Nano silver-coated copper powder and preparation method and application thereof

A technology of nano-silver and copper-coated powder, applied in the field of nanomaterials, can solve the problems of few research reports on silver-coated copper nanoparticles, increased resistivity of conductive patterns, complicated preparation process, etc., and achieves good conductivity and controllable particle size. , the effect of good application prospects

Inactive Publication Date: 2016-08-17
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent application CN201110308119.1 prepare silver acetate and organic protective agent into toluene solution, add phenylhydrazine toluene solution to obtain nano-silver particles with a particle size of less than 10nm that meet the requirements of inkjet printing; patent application CN201110261814.7 combine silver nitrate and organic protective agent Soluble in isopropanol and add sodium borohydride in isopropanol solution to obtain nano silver particles with a particle size of less than 50nm that meet the requirements of inkjet printing, but th

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  • Nano silver-coated copper powder and preparation method and application thereof

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Effect test

Embodiment 1

[0031] The preparation method of nanometer silver-coated copper powder is:

[0032] Prepare 15 mL of copper sulfate solution with a concentration of 0.5 mol / L, add 0.0075 mol complexing agent sodium citrate, stir and dissolve to obtain a copper citrate solution, pour the copper citrate solution into a constant pressure dropping funnel for use; Add 0.015mol sodium borohydride, 0.0030mol cetyltrimethylammonium bromide and 0.0045mol polyvinylpyrrolidone to 100mL of 0.25mol / L sodium hydroxide solution, heat up to 50°C and stir to dissolve to obtain a reducing solution; Add the original solution into the reaction device, ventilate the air with nitrogen for 20 minutes, add the copper citrate solution dropwise, and stir and react at 50°C for 30 minutes under the condition of nitrogen to obtain nano-copper sol;

[0033] Add 20 mL of sulfuric acid solution with a concentration of 1.5 mol / L to the nano-copper sol, and after reacting for 5 minutes, adjust the pH to 6 with a sodium hydrox...

Embodiment 2

[0036] The preparation method of nanometer silver-coated copper powder is:

[0037] Prepare 20 mL of copper sulfate solution with a concentration of 0.5 mol / L, add 0.015 mol complexing agent sodium citrate, stir and dissolve to obtain a copper citrate solution, pour the copper citrate solution into a constant pressure dropping funnel for use; Add 0.03mol sodium borohydride, 0.01mol cetyltrimethylammonium bromide and 0.015mol polyvinylpyrrolidone to 150mL of 0.25mol / L sodium hydroxide solution, heat up to 30°C and stir to dissolve to obtain a reducing solution; Add the original solution into the reaction device, ventilate the air with nitrogen for 40 minutes, add copper citrate solution dropwise, and stir and react at 30°C for 60 minutes under the condition of nitrogen, to obtain nano-copper sol;

[0038] Add 20 mL of sulfuric acid solution with a concentration of 1.5 mol / L to the nano-copper sol, and after reacting for 8 minutes, adjust the pH to 6.5 with a sodium hydroxide so...

Embodiment 3

[0041] The preparation method of nanometer silver-coated copper powder is:

[0042]Prepare 30 mL of copper sulfate solution with a concentration of 0.8 mol / L, add 0.048 mol complexing agent sodium citrate, stir and dissolve to obtain a copper citrate solution, pour the copper citrate solution into a constant pressure dropping funnel for use; Add 0.096mol sodium borohydride and 0.036mol polyvinylpyrrolidone to 120mL of 0.5mol / L sodium hydroxide solution, heat up to 40°C and stir to dissolve to obtain a reducing solution; add the reducing solution to the reaction device, blow nitrogen for 30min to discharge the air, drop Add copper citrate solution, stir and react for 50 minutes at 40°C under nitrogen atmosphere, to obtain nano-copper sol;

[0043] Add 15 mL of sulfuric acid solution with a concentration of 2 mol / L to the nano copper sol, and after reacting for 8 minutes, adjust the pH to 6 with a sodium hydroxide solution with a concentration of 1.8 mol / L to obtain a nano coppe...

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Abstract

The invention discloses nano silver-coated copper powder and a preparation method and application thereof. A copper sulfate solution or a copper nitrate solution is mixed with a complexing agent to prepare a complexing copper solution, an alkaline solution is mixed with sodium borohydride and a dispersing agent to obtain a reducing solution, nitrogen is introduced to the reducing agent to remove air, and then the complexing copper solution is added to obtain nano-copper sol; a sulfuric acid solution is added to the nano-copper sol to react with excess sodium borohydride, then the pH is adjusted to 6-7.5 with the alkaline solution so as to obtain a nano-copper sol dispersing solution, then a silver nitrate solution is added to react to obtain a nano-silver coated copper dispersing solution, and after separation, the nano silver-coated copper powder is obtained. The nano silver-coated copper powder prepared according to the invention is core-shell structure nano particles with particle size conforming to ink-jet printing requirement, is low in cost and simple and easy in preparation method, can be used as a conducting material of conducting ink for ink jet printing, and has the advantages of being good in conducting performance and low in cost.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to nanometer silver-coated copper powder, its preparation method and application. technical background [0002] In recent years, printed electronics have been widely used in radio frequency identification (RFID) tags, solar thin-film batteries, transistors, sensors, flexible electronic devices and other fields, and new precision manufacturing technologies such as inkjet printing for precision processing of electronic conductive patterns are becoming more and more more important. [0003] High-performance printed conductive inks used in inkjet printing have high requirements on the particle size and conductivity of conductive fillers. At present, metal conductive materials such as silver nanoparticles are mainly used to obtain printed conductive inks, and inkjet printing direct imaging technology using this ink has been widely used. Patent application CN201110308119.1 pre...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F9/24C09D11/52C09D11/38B82Y30/00B82Y40/00
CPCC09D11/38C09D11/52B82Y30/00B82Y40/00B22F9/24B22F1/17B22F1/054
Inventor 易国斌谭胜友俎喜红罗洪盛宋旭亮
Owner GUANGDONG UNIV OF TECH
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