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Preparation method for nano-copper powders

A technology of nano-copper powder and nano-copper oxide, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of inability to separate copper powder, easily blockage of reactors, and pollute the environment, and achieve low cost and high synthesis Simple process steps and good performance

Pending Publication Date: 2020-04-10
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method involves the extraction and distillation of organic reagents such as benzene in the process of preparing nano-copper lubricating oil additives. The cost of the preparation process is high and the environment is polluted.
And the nano-copper particles prepared by this method can only exist in lubricating oil additives, and the copper powder cannot be separated for other fields
In addition, the high-gravity machine rotary packed bed used in this method needs to use packing, which is easy to block the reactor

Method used

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  • Preparation method for nano-copper powders
  • Preparation method for nano-copper powders
  • Preparation method for nano-copper powders

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A preparation method of nano copper powder, comprising the following steps:

[0046] The first step is to prepare nano-scale basic copper carbonate by precipitation reaction. The specific preparation method is to configure 2L of copper sulfate solution with a concentration of 0.25mol / L, and then configure 2L of sodium carbonate solution with a concentration of 0.30mol / L; Bed supergravity reactor and keep the reactor speed at 1200rmp, then inject copper sulfate solution and sodium carbonate solution into the reactor at the same time at a flow rate of about 0.1L / min respectively, after the reaction solution is injected, and then inject the reaction solution The solution is injected into the reactor and circulated for a period of time. After the reaction, the reaction solution is filtered sequentially, washed 4 to 6 times, and the sodium sulfate is washed out, and then dried in a blast drying oven at 100°C for about 12 hours to obtain nano Grade granular basic copper carbo...

Embodiment 2

[0050] Same as Example 1, the difference is that 20% ethylene glycol is added as a dispersant (surfactant) in the reaction solution of the first step.

Embodiment 3

[0052] Same as Example 1, the difference is that 10% polyethylene glycol is added as a dispersant (surfactant) in the reaction solution of the first step.

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Abstract

The invention relates to a preparation method for nano-copper powders. The preparation method comprises the following steps of: A: preparing nanoscale basic cupric carbonate by a method of precipitation: specifically, preparing a bivalent copper ion solution with certain concentration, then, preparing a precipitant solution with certain centration, starting a spiral channel type revolving bed hypergravity reactor, then, independently injecting two solutions into the reactor from different inlets according to a certain revolving speed to react to cause the two solutions to generate precipitation reaction, and after the reaction is finished, filtering, washing and drying a reaction liquid in sequence; B: carrying out calcination on a dried product to obtain a nanometer copper oxide; and C: reducing the nanometer copper oxide to obtain the nano-copper powders. The preparation method can stably produce the nano-copper powders with even particles on batch, and the produced nano-copper powders have a good application prospect on the aspects, including electric conduction, catalysis, lubrication and the like.

Description

technical field [0001] The invention relates to the technical field of metal powder preparation, in particular to a method for preparing nanometer copper powder. Background technique [0002] Nanotechnology is a technology that has been continuously researched and developed in recent decades. Due to the excellent performance of nanomaterials in terms of strength and performance, they have been widely used in all walks of life. At the same time, they have also been studied by governments and enterprises in various countries. play an important supporting role in the development of Therefore, it is also expected by researchers to develop an efficient and convenient technology for preparing nanomaterials. [0003] Nano-copper powder has a wide range of applications in lubricants, conductive materials, catalysts and other aspects. Due to the excellent performance of copper powder with small particle size, especially nano-scale copper powder, its performance in conductivity and c...

Claims

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Application Information

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IPC IPC(8): B22F9/22B22F9/24B82Y40/00C01G3/00C01G3/02B82Y30/00
CPCB22F9/22B22F9/24B82Y40/00C01G3/00C01G3/02B82Y30/00
Inventor 周继承周念余柳丽王婕
Owner XIANGTAN UNIV
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