Method for preparing copper nanometer granules

A technology of copper nanoparticles and copper nitrate, applied in nanotechnology and other directions, can solve the problems of large copper nanoparticles, large amount of dispersant, and high reaction temperature, and achieve the effects of uniform copper nanoparticles, low production cost, and low reaction temperature.

Inactive Publication Date: 2011-07-06
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the publication number is CN101104205A, and the name is the method for manufacturing copper nanoparticles and the invention patent application for copper nanoparticles manufactured by the method, which discloses that the dispersant and reducing The salt is dissolved in a polar solvent to form the second solution, and the second solution is injected hot into the first solution at one time to obtain 20-50 nm copper nanoparticles. The dispersant includes PVP (polyvinylpyrrolidone), CTAB (decabromide At least one of hexaalkyltrimethylammonium), SDS (sodium dodecyl sulfate) and NA-CMC, the reducing agent is at least one of sodium dihydrogen phosphate, hydrazine, hydrochloride and sodium borohydride, very The solvent is at least one of ethylene glycol, diethylene glycol, triethylene glycol and p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of preparation method of copper nanoparticle, takes by weighing 2g copper nitrate and is dissolved in 8L dehydrated alcohol, constantly stirs and makes copper nitrate dissolve completely, obtains the copper nitrate clarification solution that concentration is 0.25g / L; Takes 8g ethanolamine and dissolves in In 2L of absolute ethanol, stir until the ethanolamine is completely dissolved to obtain a clear solution with a concentration of 4 g / L ethanolamine; weigh 8g of PVP and dissolve it in 2L of absolute ethanol, stir until the PVP is completely dissolved, and obtain a clear solution of PVP with a concentration of 4g / L solution; the three clear solutions are uniformly mixed into a reaction solution, heated in a water bath or an oil bath and continuously stirred and refluxed, and reacted until the color of the reaction solution becomes a stable bronze color at a constant temperature of 66° C. Heating, stirring and naturally cooling to room temperature to obtain a col...

Embodiment 2

[0017] A preparation method of copper nanoparticles is basically the same as in Example 1, except that 1g of copper nitrate is dissolved in 6L of anhydrous methanol, 4g of ethanolamine is dissolved in 2L of anhydrous methanol, and 6g of PVP is dissolved in 2L of anhydrous methanol , constant temperature reaction under 60 DEG C of reaction solution temperature. The average particle size of the obtained copper nanoparticles was about 5 nm.

[0018] In the above two examples, due to the existence of ethanolamine, it is well miscible with low-molecular-weight alcohols and well miscible with PVP, so that the reaction ability is improved, the reaction temperature is lowered, and it can also react normally below 70 ° C, and a relatively high temperature is obtained. Uniform, monodisperse copper nanoparticles.

Embodiment 3

[0020] A preparation method of copper nanoparticles is basically the same as in Example 1, except that 9g of copper nitrate is dissolved in 10L of anhydrous propanol, 16g of ethanolamine is dissolved in 2L of anhydrous propanol, and 18g of PVP is dissolved in 2L of anhydrous In propanol, the temperature of the reaction solution is a constant temperature reaction at 78°C. The average particle size of the obtained copper nanoparticles is about 6 nm; in this embodiment, the temperature can also be lowered to 70°C for constant temperature reaction, and relatively uniform and monodisperse copper nanoparticles can also be obtained.

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Abstract

The invention discloses a method for preparing copper nanometer granules, which comprises the following steps: respectively preparing clear copper nitrate solution with concentration of 0.1-0.9 g/L, clear ethanolamine solution with concentration of 2-8g/L, and clear polyvinylpyrrolidone solution with concentration of 3-9g/L by taking low-molecular alcohol as solvent, mixing the three solutions into reaction liquid at the temperature of 60 DEG C to 80 DEG C for reaction until presenting a stable bronze color, and carrying out cooling, evaporation and drying to obtain copper nanometer granules;in the method, the reaction temperature is lower, the normal reaction can be carried out even at the temperature lower than 70 DEG C, the production cost is lower, the equipment is simple, the production is convenient, the average granule diameter of the obtained copper nanometer granules is no more than 10nm, and the copper nanometer granules are uniform monodisperse granules without binding, therefore, the material performance is better.

Description

technical field [0001] The invention relates to a method for preparing nanoparticles, in particular to a method for preparing copper nanoparticles. Background technique [0002] Because nano-copper powder (less than 100 nm) has the characteristics of small size, large specific surface area, small resistance, quantum size effect, and macroscopic quantum tunneling effect, it has some new characteristics different from conventional materials. These characteristics determine the nano-copper powder. The scope of application is very wide. For example, nano-copper powder can be directly used as a catalyst in the chemical industry (such as acetylene polymerization), and nano-copper powder can also be used as electromagnetic shielding coatings, high-grade lubricants, and electronic pastes. Nano-metal particles such as copper can be made into conductive fibers, and Cu nanoparticles can be doped in optical glass to prepare nonlinear optical materials. At the same time, nano-Cu powder ...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 徐键董建峰罗鹏徐真武赵丽霞李健子
Owner NINGBO UNIV
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