Method for preparing nano-copper

A technology of nano-copper and copper salt, which is applied in the field of preparation of copper powder with a particle size of less than 50 nm, can solve the problems of difficulty in large-scale production, high cost and toxicity of nano-copper, and achieves wide industrial use, high yield and simple process. Effect

Inactive Publication Date: 2013-04-24
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of high cost, toxicity and difficulty in large-scale production when preparing nano-copper by chemical method, and provides a simple, high-yield, low-cost, environmentally friendly and stable nano-copper preparation method that is easy for large-scale production

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  • Method for preparing nano-copper
  • Method for preparing nano-copper
  • Method for preparing nano-copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The precursor is copper salt to prepare nano-copper, proceed as follows:

[0022] (1) 0.01mol of copper nitrate (commercially available, analytically pure, molecular formula Cu(NO 3 ) 2 ·3H 2 0), grind to below 100 mesh, add in 150ml liquid paraffin while stirring, add 20ml span-80, stir 1h;

[0023] (2) After the copper nitrate is uniformly dispersed in the mixed solution and becomes a blue-green transparent emulsion, pour it into a 500ml three-necked flask, and pass N 2 , continue to stir, slowly raise the temperature to 300°C, and keep for 3h;

[0024] (3) centrifuging the product obtained in (2), discarding the upper layer oil, leaving the precipitate;

[0025] (4) Wash the precipitate obtained in (3) 4 times with petroleum ether, and centrifuge to leave the precipitate;

[0026] (5) The precipitate obtained in (4) was washed alternately with distilled water and absolute ethanol three times each, and centrifuged;

[0027] (6) naturally drying the precipitate o...

Embodiment 2

[0029] The preparation of nanometer copper is carried out according to the following steps:

[0030] (1) 0.01mol of copper hydroxide (commercially available, analytically pure, molecular formula Cu(OH) 2 ), grind to below 100 mesh, add 150ml liquid paraffin while stirring, add 20ml span-80, stir for 1h;

[0031] (2) After the copper nitrate is uniformly dispersed in the mixed solution and becomes a blue-green transparent emulsion, pour it into a 500ml three-necked flask, and pass N 2 , continue to stir, slowly raise the temperature to 300°C, and keep for 3h;

[0032] (3) centrifuging the product obtained in (2), discarding the upper layer oil, leaving the precipitate;

[0033] (4) Wash the precipitate obtained in (3) 4 times with petroleum ether, and centrifuge to leave the precipitate;

[0034] (5) The precipitate obtained in (4) was washed alternately with distilled water and absolute ethanol three times each, and centrifuged;

[0035] (6) naturally drying the precipitat...

Embodiment 3

[0037] The precursor is copper salt solution to prepare nano-copper, proceed as follows:

[0038] (1) 0.01mol of copper nitrate (commercially available, analytically pure, molecular formula Cu(NO 3 ) 2 ·3H 2 O), dissolved in 20ml of dehydrated ethanol containing 1.0g of PVA, added Tween 85 while stirring, added in 150ml of liquid paraffin, added 20mlspan-80, stirred for 1h;

[0039] (2) After the copper nitrate is uniformly dispersed in the mixed solution and becomes a blue-green transparent emulsion, pour it into a 500ml three-necked flask, and pass N 2 , continue to stir, slowly raise the temperature to 300°C, and keep for 3h;

[0040] (3) centrifuging the product obtained in (2), discarding the upper layer oil, leaving the precipitate;

[0041] (4) Wash the precipitate obtained in (3) 4 times with petroleum ether, and centrifuge to leave the precipitate;

[0042] (5) The precipitate obtained in (4) was washed alternately with distilled water and absolute ethanol three ...

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Abstract

The invention relates to a method for preparing nano-copper. The method comprises the following steps of: dispersing a copper precursor into the liquid paraffin serving as a solvent and a reducing agent; adding a surfactant into the liquid paraffin with stirring; performing heat treatment for 2 to 4 hours in an atmosphere of N2 protective gas or no protective gas; standing; centrifuging to obtaina product; and alternately washing the product by using petroleum ether, distilled water or absolute ethyl alcohol to obtain the nano-copper. The nano-copper powder prepared by using the method has the advantages of particle sizes of less than 50 nm, uniform distribution, difficult oxidation, high dispersibility in polar solvents or non-polar solvents, cheap raw materials, low energy consumption,simple process equipment and easy large-scale production.

Description

technical field [0001] The invention relates to a method for preparing nanometer copper, in particular to a method for preparing copper powder with a particle size of less than 50nm. Background technique [0002] Nanotechnology copper and its composites have the characteristics of small size, large specific surface area, quantum size effect and macroscopic quantum tunneling effect, so that they can not only be directly used as catalysts in the chemical industry, but also can be used to manufacture conductive pastes (conductive adhesives, Magnetic adhesive), "superplastic" steel, gas sensor, advanced lubricating oil additive, but also an indispensable basic raw material for high-conductivity, high-strength nano-copper. Therefore, in recent years, the research on the preparation, performance and application of copper nanomaterials has attracted much attention at home and abroad. The commonly used preparation methods of nano copper include electric radiation method, gas phase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 黄伟温月丽王斌高志华
Owner TAIYUAN UNIV OF TECH
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