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A kind of preparation method of the small size nano-silver used in water-based conductive ink

A conductive ink, small size technology, applied in the field of small size nano silver preparation, can solve the problems of safety hazards, environmental pollution, etc., achieve the effect of inhibiting agglomeration, process environment friendly, and less content

Active Publication Date: 2021-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prior art CN102504646A discloses a stable nano-silver ink-jet conductive ink and a preparation method thereof. The method uses alkyl mercaptans which have a strong effect on nano-silver and alkylamines which have a weak effect together as protective agents to prepare particles Nano-silver particles with a diameter less than 10nm can obtain solvent-based inks with low post-treatment temperature and good stability; but this technology uses toluene, phenylhydrazine toluene, methanol, cyclohexane, alkane as a solvent, there are huge safety hazards and environmental pollution problems

Method used

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  • A kind of preparation method of the small size nano-silver used in water-based conductive ink
  • A kind of preparation method of the small size nano-silver used in water-based conductive ink
  • A kind of preparation method of the small size nano-silver used in water-based conductive ink

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preparation example Construction

[0024] A kind of preparation method of the small size nano silver that is used for water-based conductive ink, comprises the following steps:

[0025] Step 1, adding nucleation promoting stabilizer A, water-soluble organic protective agent B and reducing agent into deionized water in sequence, stirring and mixing uniformly to obtain mixed solution A; wherein, the nucleation promoting stabilizer A in mixed solution A The concentration is 0.1-0.6mol / L, the concentration of the water-soluble organic protective agent B is 0.5-1.0mol / L, the concentration of the reducing agent is 5-10mol / L, and the stirring speed is 400-800rpm;

[0026] Step 2, preparing a water-soluble silver salt solution with a concentration of 5-12 mol / L, and adding it into the mixed solution A obtained in step 1 at a rate of 15-25 drops / min, stirring and mixing evenly to obtain a mixed solution B; wherein, mixing The molar ratio of the silver salt in the liquid B to the reducing agent in step 1 is 1: (3~7);

...

Embodiment 1

[0034]Add 4.3g of trisodium citrate, 3g of polyacrylic acid, and 25g of ethanolamine into 50mL of deionized water in sequence, and magnetically stir at a speed of 600rpm at room temperature for 30min to obtain a mixed solution A; Add 10 mL of 10 mol / L silver nitrate solution dropwise, stir magnetically for 10 minutes to obtain mixed solution B; react the obtained mixed solution B in a water bath at 30°C for 30 minutes, then raise the temperature to 45°C at a rate of 1.0°C / min, and react in a water bath for 10 minutes , then raised the temperature to 65°C at a heating rate of 1.0°C / min, reacted in a water bath for 30 minutes, and obtained a gray-green solution; added 250ml of absolute ethanol to the reacted solution system, kept magnetic stirring during the addition process, and then stood still, The nano-metallic silver particles in the solution all settle after standing, and the precipitated solids are collected; the collected precipitated solids are washed in a mixed solution...

Embodiment 2

[0040] Add 3.2g of chitosan, 5.8g of polyglutamic acid, and 30g of diethanolamine into 50mL of deionized water in turn, and magnetically stir at a speed of 600rpm at room temperature for 25min to obtain mixed solution A; Add 10mL of 8mol / L silver nitrate solution dropwise to solution A, and stir magnetically for 10min to obtain mixed solution B; the obtained mixed solution B was reacted in a water bath at 30°C for 20min, and then heated to 40°C at a heating rate of 1.0°C / min , react in a water bath for 10 minutes, then raise the temperature to 70°C at a heating rate of 1.0°C / min, and react in a water bath for 40 minutes to obtain a gray-green solution; add 400ml of absolute ethanol to the reacted solution system, and maintain magnetic stirring during the addition process. Then stand still, the nano-metallic silver particles in the solution all settle after standing, and collect the precipitated solid; the precipitated solid collected is washed in a mixed solution of deionized w...

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Abstract

The invention provides a preparation method of small-sized nanosilver for water-based conductive printing ink, and relates to the technical field of preparation of nanosilver. According to the preparation method provided by the invention, one of trisodium citrate, tripotassium citrate, carboxymethyl cellulose, sodium dodecyl sulfate and chitosan is added as a nucleation promoting stabilizer A, andone of polyglutamic acid, polyacrylic acid, polymethylacrylic acid, polyoxypropylene and polyacrylamide is added as a water-soluble organic protective agent B, so that caking of the nanosilver can beeffectively inhibited; nanosilver particles prepared through the preparation method are small in size and uniform in distribution, and the caking cannot be caused after long-term storage; the contentof an organic cladding agent on the surfaces of the nanosilver particles is less, and high conductivity can be realized; during preparation of the water-based conductive printing ink, the nanosilvercan be quickly and fully dispersed in a waterborne solvent, has excellent dispersity and can be applied to the technical field of ink jet printing.

Description

technical field [0001] The invention belongs to the technical field of nano-metal material preparation, and in particular relates to a preparation method of small-sized nano-silver used in water-based conductive ink. Background technique [0002] In recent years, the increasing complexity of silicon-based integrated circuit manufacturing technology and the huge investment required have prompted the exploration and research of using traditional printing technology to manufacture various electronic devices and systems. As the basis and key of electronic devices manufactured by printing technology, conductive ink has attracted much attention in its research and preparation. Conductive inks are mainly divided into gold-based conductive inks, silver-based conductive inks, copper-based conductive inks and carbon-based conductive inks in terms of material types. Silver is cheaper than gold, and has better conductivity than copper and carbon. Based on the consideration of the condu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00C09D11/52
CPCB22F9/24B82Y40/00C09D11/52
Inventor 陈金菊刘书丽冯哲圣吴海斌王焱王小明
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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