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Preparation method of nano copper powder

A technology of nano-copper powder and nano-copper oxide, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of serious agglomeration, expensive equipment cost, and long preparation cycle, and achieve the goal of overcoming Easy to agglomerate, uniform heating, good uniformity effect

Active Publication Date: 2022-06-24
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods have their own advantages and disadvantages. The direct chemical synthesis method has less equipment investment, simple process, and high pass rate, but the particle size of the prepared nano-copper is uncontrollable, and at the same time, the agglomeration is serious; the biosynthesis method has low pollution and conforms to the 21st century green The theme of environmental protection, but its long preparation cycle cannot meet the development needs of the society; the physical method requires expensive equipment costs, and the particle size is uncontrollable, so it is not suitable for large-scale production

Method used

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  • Preparation method of nano copper powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of nano copper powder, comprising the following steps:

[0041]Step 1: prepare nano-copper oxide powder. The specific preparation method is as follows: configure 2 L of copper sulfate solution with a concentration of 0.20 mol / L, add 10 g of polyvinylpyrrolidone to it, and mix it uniformly to obtain the first surfactant (polyvinylpyrrolidone). ) copper salt solution; configure the concentration of 0.20mol / L sodium carbonate solution 1.5L at the same time, add 500mL of ethylene glycol and 10g polyvinylpyrrolidone to it, and mix to obtain the second surfactant (ethylene glycol and polyvinylpyrrolidone). ) of the precipitant solution, open the reactor and keep the speed of the reactor at 1200rmp, inject the copper sulfate solution and the sodium carbonate solution into the hypergravity reactor at a certain flow rate (0.3L / min) at the same time, after the injection is completed, then The obtained reaction solution was injected into the hypergravity react...

Embodiment 2～6

[0044] The preparation methods are the same as those in Example 1, and the difference from Example 1 is that in Example 2: in the first step of preparing the nano-copper oxide powder, the copper sulfate solution and the sodium carbonate solution are reacted in a constant gravity field, and the prepared The average particle size of the nano-copper powder is 160nm; in Example 3, in the first step of preparing the nano-copper oxide powder, the supergravity field, the rotating speed of the reactor is 800rmp, and the average particle size of the prepared nano-copper powder is 90nm Embodiment 4, in the step of preparing nano-copper oxide powder in the first step, the supergravity field, the rotating speed of the reactor is 900rmp, and the average particle size of the prepared nano-copper powder is 82nm; Embodiment 5, in the first step preparation In the step of nano-copper oxide powder, the supergravity field, the rotating speed of the reactor is 1000rmp, and the average particle siz...

Embodiment 7～13

[0049] The preparation method is the same as that of Example 1, and the difference from Example 1 is that the volume ratio of glycerol and hydrazine hydrate in step 2 is not the same. In Example 1, the volume ratio of glycerol and hydrazine hydrate is 9:1; Example 7, the volume ratio of glycerol and hydrazine hydrate is 3:1, and the particle size distribution of the prepared nano-copper powder is 50-90 nm; in Example 8, the volume ratio of glycerol and hydrazine hydrate is 4:1, and the prepared The particle size distribution of the prepared nano-copper powder is 40-80 nm; in Example 9, the volume ratio of glycerol and hydrazine hydrate is 5:1, and the particle size distribution of the prepared nano-copper powder is 40-70 nm; The volume ratio of triol and hydrazine hydrate is 6:1, and the particle size distribution of the prepared nano-copper powder is 40-65 nm; in Example 11, the volume ratio of glycerol and hydrazine hydrate is 7:1, and the prepared nano-copper powder The par...

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Abstract

The invention provides a preparation method of nano copper powder. The method comprises the following steps: simultaneously injecting a copper salt solution and a precipitant solution into a supergravity reactor for a supergravity reaction, and after the two solutions are completely injected, injecting the obtained reaction solution into the supergravity reactor and circulating for a first preset time to obtain a turbid liquid containing basic cupric carbonate, performing solid-liquid separation, washing, drying and calcining on the turbid liquid to obtain nano copper oxide powder; the preparation method comprises the following steps: violently stirring nano copper oxide powder, a dispersant and a first solvent to obtain a solution A; violently stirring a second solvent and a reducing agent to obtain a solution B; and slowly dropwise adding the solution B into the solution A, reacting for a second preset time to obtain a reaction product, and centrifuging, washing, drying and grinding the reaction product to obtain the monodispersed nano copper powder. The nano-copper powder is prepared by combining a supergravity reaction technology with a chemical reduction method, and the nano-copper powder has the advantages of being small in particle size, good in dispersity and controllable in particle size.

Description

technical field [0001] The invention belongs to the technical field of metal powder preparation, in particular to a preparation method of nano copper powder. Background technique [0002] As an emerging functional material, monodisperse nano-copper powder is widely used in electronics, machinery, construction, engineering, pharmaceuticals, agriculture, energy, environment and other fields due to its good thermal conductivity, electrical conductivity, ductility and overall non-toxicity. . In addition, as an important industrial raw material, monodisperse nano-copper powder can greatly reduce costs in replacing precious metal nano-materials, thereby improving economic benefits. Therefore, monodisperse nano-copper powder has great potential for development, and has received extensive attention from more and more researchers in recent years. At the same time, requirements are also put forward for the specifications of monodisperse nano-copper powder. For example, nano-copper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/054B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00
Inventor 周继承陶将杨天宇
Owner XIANGTAN UNIV