Method for synthesizing copper nanoparticles

A technology of copper nanoparticles and synthesis methods, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as high cost, difficulty in large-scale industrial production, and high energy consumption, and achieve cost Low, widely used in industry, promoting reduction effect

Inactive Publication Date: 2012-04-11
EAST CHINA NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Conductive copper paste is widely used in the field of modern electronics industry. It is mainly prepared from micron-sized copper particles. With the development of printed electronics technology in recent years, especially the development of inkjet printing technology, the paste Higher requirements are put forward, and copper nanoparticles need to be used as ingredients; copper nanoparticles can be synthesized by physical or chemical methods. Physical methods such as plasma heating and evaporation methods have the disadvantages of high equipment investment costs, high energy consumption, and difficulty in large-scale production. Large-scale industrial production; chemical methods such as using ethylene glycol as a solvent and PVP as a stabilizer in NaHPO 2 Copper nanoparticles were synthesized under the reduction of (Nanotechnology 19 (2008) 415604); under microwave heating, ethylene glycol was used as solvent, and NaHPO 2 Reducing agent, preparation of copper nanoparticles (Journal of Colloid and Interface Science 277 (2004) 100–103); In the presence of polymer stabilizers, polyethylene glycol was used as solvent and reducing agent, and copper nanoparticles were prepared under microwave-assisted heating (Journal of Nanoparticle Research 13 (2011) 127-138); In the absence of a polymer stabilizer, polyethylene glycol was used as a solvent and a reducing agent, and under alkaline conditions, copper nanoparticles were synthesized under microwave-assisted heating ( Chem. Commun. 47 (2011), 7740); But these methods often must adopt a large amount of organic solvents as the solvent of reaction, and make the efficiency of synthesis lower, cost is high, be difficult to large-scale industrial production

Method used

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  • Method for synthesizing copper nanoparticles

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Effect test

Embodiment 1

[0013] 25 g CuSO 4 ·5H 2 O is placed in an 800 mL beaker, add 20 grams of water, and heat to make CuSO 4 ·5H 2 O dissolved, when CuSO 4 ·5H 2 After O is completely dissolved, add 33.3 g of PVP, stir well and add 13.2 g of NaHPO 2 ·xH 2 O, after stirring evenly, after standing at room temperature for a few minutes, a uniformly mixed blue semi-solid phase mixture is obtained, which is placed in a 700-watt microwave reaction oven, heated by microwave for 30 seconds, and the mixture quickly turns into a red copper color , after standing for 4 minutes, add 50 mL of ice water to quench the reaction, transfer the resulting mixture to a centrifuge tube, and centrifuge the copper nanoparticles, wash the obtained copper nanoparticles with 50 mL of water twice, 50 mL Washing with ethanol twice, and finally dispersing the obtained copper nanoparticles in ethylene glycol solvent, filled with nitrogen protection, to obtain a stable dispersion of copper nanoparticles.

Embodiment 2

[0015] 25 g CuSO 4 ·5H 2 O is placed in an 800 mL beaker, add 20 grams of water, and heat to make CuSO 4 ·5H 2 O dissolved, when CuSO 4 ·5H 2 After O is completely dissolved, add 6.2 grams of ethylene glycol and 33.3 grams of PVP successively, stir well and add 8.48 grams of NaHPO 2 ·xH 2 O, after stirring evenly, after standing at room temperature for several minutes, a uniformly mixed blue semi-solid phase mixture was obtained, which was placed in a 700-watt microwave oven, heated by microwave for 10 minutes, and the mixture quickly turned red copper, and placed for 1 Minutes later, add 50 mL of ice water to quench the reaction, transfer the resulting mixture to a centrifuge tube, and centrifuge the copper nanoparticles. The obtained copper nanoparticles are washed twice with 50 mL of water and twice with 50 mL of ethanol. , and finally the obtained copper nanoparticles are dispersed in ethylene glycol solvent, filled with nitrogen protection, and a stable copper nanop...

Embodiment 3

[0017] 25 g CuSO 4 ·5H 2 O was placed in an 800 mL beaker, 5 mL of water and 20 g of 1,2-diethanol were added in sequence, and the CuSO 4 ·5H 2 O dissolved, when CuSO 4 ·5H 2 After O is completely dissolved, add 6.2 grams of ethylene glycol and 33.3 grams of PVP successively, stir well and add 8.48 grams of NaHPO 2 ·xH 2 O, after stirring evenly, after standing at room temperature for several minutes, a uniformly mixed blue semi-solid phase mixture was obtained, which was placed in a 700-watt microwave oven, heated by microwave for 2 minutes, and the mixture quickly turned red copper, and placed for 8 Minutes later, add 50 mL of ice water to quench the reaction, transfer the resulting mixture to a centrifuge tube, and centrifuge the copper nanoparticles. The obtained copper nanoparticles are washed twice with 50 mL of water and twice with 50 mL of ethanol. , and finally the obtained copper nanoparticles are dispersed in ethylene glycol solvent, filled with nitrogen prote...

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PUM

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Abstract

The invention discloses a method for synthesizing copper nanoparticles, which comprises the following steps of: using a half solid phase synthesis method to mix a cupric salt, a reducing agent, a stabilizing agent and water to obtain a uniform mixture; and using a microwave heating method to quickly synthesize the copper nanoparticles. The water or other polar organic molecules can quickly absorbmicrowaves to quickly increase the temperature of a reaction system so as to promote reduction of copper ions, and due to half solid phase and large viscosity and poor flowability of the reaction system, the high molecular polymer stabilizing agent can effectively contact and cover the copper nanoparticles to control growth of the nanoparticles so as to obtain smaller copper nanoparticles. The method has the characteristics of low cost, quickness, simpleness, convenience, no large amounts of solvents, and the like, and is suitable for large scale industrial production; and the prepared coppernanoparticles are 1-100nm in particle size and can be used for preparing a conductive paste along with wide industrial application.

Description

technical field [0001] The invention relates to the field of synthesis of nanomaterials, in particular to a synthesis method of copper nanoparticles. Background technique [0002] Conductive copper paste is widely used in the field of modern electronics industry. It is mainly prepared from micron-sized copper particles. With the development of printed electronics technology in recent years, especially the development of inkjet printing technology, the paste Higher requirements are put forward, and copper nanoparticles need to be used as ingredients; copper nanoparticles can be synthesized by physical or chemical methods. Physical methods such as plasma heating and evaporation methods have the disadvantages of high equipment investment costs, high energy consumption, and difficulty in large-scale production. Large-scale industrial production; chemical methods such as using ethylene glycol as a solvent and PVP as a stabilizer in NaHPO 2 Copper nanoparticles were synthesized ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00B82Y30/00
Inventor 林和春褚君浩
Owner EAST CHINA NORMAL UNIV
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