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In-situ organic matter coated nano-copper powder and preparation method thereof

An in-situ coating and nano-copper powder technology, applied in the field of materials engineering, can solve the problems of nano-copper powder agglomeration, low reactant concentration, and low production efficiency, and achieve the effects of preventing agglomeration, high purity, and low equipment requirements

Active Publication Date: 2018-05-15
宁波七诺新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The liquid-phase reduction method adopts the strategy of first complexation and then reduction, but this method has the problems of low concentration of reactants and low production efficiency. Due to the traditional mechanical stirring method used in the preparation process, it is easy to lead to agglomeration and oxidation of nano-copper powder; for The prepared nano-copper powder often needs to be passivated in oleic acid

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  • In-situ organic matter coated nano-copper powder and preparation method thereof
  • In-situ organic matter coated nano-copper powder and preparation method thereof
  • In-situ organic matter coated nano-copper powder and preparation method thereof

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Embodiment 1

[0047] The preparation method of the nano-copper powder of embodiment 1 coating organic matter in situ

[0048] 1) A certain amount of naphthalenesulfonate formaldehyde condensate is added to deionized water until it is fully dissolved, so that the concentration of naphthalenesulfonate formaldehyde condensate is 5g / L;

[0049] 2) Add a certain amount of polyvinylpyrrolidone to the solution obtained in step 1), and wait for it to fully dissolve, so that the final concentration of polyvinylpyrrolidone is 9g / L;

[0050] 3) Add copper sulfate pentahydrate to the solution obtained in step 2), stir until it is fully dissolved, so that the final concentration of copper ions is 10mmol / L;

[0051] 4) Adjust the solution obtained in step 3) with 1mol / L sodium hydroxide solution until the pH value of the solution is 10±0.5;

[0052] 5) Warm up the solution obtained in step 4) to 50°C, add dropwise a hydrazine hydrate solution with a mass fraction of 50%, so that the molar ratio of hydra...

Embodiment 2

[0059] The preparation method of the nano-copper powder of embodiment 2 coating organic matter in situ

[0060] 1) A certain amount of naphthalenesulfonate formaldehyde condensate is added to deionized water until it is fully dissolved, so that the concentration of naphthalenesulfonate formaldehyde condensate is 5g / L;

[0061] 2) Add a certain amount of polyvinylpyrrolidone to the solution obtained in step 1), and wait for it to fully dissolve so that the final concentration of polyvinylpyrrolidone is 6g / L;

[0062] 3) Add copper nitrate to the solution obtained in step 2), stir until it is fully dissolved, so that the final concentration of copper ions is 50mmol / L;

[0063] 4) Adjust the solution obtained in step 3) with 1mol / L sodium hydroxide solution until the pH value of the solution is 10±0.5;

[0064] 5) Warm up the solution obtained in step 4) to 50°C, add dropwise a hydrazine hydrate solution with a mass fraction of 50%, so that the molar ratio of hydrazine hydrate t...

Embodiment 3

[0066] The preparation method of the nano-copper powder of embodiment 3 coating organic matter in situ

[0067] 1) A certain amount of naphthalenesulfonate formaldehyde condensate is added to deionized water until it is fully dissolved, so that the concentration of naphthalenesulfonate formaldehyde condensate is 20g / L;

[0068] 2) Add a certain amount of polyvinylpyrrolidone to the solution obtained in step 1), and wait for it to fully dissolve, so that the final concentration of polyvinylpyrrolidone is 9g / L;

[0069] 3) Add copper chloride to the solution obtained in step 2), stir until it is fully dissolved, so that the final concentration of copper ions is 30mmol / L;

[0070] 4) Adjust the solution obtained in step 3) with 1mol / L sodium hydroxide solution until the pH value of the solution is 10±0.5;

[0071] 5) Warm up the solution obtained in step 4) to 60°C, add dropwise an ascorbic acid solution with a mass fraction of 30%, so that the molar ratio of ascorbic acid to co...

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Abstract

The invention provides in-situ organic matter coated nano-copper powder and a preparation method thereof. The preparation method comprises the steps of adding copper salt into a water solution containing a dispersing agent and optionally containing a water-soluble macromolecule, dissolving, and uniformly mixing; adding an alkaline solution, and adjusting pH to 10+ / -0.5; and then adding a reducingagent, warming to 30 to 100 DEG C, reacting for 30 to 240min, reacting for 10 to 60min under an ultrasonic condition, cooling, centrifuging, separating, precipitating, and drying to obtain the in-situorganic matter coated nano-copper powder. The nano-copper powder prepared through the method provided by the invention is uniform in particle size, good in dispersibility, and good in stability; andthe dispersing agent coated on a surface of a copper particle can effectively prevent the copper particle from being oxidized. The preparation method is simple, low in equipment requirement, big in economic benefit, and wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of material engineering, in particular to a nano-copper powder coated with organic matter in situ and a preparation method thereof. Background technique [0002] In recent years, the liquid-phase reduction method is the most reported and researched method for preparing nano-copper powder. Through a suitable reducing agent, the copper-containing compound is reduced to copper powder in solution. This method can be used to prepare nanoscale noble metal powders with good dispersibility and uniform particle size distribution, but the activity of copper is much stronger than that of precious metals such as gold and silver. How to solve the problem of surface oxidation of the obtained copper nanoparticles is still a problem in the production process. key. [0003] The liquid-phase reduction method adopts the strategy of first complexation and then reduction, but this method has the problems of low reactant concent...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F9/24B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/102B22F1/054
Inventor 马永梅黄敏张京楠郑鲲易丹青刘会群
Owner 宁波七诺新材料科技有限公司