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Method for preparing nano copper particle

A technology of nano-copper and particles, which is applied in the direction of nano-technology, can solve the problems of easy agglomeration, poor fluidity, and complex production of products, and achieve the effects of good dispersion, reduced production costs, and slowed down nucleation speed

Inactive Publication Date: 2011-09-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have high cost, high energy consumption, complex production, easy agglomeration of products, poor fluidity, and are difficult to meet the requirements of industries such as electronic conductive paste, lubricating oil and powder metallurgy.

Method used

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  • Method for preparing nano copper particle
  • Method for preparing nano copper particle
  • Method for preparing nano copper particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0036] 1) Prepare 0.2mol / L copper sulfate pentahydrate solution and 0.5mol / L oleic acid ethanol solution at a molar ratio of 4:1, and stir the mixture for 30 minutes to extract divalent copper ions into the organic phase, That is, the precursor solution is obtained.

[0037] 2) Add an appropriate amount of glucose aqueous solution to the above-mentioned precursor solution, the molar concentration ratio of glucose and copper salt is controlled at 2:1, and the molar ratio is controlled at 2.5:1; at room temperature, magnetically stir for 10 minutes, so that the divalent copper ions are Completely reduced to cuprous oxide.

[0038] 3) An appropriate amount of sodium hypophosphite solution is added to the above mixed solution, the molar concentration ratio of sodium hypophosphite to copper salt is 2:1, and the molar ratio is 2:1. In a water bath at 60°C, stir magnetically for 30 minutes to completely reduce the cuprous oxide to simple copper.

[0039] 4) The product was centrifu...

Embodiment 3

[0041] 1) Mix 0.2mol / L copper sulfate pentahydrate solution with a certain amount of oleic acid (0.1mol / L~1.0mol / L) solution in a molar ratio of 1:2. The mixed solution was stirred for 30 minutes, so that the divalent copper ions were extracted into the organic phase, and the precursor solution was obtained.

[0042] 2) Add an appropriate amount of glucose aqueous solution to the above-mentioned precursor solution, the molar concentration ratio of glucose and copper salt is 2:1, and the molar ratio is controlled at 1:2; at room temperature, magnetically stir for 10 minutes, so that the divalent copper ions are completely Reduction to cuprous oxide.

[0043] 3) Add an appropriate amount of sodium hypophosphite solution to the above mixed solution, the molar concentration ratio of sodium hypophosphite to copper salt is 2.5:1, and the molar ratio is controlled at 1:2. In a water bath at 60°C, stir magnetically for 30 minutes to completely reduce the cuprous oxide to simple coppe...

Embodiment 4

[0046] 1) Prepare a mixture of 0.5 mol / L copper sulfate pentahydrate solution and 1.0 mol / L oleic acid ethanol solution, and mix them at a molar ratio of 1:5. The mixture was stirred for 30 min to extract the divalent copper ions into the organic phase to obtain the precursor solution.

[0047] 2) Add an appropriate amount of glucose aqueous solution to the above-mentioned precursor solution, the molar concentration ratio of glucose and copper salt is 4:1, and the molar ratio is controlled at 3:1; at room temperature, magnetically stir for 10 minutes to completely dissolve the divalent copper ions Reduction to cuprous oxide.

[0048] 3) An appropriate amount of sodium hypophosphite solution is added to the above mixed solution, the molar concentration ratio of sodium hypophosphite to copper salt is 3:1, and the molar ratio is controlled at 4:1. Under 60°C water bath, magnetically stir for a certain period of time (60min-90min), so that the cuprous oxide is completely reduced ...

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Abstract

The invention relates to a method for preparing a nano copper particle, in particular to a novel method for preparing a nano copper particle serving as a lubricating oil additive. The synthesis method comprises the following steps of: dissolving water-soluble divalent copper salt into water; adding a proper amount of acid organic extracting agent and coating agent into the solution; extracting divalent copper ions to an organic phase; and then simply and efficiently preparing spherical nano copper particles which have good dispersion, uniform particle size and good oxidation resistance by adopting a two-step liquid phase reduction method. The method provided by the invention has the advantages such as simple process, convenience for operation, low cost, easiness for industrialization and the like; and the prepared nano copper particle has the advantages of good dispersion, uniform particle size, good oxidation resistance, good friction property and the like.

Description

technical field [0001] The invention relates to a method for preparing nano copper particles, in particular to a method for preparing nano copper particles used as lubricating oil additives. Background technique [0002] In recent years, as an important industrial raw material, nano-copper particles can greatly reduce industrial costs in the production of high-grade lubricants, conductive pastes, high-efficiency catalysts, etc., and have shown extremely important application value in various fields. Therefore, in recent years, the research on copper nanoparticles has attracted widespread attention at home and abroad. At present, there are many methods for preparing nano metal particles, including γ-ray radiation method, physical vapor deposition method, microemulsion method, high energy ball milling method, hydrothermal method, sol-gel method, chemical precipitation method, electrolysis method and so on. However, these methods have high cost, high energy consumption, comple...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 文谨刘昱阳陈启元李洁
Owner CENT SOUTH UNIV
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