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Continuous preparation method of nano-copper

A nano-copper and copper salt technology, applied in nanotechnology and other directions, can solve the problems of harsh preparation conditions, high purification cost, and difficulty in continuous preparation of nano-copper, and achieve the effects of controlling nucleation and growth, simple process flow, and continuous preparation.

Active Publication Date: 2018-12-07
珠海市彩龙科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems in the prior art that the conditions for the preparation of nano-copper are harsh, the cost of purification in the later stage is high, and it is difficult to continuously prepare the problem, the present invention provides a method for continuously preparing nano-copper

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  • Continuous preparation method of nano-copper

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Effect test

Embodiment 1

[0044] The present embodiment has prepared nano-copper A, and concrete steps are:

[0045] (1) Dissolve 50g of copper sulfate in deionized water, stir evenly, add a certain amount of ammonia water, adjust the pH to 12, and form a copper ammonia complex. The solution changes from light blue to dark blue, and then add the dispersant to the copper salt solution , stirring evenly to prepare a copper salt dispersion, the dispersant is sodium dodecylbenzenesulfonate, wherein the molar ratio of the copper salt to the dispersant is 1:2;

[0046] (2) dissolving the reducing agent in deionized water, stirring evenly to prepare a reducing solution, the reducing agent is hydrazine hydrate, and the ratio of the copper salt to the reducing agent is 1:2.5;

[0047] (3) Dissolving the protective agent in deionized water to prepare a protective solution, the protective agent is polyvinylpyrrolidone, and the molar ratio of the copper salt to the protective agent is 1:5;

[0048] (4) Use a cons...

Embodiment 2

[0053] The present embodiment has prepared nano-copper B, and concrete steps are:

[0054] (1) Dissolve 50g of copper nitrate in deionized water, stir evenly, add a certain amount of ammonia water to make the solution change from light blue to dark blue to form a copper ammonia complex, adjust the pH to 10, then add the dispersant to the copper salt solution, Stir evenly to prepare a copper salt dispersant mixed solution. The dispersant is fatty alcohol polyoxyethylene ether and fatty alcohol polyoxyethylene ether sodium sulfate mixed in a molar ratio of 1:1, wherein the molar ratio of copper salt to dispersant is 1:6;

[0055] (2) dissolving the reducing agent in deionized water, stirring evenly to prepare a reducing solution, the reducing agent is sodium borohydride, and the ratio of the copper salt to the reducing agent is 1:5;

[0056] (3) Dissolving the protective agent in deionized water to prepare a protective solution, the protective agent is polyvinylpyrrolidone and s...

Embodiment 3

[0060] The present embodiment has prepared nano-copper C, and concrete steps are:

[0061] (1) Take 50g of copper chloride and dissolve it in deionized water, stir evenly, add a certain amount of ammonia water to make the solution change from light blue to dark blue to form a copper ammonium complex, and adjust the pH to 13. Then add the dispersant to the copper salt solution, stir evenly to prepare a mixed solution of copper salt dispersant, the dispersant is lignosulfonate, and the molar ratio of copper salt to dispersant is 1:10;

[0062] (2) dissolving the reducing agent in deionized water, stirring evenly to prepare a reducing solution, the reducing agent is ascorbic acid, and the ratio of the copper salt to the reducing agent is 1:10;

[0063] (3) The protective agent is dissolved in deionized water to prepare a protective solution. The protective agent is hexadecyltrimethylammonium bromide, and the molar ratio of the copper salt to the protective agent is 1:10;

[0064...

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Abstract

The invention provides a continuous preparation method of nano-copper. The continuous preparation method of the nano-copper comprises the steps that a dispersing agent is dissolved in water, copper slat is added, the pH is adjusted, and then a copper slat dispersion solution is obtained; a reducing agent is dissolved in water, so that a reducing solution is obtained; the protective agent is dissolved in water, so that a protective solution is obtained; and finally, after the prepared copper slat dispersion solution, the reducing solution and the protective solution are fed into a micro-mixer to perform a reaction, the product is purified, and then nano-copper is obtained. Compared with the prior art, the continuous preparation method of the nano-copper achieves continuous preparation of the nano-copper in the manner that the dispersion solution, the reducing solution and the protective solution are independently prepared first of all, and then the three mixed solutions conduct the reaction through the micro-mixer to prepare the nanometer copper; the test conditions are gentle, purification is easy in the later period, cost is low, the micromixing time is shortened, nucleation and growth of crystals can be effectively controlled, and the prepared nano-copper particles are small and uniform in particle size; and the adopted protective agent enables nano-copper colloid to keep stable and avoid agglomeration for a long time.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, and in particular relates to a continuous preparation method of nanometer copper. Background technique [0002] Due to its small particle size and large specific surface area, nano-copper has better performance than conventional copper materials, such as strong microwave absorption, low melting point and high toughness, etc. At the same time, the price is more affordable than gold and silver, and the reserves are more abundant. , so it has been widely studied at home and abroad, and can be used as catalysts, lubricating oil additives, conductive materials, micro-nano link materials, and antibacterial materials. [0003] At present, the methods for preparing nano-copper mainly include microemulsion method, hydrothermal method, sol-gel method, ball milling method and liquid phase reduction method. Among them, the use of microemulsion method to prepare nano-copper has the disadvantag...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 郭汾阳
Owner 珠海市彩龙科技有限公司
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