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Preparation method of nano copper paste for conductive ink

A technology of conductive ink and nano-copper, which is applied in the direction of conductive coatings, etc., and can solve the problem of easy oxidation of copper

Active Publication Date: 2015-11-04
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, copper is easy to oxidize, how to use a simple process to prepare nano-copper paste for conductive ink, and solve the problem of anti-oxidation of nano-copper is very meaningful

Method used

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  • Preparation method of nano copper paste for conductive ink
  • Preparation method of nano copper paste for conductive ink
  • Preparation method of nano copper paste for conductive ink

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preparation example Construction

[0029] see figure 1 , the preparation method of nano-copper paste for conductive ink according to one embodiment, comprising the following steps S110 to S150.

[0030] Step S110: adding the copper source into the solvent and stirring evenly at room temperature to obtain a copper source dispersion.

[0031] The copper source is preferably copper hydroxide (Cu(OH) 2 ), copper chloride (CuCl 2 2H 2 O), copper sulfate (CuSO 4 ·5H 2 O), copper citrate (C 6 h 6 CuO 7 ), copper acetate (Cu(CH 3 COO) 2 ·H 2 O), basic copper carbonate (Cu 2 (OH) 2 CO 3 ) or copper acetylacetonate (Cu(C 5 h 7 o 2 ) 2 ).

[0032] The solvent is at least one selected from deionized water, diethylene glycol, ethanol, ethylene glycol and glycerin.

[0033] Preferably, the copper source is added into the solvent and stirred at room temperature for 10 minutes to 30 minutes to ensure that the copper source is uniformly dispersed in the solvent.

[0034] Preferably, the concentration of copp...

Embodiment 1

[0063] 1. Add 0.001mol copper hydroxide to 50mL deionized water, stir at room temperature for 20min, and stir evenly to obtain copper source dispersion;

[0064] 2. Add 1mL PAA-800 to the copper source dispersion, stir at room temperature for 10min until uniform, and obtain the first mixed solution;

[0065] 3. Add 1 mL of triethylamine to the first mixed solution and stir at room temperature for 10 minutes until uniform to obtain the second mixed solution;

[0066] 4. Add 1 mL of hydrazine hydrate to the second mixed solution for reduction, and react at room temperature for 30 minutes, then stop the reaction to obtain nano-copper colloids;

[0067] 5. Concentrate the nano-copper colloid by rotary evaporation at 60° C. to obtain a nano-copper paste for conductive ink, and the time for evaporation and concentration is 10 minutes.

[0068] figure 2 It is the TEM picture of the nano-copper colloid prepared in Example 1. Depend on figure 2 It can be seen that the particle si...

Embodiment 2

[0071] 1. Add 0.01mol copper citrate to 200mL ethanol, stir at room temperature for 30min, and stir evenly to obtain copper source dispersion;

[0072] 2. Add 1mL PAA-1500 to the copper source dispersion, stir at room temperature for 50min until uniform, and obtain the first mixed solution;

[0073] 3. Add 10 mL of ethanolamine to the first mixed solution, stir at room temperature for 60 minutes until uniform, and obtain the second mixed solution;

[0074] 4. Add 0.004mol sodium borohydride to the second mixed solution for reduction, and after reacting at room temperature for 3 hours, stop the reaction to obtain nano-copper colloid;

[0075] 5. Concentrate the nano-copper colloid by rotary evaporation at 80° C. to obtain a nano-copper paste for conductive ink, and the time for evaporation and concentration is 25 minutes.

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Abstract

The invention relates to a preparation method of nano copper paste for conductive ink. The preparation method of the nano copper paste for conductive ink includes adding copper source into solution, mixing evenly at room temperature, and obtaining copper source dispersing liquid; adding dispersant into the copper source dispersing liquid, mixing evenly at room temperature, and obtaining first mixture; adding complexing agent into the first mixture, mixing evenly at room temperature, and obtaining a second mixture; adding a reducing agent to the second mixture, reacting for 30 minutes to 3 hours at room temperature, and obtaining nano copper colloid; concentrating the nano copper colloid, and obtaining the nano copper paste used for conductive ink. The preparation method is simple, and nano copper is difficult to oxidize and has fine dispersing performance.

Description

technical field [0001] The invention relates to the technical field of nano functional materials, in particular to a preparation method of nano copper paste used in conductive ink. Background technique [0002] The development of printed electronics has made conductive inks more and more people's attention. Nano-metal-based conductive inks have become very important materials in the field of electronic packaging manufacturing due to their low sintering temperature, fine-scale processing capabilities, and suitable for flexible printing. As a functional material, the excellent conductivity of nano-metal-based conductive ink has quickly attracted the attention of many well-known companies in Europe, America, Japan, South Korea and other countries. They have invested in the establishment of research and development centers, focusing on the development of low-temperature curing conductive inks represented by nano-silver and nano-copper. . [0003] The research on conductive ink ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24C09D5/24
Inventor 孙蓉朱朋莉陈良张昱李刚
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI