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Micro-nano silver/conductive polymer composite, preparation method thereof and application

A polymer conductive and composite material technology, which is applied in the field of micro-nano silver/polymer conductive composite materials and its preparation, can solve the problems of poor dispersion of silver powder and complicated preparation methods, and achieve simple and easy preparation methods with high particle size. Good controllability and good solubility

Inactive Publication Date: 2015-05-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are many reports about silver conductive nanocomposites in the prior art, such as a polyaniline / silver conductive nanocomposite and its preparation method disclosed in patent document 201010199426.6, but the problem of this method is that the preparation method is complicated, And need to react under the condition of ultraviolet light irradiation
Patent 200610050523.2 discloses a conductive composite material with silver nanowires and its preparation method, which is obtained by mixing and dispersing silver powder, silver nanowires and acrylic resin, but the method is to mix micron-sized silver powder and silver nanowires Use together to achieve good electrical conductivity, while micron-sized silver powder has the disadvantage of poor dispersion

Method used

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  • Micro-nano silver/conductive polymer composite, preparation method thereof and application
  • Micro-nano silver/conductive polymer composite, preparation method thereof and application
  • Micro-nano silver/conductive polymer composite, preparation method thereof and application

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Embodiment 1

[0031] (1) Dissolve silver nitrate in 100 times the mass of deionized water, heat to 60°C, add ammonia water dropwise, stop the dropwise addition when the produced precipitate is just completely dissolved and the solution is clear, to obtain silver ammonia solution, add it to the silver ammonia solution Add silver nitrate mass 3% surfactant sodium lauryl sulfate and mix evenly to obtain an emulsion, then add the reducing agent solution dropwise under stirring conditions, the reducing agent solution consists of 0.08mol / L potassium borohydride aqueous solution and 0.3mol / L The ascorbic acid aqueous solution is obtained by mixing potassium borohydride and ascorbic acid in a ratio of 1:1, and the ratio of the amount of reducing agent in the reducing agent solution to the amount of silver ion in the silver ammonia solution is 1:1. After the agent solution is added dropwise, continue to stir and react for 60 minutes, wash and separate the precipitate, and obtain micronano silver powd...

Embodiment 2

[0036] (1) Dissolve silver nitrate in 100 times the mass of deionized water, heat to 50°C, add ammonia water dropwise, stop the dropwise addition when the produced precipitate is just completely dissolved and the solution is clear, to obtain a silver ammonia solution, and pour it into the silver ammonia solution Add silver nitrate mass 5% surfactant sodium lauryl sulfate and mix evenly to obtain an emulsion, then add the reducing agent solution dropwise under stirring conditions, the reducing agent solution consists of 0.05mol / L potassium borohydride aqueous solution and 0.1mol / L The ascorbic acid aqueous solution is obtained by mixing potassium borohydride and ascorbic acid in a ratio of 1:1, and the ratio of the amount of reducing agent in the reducing agent solution to the amount of silver ion in the silver ammonia solution is 1:2. After the addition of the agent solution is completed, continue to stir and react for 30 minutes, wash and separate the precipitate, and obtain m...

Embodiment 3

[0040] (1) Dissolve silver nitrate in 100 times the mass of deionized water, heat to 80°C, add ammonia water dropwise, stop the dropwise addition when the generated precipitate is just completely dissolved and the solution is clear, to obtain a silver ammonia solution, add it to the silver ammonia solution Add silver nitrate mass 1% surfactant sodium dodecylsulfonate and mix evenly to obtain an emulsion, then add the reducing agent solution dropwise under stirring conditions, the reducing agent solution consists of 0.1mol / L potassium borohydride aqueous solution and 0.5mol / L The ascorbic acid aqueous solution of L is obtained by mixing potassium borohydride and ascorbic acid at a ratio of 1:1, and the ratio of the amount of reducing agent in the reducing agent solution to the amount of silver ion in the silver ammonia solution is 1:0.5. After the reducing agent solution is added dropwise, continue to stir and react for 40 minutes, wash and separate the precipitate, and obtain m...

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Abstract

The invention belongs to the technical field of composites, and discloses a micro-nano silver / conductive polymer composite, a preparation method thereof and an application. The preparation method of the composite includes the steps: (1) preparing silver-ammonia solution, adding surface-active agents into the silver-ammonia solution, uniformly mixing the silver-ammonia solution and the surface-active agents to obtain emulsion, dripping reducing agent solution under the condition of stirring, performing reaction for 30-60min after dripping, washing the solution and separating deposits to obtain micro-nano silver powder; (2) weighing polyester or acrylic acid resin and dissolving the resin by solvents to obtain polymer solution, dispersing the micro-nano silver powder in the solvents to obtain silver dispersion liquid, adding the silver dispersion liquid into the polymer solution, uniformly mixing the silver dispersion liquid and the polymer solution, and dispersing the solution for 5-30min by a three-roller machine to obtain the micro-nano silver / conductive polymer composite. The composite has the advantage of fine conductivity and can be applied to the field of conductive electrodes, touch screen electrodes, thin-film conductive switches and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a micro-nano silver / polymer conductive composite material and a preparation method and application thereof. Background technique [0002] The small size effect, quantum size effect and surface interface effect of silver micro-nano materials make it present unique optical, electrical, magnetic and acoustic properties. However, due to the large specific surface area of ​​silver micro-nano materials, it has high activity, which leads to easy oxidation and agglomeration, etc., which greatly reduces its application value and application range. The polymer material is an organic polymer structure, which has many advantages such as light weight, low price, easy processing and molding, and corrosion resistance. Adding appropriate silver micro-nano conductive materials to the polymer matrix can form a silver / polymer conductive nanocomposite, which can combine the ...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00B22F9/24B22F1/00
Inventor 张念椿胡建强
Owner SOUTH CHINA UNIV OF TECH
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