Method for producing silver nano-particles and silver nano-particles

一种银纳米粒子、碳原子的技术，应用在用于材料和表面科学的纳米技术、纳米技术、纳米技术等方向，能够解决水的使用困难等问题，达到低电阻值、优异稳定性、简单生产方法的效果

Active Publication Date: 2015-04-22
DAICEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of water causes difficulties in completely removing the water after the silver particles are formed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0156] (Preparation of silver nanoparticles)

[0157] In a 100-mL flask, 3.0 g (9.9 mmol) of silver oxalate was placed, then, 4.5 g of 1-butanol was added, and the resulting mixture was stirred at room temperature to prepare a silver oxalate slurry in 1-butanol.

[0158] At 30°C, 8.67g (118.5mmol) n-butylamine, 6.00g (59.3mmol) n-hexylamine, 5.74g (44.4mmol) n-octylamine, 2.75g (14.8mmol) dodecylamine, The amine mixture with 6.05 g (59.3 mmol) of N,N-dimethyl-1,3-propanediamine was added dropwise to the slurry of silver oxalate in 1-butanol. After completion of the dropwise addition, the resulting mixture was stirred at 30° C. for 2 hours to perform a complex-forming reaction of silver oxalate and amine, thereby forming a white substance (silver oxalate-amine complex).

[0159] After the silver oxalate-amine complex was formed, the reaction mixture was heated with stirring, as a result, a reflux state was reached at 100°C, and the temperature of the reaction mixture did not r...

Embodiment 2

[0175] In the preparation of silver nanoparticles, a slurry of silver oxalate in 1-hexanol was prepared in the same manner as in Example 1, except that 4.5 g of 1-hexanol was used instead of 1-butanol for 3.0 g ( 9.9 mmol) silver oxalate. Then, in the same manner as in Example 1, the amine mixture liquid was added dropwise to the resulting silver oxalate slurry in 1-hexanol to form a white substance (silver oxalate-amine complex).

[0176] After the silver oxalate-amine complex was formed, the reaction mixture was heated with stirring, as a result, a reflux state was reached at 102°C, and the temperature of the reaction mixture did not rise any more. Thermal decomposition of the silver oxalate-amine complex at this reflux temperature of 102 °C resulted in a suspension in which dark blue silver nanoparticles were suspended in the amine mixture liquid. Stirring can be carried out very successfully in the complex forming reaction step and the thermal decomposition step.

[0177...

Embodiment 3

[0179] In the preparation of silver nanoparticles, a slurry of silver oxalate in tert-butanol was prepared in the same manner as in Example 1, except that 4.5 g of tert-butanol was used instead of 1-butanol for 3.0 g (9.9 mmol) silver oxalate. Then, in the same manner as in Example 1, the amine mixture liquid was added dropwise to the obtained slurry of silver oxalate in tert-butanol to form a white substance (silver oxalate-amine complex).

[0180] After the formation of the silver oxalate-amine complex, the reaction mixture was heated with stirring, as a result, a reflux state was reached at 96°C, and the temperature of the reaction mixture did not rise any more. Thermal decomposition of the silver oxalate-amine complex at this reflux temperature of 96 °C resulted in a suspension in which dark blue silver nanoparticles were suspended in the amine mixture liquid. Stirring can be carried out very successfully in the complex forming reaction step and the thermal decomposition ...

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Abstract

The present invention provides a silver nano-particle production method which is safe and simple also in terms of scaled-up industrial-level production, in a so-called thermal decomposition method in which a silver-amine complex compound is thermally decomposed to form silver nano-particles. A method for producing silver nano-particles comprising: mixing an aliphatic hydrocarbon amine and a silver compound in the presence of an alcohol solvent having 3 or more carbon atoms to form a complex compound comprising the silver compound and the amine; and thermally decomposing the complex compound by heating to form silver nano-particles.

Description

technical field [0001] The present invention relates to methods of producing silver nanoparticles and silver nanoparticles. The present invention is also applicable to methods and metal nanoparticles for producing metal nanoparticles containing non-silver metals. Background technique [0002] Silver nanoparticles can be sintered even at low temperatures. By taking advantage of this property, silver coating compositions containing silver nanoparticles are used to form electrodes or conductive circuit patterns on substrates in the production of various electronic devices. Silver nanoparticles are usually dispersed in organic solvents. Silver nanoparticles have an average primary particle diameter of about several nanometers to about tens of nanometers, and their surfaces are usually coated with an organic stabilizer (protective agent). When the substrate is a plastic film or sheet, silver nanoparticles need to be sintered at a low temperature (for example, at 200° C. or low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30B22F1/00B22F1/02B82Y30/00B82Y40/00H01B5/00H01B13/00B22F1/054
CPCB22F9/30B82Y40/00B82Y30/00B22F1/0018C22C5/06H01B1/02B22F1/054C22B11/04H01B5/00H01B13/00B22F2301/255B22F2304/054
Inventor 井口由纪冈本和树
Owner DAICEL CORP
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