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Antioxidation method of nano copper powder

A nano-copper powder, anti-oxidation technology, applied in the field of anti-oxidation of nano-copper powder, can solve problems such as corrosion of copper powder surface, powder oxidation, etc., to achieve the effect of preventing oxidation, blocking further corrosion, and good anti-oxidation performance

Active Publication Date: 2013-02-27
JIANGSU BOQIAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the powder collection process of the PVD method, a small amount of water will be introduced into the system more or less, and some oxygen will also be attached to the system. As time goes by, copper powder, water and oxygen will form a primary battery and an electrochemical reaction will occur. Corrosion of copper powder surface, resulting in powder oxidation

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  • Antioxidation method of nano copper powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) choose citric acid to be dissolved in deionized water, be made into the citric acid aqueous solution that concentration is 0.5%, the solution pH value is 2.

[0029] (2) Add the nano-copper powder prepared by the PVD method into the above-mentioned citric acid aqueous solution, keep stirring, track and measure the pH value of the solution, and add the citric acid aqueous solution to the slurry in due course, so that the pH value of the solution is maintained between 2 and 2.5 After stirring for 1 hour, let it stand still, filter off the supernatant, and obtain a copper powder slurry.

[0030] (3) Select BTA as copper powder corrosion inhibitor, and be configured into 0.5% BTA aqueous solution, disperse the copper powder slurry of above-mentioned step (2) among them, leave standstill after stirring 1h, supernatant liquid is filtered, obtains copper Powder slurry.

[0031] (4) Using absolute ethanol to replace the copper powder slurry obtained in step (3) 3 times to ...

Embodiment 2

[0038] (1) Select oxalic acid to be dissolved in deionized water to prepare a 0.5% organic acid aqueous solution, and the pH value of the solution is 2.

[0039] (2) Add copper powder into the above organic acid solution, keep stirring, track and measure the pH value of the solution, and add oxalic acid aqueous solution to the slurry in due course, so that the pH value of the solution is maintained between 2 and 2.5, and the stirring time is up to 1h After standing still, the supernatant was filtered off.

[0040] (3) Select triethanolamine as the copper powder corrosion inhibitor, and configure it into a 0.5% triethanolamine aqueous solution, disperse the above-mentioned copper powder slurry in it, stir for 1 hour and let it stand, filter the supernatant to obtain the copper powder slurry .

[0041] (4) Utilize isopropanol to replace copper powder slurry 3 times to obtain copper powder slurry containing isopropanol.

[0042] (5) Choose stearic acid as copper powder corrosio...

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Abstract

The invention discloses an antioxidation method of nano copper powder, which comprises the steps of: preparing an organic acid aqueous solution the mass concentration of which is 0.1 to 2 percent and controlling the pH within the range of 1 to 5; adding copper powder into the organic acid aqueous solution, mixing continuously, then standing for a certain time, and filtering the supernatant liquor; preparing copper powder anticorrosive solution the mass concentration of which is 0.1 to 2 percent; adding copper powder pulp into the copper powder anticorrosive solution, fully mixing, standing, filtering the supernatant liquor, and obtaining the copper powder pulp; carrying out metathesis on the copper powder pulp for 2 to 4 times by utilizing an organic solvent, and then classifying the copper powder pulp; weighing alcohol-soluble organic the weight of which is 0.1 to 5 percent of that of the copper powder in the copper powder pulp, dissolving the alcohol-soluble organic into an alcohol solvent, preparing a copper powder anticorrosive solution the concentration of which is 0.25 to 5 percent, and adding the obtained copper powder pulp into the copper powder anticorrosive solution and mixing for 0.5 to 2 hours. By the antioxidation method of nano copper powder, a layer of protective film can be covered on the surface of the nano copper powder and effectively isolate oxygen, thus the purpose of antioxidation of copper powder is achieved.

Description

technical field [0001] The invention relates to an anti-oxidation method of nanometer copper powder. Background technique [0002] Nano-copper powder (generally 100-1000nm in particle size) can not only be directly used as a catalyst in the chemical industry, but also an indispensable basic material for high-conductivity, high-strength nanomaterials. At present, there are many methods for preparing nano-copper powder, which can be roughly divided into two categories: [0003] (1) chemical method [0004] Mainly including precipitation method, hydrothermal synthesis method, sol-gel method, etc. The purity of nano copper powder prepared by such chemical methods is low, the particle size is not easy to control during the preparation process, and the shape is not uniform, which seriously restricts its application in the semiconductor industry. [0005] (2) Physical method [0006] PVD (Physical Vapor Deposition) method is a relatively mature physical method for preparing meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00
Inventor 蔡俊程遵义俞雪杰
Owner JIANGSU BOQIAN NEW MATERIALS CO LTD