Method for producing silver nanowires

A silver nanowire, manufacturing method technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of increased manufacturing cost, large solution processing capacity, etc. The effect of reducing the total

Inactive Publication Date: 2019-06-14
DOWA ELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing volume of the added solution is large, resulting in an increase in manufacturing cost

Method used

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  • Method for producing silver nanowires
  • Method for producing silver nanowires
  • Method for producing silver nanowires

Examples

Experimental program
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Effect test

preparation example Construction

[0070] [Preparation of silver-containing solution]

[0071] The higher the silver concentration of solution B (silver-containing solution) added to solution A, the more the total amount of solution B can be reduced. As a result of various investigations, by setting the silver concentration to 3.5 mol / L or more, the total amount of the silver-containing solution can be significantly reduced compared to conventional methods. It is more effective to set the silver concentration to 3.9 mol / L or more. When further reducing the total amount of the silver-containing solution significantly, the silver concentration is preferably 5.0 mol / L or more, more effectively 10.0 mol / L or more.

[0072] According to the research of the inventors, in a solvent using only alcohol, the temperature of the solution containing silver nitrate is raised to about 40° C. and stirred for about 1 hour, thereby obtaining a solution with a silver concentration of 3.5 to 4.5 mol / L. silver solution. In this ...

Embodiment 1

[0092] Except having prepared the solution B as follows, the same experiment as the comparative example 1 was done.

[0093] [Solution B]

[0094] 4.25 g of silver nitrates were added to an alcohol solvent of 6.50 g of propylene glycol, stirred and dissolved at 40° C., and a silver-containing solution (solution B) was obtained. About the obtained solution B, the color of a solution was checked visually. Table 1 shows the concentration of silver nitrate in the solution, the composition of propylene glycol and water, the dissolution conditions (stirring time, temperature), and the color of the solution.

[0095] Table 1 shows the average length, average diameter, and average aspect ratio of the synthesized silver nanowires investigated by the same method as in Comparative Example 1.

Embodiment 2

[0097] Except having prepared the solution B as follows, the same experiment as the comparative example 1 was done.

[0098] [Solution B]

[0099] 4.25 g of silver nitrates were added to a mixed solvent of 6.37 g of propylene glycol and 0.13 g of pure water, stirred and dissolved at 35° C., and a silver-containing solution (solution B) was obtained. About the obtained solution B, the color of a solution was checked visually. Table 1 shows the concentration of silver nitrate in the solution, the composition of propylene glycol and water, the dissolution conditions (stirring time, temperature), and the color of the solution.

[0100] Table 1 shows the average length, average diameter, and average aspect ratio of the synthesized silver nanowires investigated by the same method as in Comparative Example 1.

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Abstract

To reduce the required amount of a silver-containing solution and improve the yield of long silver nanowires in the production of silver nanowires. The present invention provides a method for producing silver nanowires, the method comprising: adding a silver-containing solution to an alcohol solvent in which a chloride, a bromide, an aluminum salt, an alkali metal hydroxide, and an organic protective agent are dissolved; and reducing and precipitating silver into a wire form in the alcohol solvent, wherein a solution in which a silver compound is dissolved at a silver concentration of 3.5-32.0mol / L is used as the added silver-containing solution. As the silver-containing solution, it is more preferable to use a water-containing solvent having 4.0-100.0% of water in mass%.

Description

technical field [0001] The present invention relates to a method for producing silver nanowires useful as a material for forming a transparent conductor and the like. Background technique [0002] In this specification, a fine metal wire having a thickness of about 200 nm or less is referred to as a "nanowire (s)". Among them, silver nanowires are considered promising as a conductive material for imparting conductivity to transparent substrates. When removing liquid components after coating a solution containing silver nanowires (silver nanowire ink) on transparent substrates such as glass, PET (polyethylene terephthalate), PC (polycarbonate), silver nanowires The wires contact each other on the substrate to form a conductive network, and a transparent conductor can be obtained. [0003] As a method for producing silver nanowires, there is known a method of dissolving PVP (polyvinylpyrrolidone) as an organic protective agent and a halogen compound in an alcohol solvent suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/18
CPCB22F9/24B82Y40/00C22C1/0466C22C5/06B22F2999/00B22F1/0547B22F1/07B22F1/18B82Y30/00B22F2304/054B22F2301/255
Inventor 佐藤王高藤田英史
Owner DOWA ELECTRONICS MATERIALS CO LTD
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