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Preparation method for antioxidant copper nanopowder

A nano-copper powder, anti-oxidation technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effect of good dispersion, low cost and high purity

Active Publication Date: 2016-09-21
JINLING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for easy production without expensive equipment or complicated steps while producing highly pure metal nanoparticles that have excellent properties like conductivity and stability over time.

Problems solved by technology

Technological Problem: The technical problem addressed in this patents relating to improving the properties of small electronic devices such as microsystems (MEMS) made up of tiny parts called nanosheets), which have unique features like being able to absorb light signals without losing their effectiveness when exposed to sunlight. Current methods involve adding various substances into solutions containing fine particles of metal flakes suspended in water, resulting in poorer quality nanocomposite films than desired because they may lose some important qualities overtime.

Method used

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  • Preparation method for antioxidant copper nanopowder
  • Preparation method for antioxidant copper nanopowder

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 3g of copper sulfate pentahydrate and dissolve it in a beaker with 100mL of deionized water, adjust the pH value to 11 with concentrated nitric acid or concentrated ammonia water, and make solution A. In addition, weigh 2.26g of hydrazine hydrate and add 100mL of deionized water to form solution B. Drop solution B into solution A at a rate of 20mL / min, magnetically stir at a constant temperature of 30°C, and continue stirring for 30 minutes after dropping to obtain copper sol, which is flocculent and poorly dispersible. Centrifuge the copper sol to separate the copper particles, wash them three times with deionized water and once with absolute ethanol, and dry them under vacuum at 60°C to obtain copper powder. figure 1 As shown in 1#, there is a small amount of Cu on the surface 2 O and CuO, the average particle size of copper powder measured by laser particle size analyzer is 600nm.

Embodiment 2

[0031] Weigh 5g of copper sulfate pentahydrate and 1g of polyvinylpyrrolidone (PVP) and dissolve them in a beaker with 100mL of deionized water, add 0.2g of benzotriazole (BTA) into 5mL of absolute ethanol to dissolve them and add them to the copper sulfate solution. Adjust the pH value to 11 with nitric acid or concentrated ammonia water to prepare solution A. In addition, weigh 3.76g of hydrazine hydrate and add 100mL of deionized water to form solution B. Drop solution B into solution A at a rate of 10mL / min, magnetically stir at a constant temperature of 30°C, and continue stirring for 30min after dropping to obtain a copper sol without agglomeration. The copper sol was centrifuged to separate the copper particles, washed three times with deionized water and one time with absolute ethanol, and dried in vacuum at 60°C to obtain copper powder, which was tested by XRD as shown in figure 1 As shown in 2#, compared with Example 1 as a comparative example, there is no oxide on ...

Embodiment 3

[0033] Weigh 5g of copper sulfate pentahydrate and 1g of PVP with 100mL of deionized water and dissolve in a beaker, add 0.2g of BTA into 5mL of absolute ethanol to dissolve, adjust the pH value to 11 with concentrated nitric acid or concentrated ammonia water, and make solution A. Another 6.27g of hydrazine hydrate was weighed and added to 100mL of deionized water to form solution B. The B solution was dripped into the A solution at a rate of 10 mL / min, magnetically stirred at a constant temperature of 30 ° C, and continued to stir for 30 min after the drop was completed to obtain a copper sol. Copper sol was centrifuged to separate copper particles, washed three times with deionized water and once with absolute ethanol, and dried in vacuum at 60°C to obtain copper powder. The average particle size was 372nm as measured by a laser particle size analyzer.

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Abstract

The invention discloses a preparation method for antioxidant copper nanopowder. The preparation method includes the following steps that copper sulfate pentahydrate serves as a raw material, deionized water is a solvent preparation solution, benzotriazole and polyvinylpyrrolidone are added to the solution, the pH value is adjusted with concentrated nitric acid or stronger ammonia water, and a solution A is prepared; a hydrazine hydrate solution with the concentration ranging from 0.02 g/mL to 0.2 g/mL is prepared to serve as a solution B; the solution B is dropwise injected into the solution A slowly at the temperature of 30 DEG C to 70 DEG C, then the mixture is stirred continuously for 20 min to 30 min after dropwise-injecting operation is completed, and copper sol is obtained; and the obtained copper sol is centrifugally separated, copper particles are obtained, the copper particles are washed with the deionized water for three times and washed with absolute ethyl alcohol once, finally vacuum drying treatment is conducted, and the copper nanopowder with the particle diameter ranging from 80 nm to 600 nm is obtained. The preparation method has the beneficial effects that the experiment is easy to implement, cost is low, and the prepared copper nanopowder is high in purity and good in dispersity.

Description

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Claims

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Application Information

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Owner JINLING INST OF TECH
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