polyaniline / argentum nano composite material

A composite material and silver nanotechnology, which is applied in the field of preparation of polyaniline/silver nanocomposite materials, can solve the problem of uneven distribution of silver particles, and achieve the effects of simple equipment, simple production process and low equipment investment.

Inactive Publication Date: 2009-01-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to propose a new method for the preparation of polyaniline / silver nanocomposites, especially using hydrogen peroxide as an oxidant to initiate aniline polymerization, and simultaneously as a reducing agent to reduce silver nitrate, and to prepare polyaniline / silver by ultrasonic chemistry The method of nanocomposite materials; solves the problem that silver particles are easy to agglomerate and the silver particles are unevenly distributed in the polyaniline matrix in the compound obtained by in-situ reduction or in-situ polymerization of a certain component; provides a simple production process and easy operation Preparation method of polyaniline / silver nanocomposite material with convenience and low equipment investment

Method used

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  • Preparation of polyaniline / argentum nano composite material
  • Preparation of polyaniline / argentum nano composite material
  • Preparation of polyaniline / argentum nano composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Used silver nitrate (analytical pure), its main component (%) is: AgNO 3 ≥99.8%, water insoluble ≤0.005%, chloride ≤0.001%, sulfate ≤0.004%, Fe≤0.0004%, Cu≤0.001%, Pb≤0.001%, hydrochloric acid non-precipitate ≤0.02%.

[0032] Weigh 4.25g AgNO 3 Dissolve in 50mL distilled water to make 0.5mol / L AgNO 3 solution; weigh 2.33g aniline, and add 50mL 1mol / L nitric acid solution to obtain the nitric acid solution of aniline; under magnetic stirring, add the nitric acid solution of aniline dropwise to AgNO 3 In the solution, after 10 minutes of dripping, the mixture was obtained and magnetic stirring was continued. Pre-measure 26mLv / v30% H 2 o 2 , make up to 50mL with distilled water, add it dropwise to AgNO 3 In the mixed solution with aniline, after 20 minutes of dripping, a milky white solution was obtained. Then it was placed in an ultrasonic reactor, and after ultrasonication for 5 hours, a large amount of green precipitate was obtained, which was left to stand for 96...

Embodiment 2

[0034] Used silver nitrate (analytical pure), its main component (%) is: AgNO 3 ≥99.8%, water insoluble ≤0.005%, chloride ≤0.001%, sulfate ≤0.004%, Fe≤0.0004%, Cu≤0.001%, Pb≤0.001%, hydrochloric acid non-precipitate ≤0.02%.

[0035] Weigh 6.375g AgNO 3 Dissolve in 50mL distilled water to make 1.0mol / L AgNO 3 solution; weigh 2.33g aniline, and add 50mL 1mol / L nitric acid solution to obtain the nitric acid solution of aniline; under magnetic stirring, add the nitric acid solution of aniline dropwise to AgNO 3 In the solution, after 10 minutes of dripping, the mixture was obtained and magnetic stirring was continued. Pre-measure 26mLv / v30% H 2 o 2 , make up to 50mL with distilled water, add it dropwise to AgNO 3 In the mixed solution with aniline, after 20 minutes of dripping, a milky white solution was obtained. Then it was placed in an ultrasonic reactor, and after ultrasonication for 5 hours, a large amount of green precipitate was obtained, which was left to stand for 9...

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Abstract

The invention relates to a preparation method of a polyaniline / Ag nanometer composite material, in particular to the method of adopting hydrogen peroxide as the oxidant to induce aniline to polymerize and as the reducing agent to reduce silver nitrate, and utilizing the sonochemical method to prepare polyaniline / Ag nanometer composite material. Nitric acid is added into aniline to make the nitric acid solution of aniline; while magnetic stirring, the nitric acid solution of aniline is dripped into the silver nitrate solution; while further magnetic stirring, the prepared hydrogen peroxide solution is dripped into the mixture; and then the mixture is put in an ultrasonic reactor after dripping is finished for ultrasonication, standing, and then conducting centrifugal separation, solid washing and drying to get green powder. The invention designs to use the double situ-compound method of adopting hydrogen peroxide as the oxidant to induce aniline to polymerize and as the reducing agent to reduce silver nitrate; as the reaction is very slow under magnetic stirring, therefore, the energy produced by ultrasonication is used for speeding up the reaction. The method has simple production process, convenient operation and less equipment investment, and better solves the agglomeration problem of silver nanometer particles; the silver nanometer particles in the obtained composite material can evenly distribute in the polyaniline matrix.

Description

technical field [0001] The invention relates to a new preparation method of polyaniline / silver nano composite material. Background technique [0002] Composite materials formed by polymers and inorganic nanoparticles can make full use of the complementary advantages of the two properties, and thus become an important way for the multifunctionalization of traditional materials and the development of new materials. Among them, the composite material of conductive polymer and metal nanoparticles is one of the hotspots in the research of nanomaterials. Among the many conductive polymer materials, polyaniline has cheap raw materials, simple synthesis, good high temperature resistance and oxidation resistance, and variable conductivity, so it shows broad application prospects in many fields. Among many metals, silver exhibits excellent electrical and thermal conductivity. Silver nanoparticles are widely used in various electronic components such as catalysis, conductive ink, con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K3/08C08G73/02
Inventor 李芝华王炎伟
Owner CENT SOUTH UNIV
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