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Preparation method of nano-copper

A technology of nano-copper and copper salt, which is applied in the field of nano-materials, can solve the problems of low product purity, and achieve the effects of simple process, mild reaction conditions and good product performance

Inactive Publication Date: 2009-12-23
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method adds sulfur-containing compounds, and operations such as extraction with chloroform introduce a large amount of impurities, resulting in low purity of the final product

Method used

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  • Preparation method of nano-copper
  • Preparation method of nano-copper

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Example 1: Dissolve 0.01mol of copper acetate in 100ml of ethanol, add 5ml of oleic acid and 0.5g of polyethylene glycol 2000, stir to dissolve, and heat up to 50°C. Slowly add 10ml of hydrazine hydrate solution, stir vigorously, the solution gradually turns deep red, indicating the generation of nano-copper, and stop heating after 20 minutes. The cooled solution is left to stand and then centrifuged, and washed with ethanol and acetone repeatedly for more than three times to obtain pure nano-copper.

Embodiment 2

[0022] Example 2: Dissolve 0.01mol of copper sulfate pentahydrate in 100ml of diethylene glycol, add 0.5g of cetyltrimethylammonium bromide and 0.8g of polyvinyl alcohol 300,000, and raise the temperature to 100°C. Dissolve 0.02mol of sodium hypophosphite in 50ml of diethylene glycol, slowly add to the above solution and stir vigorously, the solution turns purple, indicating that nano-copper is formed, and stop heating after 20 minutes. Subsequent operations are the same as in Example 1.

Embodiment 3

[0023] Example 3: Dissolve 0.01 mol of copper nitrate in 100 ml of ethylene glycol, add 0.6 g of dodecyltrimethylammonium chloride and 2 g of polyvinylpyrrolidone (K30), and heat up to 40 degrees. Dissolve 0.01mol sodium borohydride in 50ml ethylene glycol, slowly add to the above solution and stir vigorously, the solution turns yellowish brown, indicating the production of nano-copper, and the reaction stops after 20 minutes. Subsequent operations are the same as in Example 1.

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Abstract

The invention belongs to the nanometer material technical field, in particular to a preparation method of nano-copper, comprising the following steps: dissolving copper salt and organic protective agents in a solvent, heating the solution to 30-100 DEG C, simultaneously adding reducing agent in the reaction system to react while stirring for 20-30min, then cooling gradually; standing the cooled solution, and then centrifuging and finally washing the solution with ethanol and acetone repeatedly to obtain pure nano-copper. The invention has simple process, mild reaction conditions and short reaction time; in the reaction process, two protective agents are both adopted to prevent the growth and oxidation of nano-copper; the product performance is good, the particle size of nano-copper is less than 20nm, the nano-copper can not be oxidized for one month in the air; the production cost is low and no hazardous waste can be generated, thus meeting the demand of 'green production'.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a method for preparing nanometer copper, in particular to a method for preparing nanometer copper with good dispersibility and strong oxidation resistance. Background technique [0002] Since the 1980s, a nanotechnology that has attracted worldwide attention has developed rapidly. Nanotechnology will cause revolutionary changes in many industrial fields in the 21st century. Nanotechnology shows wide application potential in materials, information, energy, environment, life, military, manufacturing, etc. It is the source of high-tech development in the 21st century and will bring huge changes to human life. Key strategic areas of technology and the commanding heights of the global economy. Products made of nanomaterials have many peculiar properties. Nanomaterials are also called ultrafine particle materials, which are composed of nanoparticles. Due to the large pro...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 杨振国唐晓峰
Owner FUDAN UNIV
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