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Method for preparing ultrafine copper powder by adopting microemulsion

A technology of ultra-fine copper powder and microemulsion, which is applied in the field of preparation of ultra-fine copper powder, can solve the problems of difficulty in meeting the requirements of industrialization, copper powder is easy to adhere to the cathode, and the particle size distribution is wide, so as to achieve self-desorption Good performance, easy to clean, and short production process

Active Publication Date: 2018-10-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above-mentioned preparation of ultrafine copper powder by electrodeposition method has great difficulties in industrial production because of the existence of copper powder which is easy to adhere to the cathode and cannot be self-desorbed; Problems such as agglomeration, wide particle size distribution, and copper powder oxidation make it difficult to meet the requirements of industrialization

Method used

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  • Method for preparing ultrafine copper powder by adopting microemulsion
  • Method for preparing ultrafine copper powder by adopting microemulsion

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A kind of method that adopts microemulsion to prepare ultrafine copper powder of the present embodiment, comprises the following steps:

[0030] (1) Preparation of electrolyte: Weigh the following raw materials according to the ratio per liter of electrolyte: anionic surfactant sodium dibutylnaphthalene sulfonate 1.0g, nonionic surfactant fatty alcohol polyoxyethylene ether 3.0g, CuSO 4 ·5H 2 0.25.0g; The anionic surfactant sodium dibutylnaphthalene sulfonate and the nonionic surfactant fatty alcohol polyoxyethylene ether are added to the water of 200ml, and mechanical stirring 10min obtains the composite surfactant solution; The CuSO 4 ·5H 2 O was dissolved in 200ml of water to obtain a copper sulfate solution; the composite surfactant solution was added to the copper sulfate solution, water was added to prepare a 1L aqueous solution, and sulfuric acid was added to adjust the pH value of the solution to 4; ultrasonic dispersion was used for 30 minutes to prepare int...

Embodiment 2

[0036] A kind of method that adopts microemulsion to prepare ultrafine copper powder of the present embodiment, comprises the following steps:

[0037](1) Preparation of electrolyte: Weigh the following raw materials according to the proportion of each liter of electrolyte: anionic surfactant sodium dibutylnaphthalene sulfonate 0.5g, nonionic surfactant Tween 80 5.0g, CuSO 4 ·5H 2 O 25.0g; The anionic surfactant sodium dibutylnaphthalene sulfonate and the nonionic surfactant Tween 80 are added to the water of 200ml, mechanically stirred for 30min to obtain a composite surfactant solution; the CuSO 4 ·5H 2 O was dissolved in 200ml of water to obtain a copper sulfate solution; the composite surfactant solution was added to the copper sulfate solution, water was added to prepare a 1L aqueous solution, and sulfuric acid was added to adjust the pH value of the solution to 5; mechanical dispersion was used for 60 minutes to prepare into electrolyte;

[0038] (2) Electrodeposition...

Embodiment 3

[0043] A kind of method that adopts microemulsion to prepare ultrafine copper powder of the present embodiment, comprises the following steps:

[0044] (1) Preparation of electrolyte: Weigh the following raw materials according to the proportion per liter of electrolyte: 7.0 g of anionic surfactant sodium dibutylnaphthalene sulfonate, 3.0 g of nonionic surfactant (including 2.4 g of fatty alcohol polyoxyethylene ether, Polyvinylpyrrolidone 0.6g), CuSO 4 ·5H 2 0.50g; the anionic surfactant sodium dibutylnaphthalene sulfonate and the nonionic surfactant (fatty alcohol polyoxyethylene ether and polyvinylpyrrolidone) are added to the water of 200ml, and mechanically stirred for 20min to obtain a composite surface Activator solution; the CuSO 4 ·5H 2 O was dissolved in 200ml of water to obtain a copper sulfate solution; the composite surfactant solution was added to the copper sulfate solution, water was added to prepare a 1L aqueous solution, and sulfuric acid was added to adju...

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Abstract

The invention discloses a method for preparing ultrafine copper powder by adopting a microemulsion. The method comprises the following steps that (1), anionic surfactant, nonionic surfactant, CuSO4.5H2O and water in a certain proportion are selected to prepare an electrolyte; (2), electrodepositing is carried out on the electrolyte, and a superfine copper powder mixed solution is obtained; (3), the superfine copper powder is extracted, wherein filtration or centrifugal treatment is carried out on the ultrafine copper powder mixed solution, after suction filtration and drying are carried out, the ultrafine copper powder is obtained; and (4), the ultrafine copper powder is put into a packaging bag, and the packaging bag is filled with inert gas, and then is sealed and stored. According to the method, the ultrafine copper powder prepared by the method has the characteristics that the particle size range is 200-600 nm, the purity is 99% or above, the particle size distribution is uniform,and the morphology consistency is good; in the preparation process, the copper powder cannot be adhered to a cathode plate, the self-desorption performance is good, polar plates are easy to clean, andautomatic and continuous production can be realized; the amount of corrosion to an anode plate is small, the environment pollution is little, and the energy consumption is low; and the prepared ultrafine copper powder is good in dispersibility and easy to collect.

Description

technical field [0001] The invention relates to a method for preparing ultrafine copper powder, in particular to a method for preparing ultrafine copper powder by using microemulsion. Background technique [0002] Ultrafine powder materials are a field developed with the rise of modern high-tech industries after the 1970s, and have received extensive attention at home and abroad. The concept of "ultrafine" in my country is still very controversial at present. According to different industries, the definition of the concept of ultrafine powder is also different. Generally speaking, ultrafine powder is a series of ultrafine materials from micron to nanometer. In my country, the current definition of ultrafine powder is powder with a particle size of 100% less than 30 µm. Generally, powders with a particle size larger than 1 µm are called micron materials, powders with a particle size smaller than 1 µm and larger than 0.1 µm are called submicron materials, and powders with a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/02
CPCC25C5/02
Inventor 苏玉长岳士翔罗中保热比古丽图尔荪喻秋山张晶
Owner CENT SOUTH UNIV
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