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Water-based nano-silver electrically-conductive printing ink capable of sintering at room temperature as well as preparation and application thereof

A technology of conductive ink and nano-silver, applied in the direction of ink, application, electrical components, etc.

Active Publication Date: 2018-06-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of the above-mentioned existing conductive inks, the present invention provides a water-based nano-silver conductive ink that can be sintered at room temperature and its preparation method, which overcomes the problems of high sintering process temperature and high content of volatile organic compounds in the existing conductive inks. The nano-silver conductive ink provided by the invention can be sintered at room temperature, which can omit the post-processing process and greatly reduce the cost

Method used

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  • Water-based nano-silver electrically-conductive printing ink capable of sintering at room temperature as well as preparation and application thereof
  • Water-based nano-silver electrically-conductive printing ink capable of sintering at room temperature as well as preparation and application thereof
  • Water-based nano-silver electrically-conductive printing ink capable of sintering at room temperature as well as preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Preparation of nano-silver particles dispersed with a short-chain molecular dispersant: configure a total of 70ml of ferrous sulfate solution with a concentration of 250g / L and a sodium citrate dihydrate solution with a concentration of 400g / L, and stir evenly to form a reducing solution; Concentration is 25ml of silver nitrate solution of 75g / L, and described reducing solution is added in the silver nitrate solution drop by drop at the rate of 10ml / min, while adding dropwise reducing solution, the reaction solution is mechanically stirred with the rotating speed of 150r / min , after the dropwise reaction was completed for 30 minutes, the obtained reaction system was centrifuged with a centrifuge, and then repeatedly centrifuged and washed 4 times with deionized water to obtain nano-silver particles dispersed with a short-chain molecular dispersant, such as figure 1 As shown, the particle size range of the nano-silver particles is 2-25nm, and the dispersion in deionized w...

Embodiment 2

[0044] Preparation of nano-silver particles dispersed with a short-chain molecular dispersant: configure a total of 70ml of a ferrous sulfate solution with a concentration of 250g / L and a sodium citrate dihydrate solution with a concentration of 400g / L, and stir evenly to form a reducing solution. Concentration is 25ml of silver nitrate solution of 75g / L, and described reducing solution is added in the silver nitrate solution drop by drop at the rate of 10ml / min, while adding dropwise reducing solution, the reaction solution is mechanically stirred with the rotating speed of 150r / min , after the dropwise addition finished reaction 30min, the obtained reaction system was centrifuged with a centrifuge, and then repeatedly centrifuged and washed 4 times with deionized water to obtain silver nanoparticles dispersed with a short-chain molecular dispersant. The particle size range of the silver nanoparticles is 2‐25nm, excellent dispersion in deionized water, all nanoparticles are ev...

Embodiment 3

[0049] Preparation of nano-silver particles dispersed with a short-chain molecular dispersant: configure a total of 70ml of a ferrous sulfate solution with a concentration of 250g / L and a sodium citrate dihydrate solution with a concentration of 400g / L, and stir evenly to form a reducing solution. Concentration is 25ml of silver nitrate solution of 75g / L, and described reducing solution is added in the silver nitrate solution drop by drop at the rate of 10ml / min, while adding dropwise reducing solution, the reaction solution is mechanically stirred with the rotating speed of 150r / min , after the dropwise addition finished reaction 30min, the obtained reaction system was centrifuged with a centrifuge, and then repeatedly centrifuged and washed 4 times with deionized water to obtain silver nanoparticles dispersed with a short-chain molecular dispersant. The particle size range of the silver nanoparticles is 2‐25nm, excellent dispersion in deionized water, all nanoparticles are ev...

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Abstract

The invention discloses water-based nano-silver electrically-conductive printing ink capable of sintering at a room temperature as well as preparation and application thereof. The preparation method comprises the following steps: mixing a reducing agent, a short-chain molecular dispersant and deionized water to obtain a reducing liquid; mixing silver salt and deionized water to form a reaction liquid; adding the reducing liquid into the reaction liquid dropwise and performing reaction after dropwise adding; centrifuging and cleaning to prepare nano-silver particles dispersed by the short-chainmolecular dispersant; mixing a functional aid and deionized water to prepare a composite aqueous solution of the functional aid; and mixing the nano-silver particles dispersed by the obtained short-chain molecular dispersant and the composite aqueous solution and performing ultrasonic dispersion in ice water bath. The electrically-conductive printing ink contains the electrically-conductive filler nano-silver particles, the deionized water and the composite aqueous solution of the functional aid, the viscosity is 8 to 15 cP, the surface tension is 25 to 35 mN / m, and the electrically-conductive printing ink can be sintered at a room temperature; and the electrically-conductive printing ink has low organic matter content and is environment-friendly.

Description

technical field [0001] The invention belongs to the fields of printed electronic materials, flexible electronic manufacturing and electronic packaging, and in particular relates to a water-based nano-silver conductive ink capable of sintering at room temperature and its preparation and application. Background technique [0002] Printed electronics technology is an electronic manufacturing technology based on printing principles. In the past few decades, photolithography technology has been widely used in the printed circuit board industry, but this technology is relatively complicated, including many steps such as exposure, development, etching, electroplating, etc. Photolithography technology is a subtractive material Manufacturing technology not only wastes a lot of raw materials, but also needs to use a lot of chemical reagents that are harmful to the environment. Therefore, a new field of electronics different from the traditional printed circuit board manufacturing tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/03C09D11/30H05K1/09
CPCC09D11/03C09D11/30C09D11/52H05K1/097
Inventor 张新平尹灿周敏波周舟陈其旺
Owner SOUTH CHINA UNIV OF TECH
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