Method for synthesizing copper nanoparticles

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 ...

AI Technical Summary

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

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