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Method for preparing flaky nano copper powder

A technology of nano-copper powder and flakes, which is applied in the field of preparation of flake-shaped nano-copper powders, can solve the problems of uneven particle size and easy agglomeration of spherical nano-copper powders, achieve uniform shape, narrow particle distribution, avoid agglomeration and The effect of growing up

Inactive Publication Date: 2010-11-24
尊领科技集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spherical nano-copper powder has the disadvantages of uneven particle size and easy agglomeration.

Method used

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  • Method for preparing flaky nano copper powder
  • Method for preparing flaky nano copper powder
  • Method for preparing flaky nano copper powder

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Experimental program
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Effect test

Embodiment 1）

[0015] The preparation method of the flaky nano-copper powder of the present embodiment has the following steps:

[0016] ①Sequentially weigh 100.0g of copper sulfate aqueous solution with a concentration of 0.01mol / L, 5.0g of SDS and 5.0g of Tween-80, put them into a beaker in turn, and mix the materials in the beaker by mechanical oscillation to obtain The mixed solution A containing copper sulfate was transferred to a 250ml three-necked flask for use. The water, SDS and Tween-80 in the copper sulfate aqueous solution form a surfactant complex system.

[0017] ②Sequentially weigh 100.0g of sodium borohydride aqueous solution with a concentration of 0.01mol / L, 5.0g of SDS and 5.0g of Tween-80, put them into a beaker in turn, and mix the materials in the beaker thoroughly by mechanical oscillation. A mixed solution B containing sodium borohydride was obtained. Water, SDS and Tween-80 in the sodium borohydride aqueous solution form a surfactant complex system.

[0018] ③Unde...

Embodiment 2）

[0021] ①Sequentially weigh 95.0g of copper sulfate aqueous solution with a concentration of 0.01mol / L, 10.0g of SDS and 5.0g of Tween-80, put them into a beaker in turn, and mix the materials in the beaker by mechanical oscillation to obtain The mixed solution A containing copper sulfate was transferred to a 250ml three-necked flask for use. The water, SDS and Tween-80 in the copper sulfate aqueous solution form a surfactant complex system.

[0022] ②Sequentially weigh 95.0g of sodium borohydride aqueous solution with a concentration of 0.01mol / L, 10.0g of SDS and 5.0g of Tween-80, put them into a beaker in turn, and mix the materials in the beaker thoroughly by mechanical oscillation A mixed solution B containing sodium borohydride was obtained. Water, SDS and Tween-80 in the sodium borohydride aqueous solution form a surfactant complex system.

[0023] ③At a temperature of 25°C and under stirring, drop the mixed solution A containing copper sulfate obtained in step ① into ...

Embodiment 3～ Embodiment 6）

[0026] Each embodiment is basically the same as Embodiment 1, and the differences are shown in Table 1. The concentration of the copper salt aqueous solution is 0.01 mol / L, and the concentration of the reducing agent aqueous solution is also 0.01 mol / L.

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Abstract

The invention discloses a method for preparing flaky nano copper powder, comprising the following steps: compounding a copper salt aqueous solution with a surfactant to obtain a mixed solution A, wherein the water in the copper salt aqueous solution and the surfactant form a surfactant compound system; (2) compounding a reducing agent aqueous solution with the surfactant which is the same as that used in step (1) to obtain a mixed solution B, wherein the water in the reducing agent aqueous solution and the surfactant form the surfactant compound system; (3) mixing the mixed solution B obtained in step (2) and the mixed solution A obtained in step (1) by stirring at the temperature of 20 DEG C to 80 DEG C, and reacting completely with stirring; and (4) carrying out solid and liquid separation on the product, washing the solid, and carrying out vacuum drying to obtain the flaky nano copper powder. The method of the invention has mild condition, simple process, short production period, low equipment investment and low preparation cost, and is easy to realize industrial production. The prepared flaky nano copper powder has consistent appearance, uniform size and good dispersibility.

Description

technical field [0001] The invention relates to a method for preparing metal powder, in particular to a method for preparing flake nano-copper powder. Background technique [0002] Nano-copper powder is widely used in advanced lubricants, conductive adhesives, and clean energy catalytic materials. [0003] At present, the preparation methods of nano-copper powder mainly include: vacuum evaporation, vacuum sputtering, chemical reduction, radiation reduction, reduction in supercritical fluid atmosphere, laser crushing and other methods. [0004] There are also some patent documents disclosing the preparation method of spherical nano-copper powder, such as CN1191142C, CN1247354C, CN1188700A and other patent documents all disclose the preparation method of spherical nano-copper powder. However, the spherical nano-copper powder has disadvantages such as uneven particle size and easy agglomeration. Contents of the invention [0005] The object of the present invention is to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 李中春尚通明周全法
Owner 尊领科技集团有限公司
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