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Preparation of nano copper particle

A nano-copper and particle technology is applied in the field of preparation of nano-copper particles, which can solve the problems such as the inability to obtain particle size, and achieve the effects of pollution-free by-products, good dispersibility, and easy availability of raw materials.

Inactive Publication Date: 2010-02-17
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing nano-copper particles that is easy to operate, low-cost and environmentally friendly in view of the defects in the above-mentioned prior art, so as to solve the problem that the liquid-phase reduction method cannot produce nano-copper particles with small particle size and good dispersibility. Copper particle conundrum

Method used

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  • Preparation of nano copper particle
  • Preparation of nano copper particle
  • Preparation of nano copper particle

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0027] The preparation method of the nano-copper particles provided in this embodiment, the specific steps are as follows:

[0028] a) Preparation of template agent: add 0.02562 g of the fourth-generation product (4G) of polyamide-amine dendritic polymer with benzene ring as the core into 10 ml of twice-distilled water, stir at 15-30° C. to completely dissolve, Obtain 0.5mmol / L solution;

[0029] b) Preparation of copper salt solution: 0.02g CuSO 4 ·5H 2 Add O into 10ml double distilled water, stir at 15-30°C to dissolve completely, and obtain 8mmol / L solution;

[0030] c) At 15-30°C, add the above-prepared copper salt solution dropwise to the above-prepared template agent, after dropping, continue to stir for 1-2 hours, wherein: the molar ratio of copper salt to template agent is 16: 1;

[0031] d) At 15-30°C, add 0.012g NaBH 4 Add 10ml of twice-distilled water, now prepare 32mmol / L sodium borohydride solution, quickly add it into the mixed solution obtained in step c) a...

Embodiment 2

[0035] The preparation method of the nano-copper particles provided in this embodiment, the specific steps are as follows:

[0036] a) Preparation of template agent: add 0.02562 g of the fourth-generation product (4G) of polyamide-amine dendritic polymer with benzene ring as the core into 10 ml of twice-distilled water, stir at 15-30° C. to completely dissolve, Obtain 0.5mmol / L solution;

[0037] b) Preparation of copper salt solution: 0.02g CuSO 4 ·5H 2 Add O into 10ml double distilled water, stir at 15-30°C to dissolve completely, and obtain 8mmol / L solution;

[0038] c) At 15-30°C, add the above-prepared copper salt solution dropwise to the above-prepared template agent, after dropping, continue to stir for 1-2 hours, wherein: the molar ratio of copper salt to template agent is 16: 1;

[0039] d) At 15-30°C, add 0.006g NaBH 4 Add 10ml of secondary distilled water, now prepare 16mmol / L sodium borohydride solution, quickly add to the mixed solution obtained in step c) af...

Embodiment 3

[0043] The preparation method of the nano-copper particles provided in this embodiment, the specific steps are as follows:

[0044] a) Preparation of template agent: add 0.02562 g of the fourth-generation product (4G) of polyamide-amine dendritic polymer with benzene ring as the core into 10 ml of twice-distilled water, stir at 15-30° C. to completely dissolve, Obtain 0.5mmol / L solution;

[0045] b) Preparation of copper salt solution: 0.01g CuSO 4 ·5H 2 O was added to 10ml double-distilled water, stirred at 15-30°C to dissolve completely, and a 4mmol / L solution was obtained;

[0046] c) At 15-30°C, add the copper salt solution prepared above dropwise to the template agent prepared above, after dropping, continue to stir for 1-2 hours, wherein: the molar ratio of copper salt to template agent is 8: 1;

[0047] d) At 15-30°C, add 0.006g NaBH 4 Add 10ml of twice-distilled water, now prepare 16mmol / L sodium borohydride solution, quickly add to the mixed solution obtained in ...

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Abstract

The invention discloses a preparation method for nanometer copper grain, comprising the following steps: mixing and stirring a dentritic compound with a benzene ring core used as template agent and copper salt, using the strong coordination of a plurality of amino existing in the dentritic compound to make Cu<2+> complex in the inner part and the outer part of the cavity of the dentritic compound,and using reducing agent for reduction to convert bivalent copper to zero valent copper. The dentritic compound with a benzene ring core is adopted as the template agent, accordingly solving the problem of inability to obtain nanometer copper grain with small diameter and good dispersion in the prior liquidoid reduction method, obtaining even spherical nanometer copper grain with the average diameter between two and five nm and good dispersion by liquidoid reduction method. In addition, the preparation method for nanometer copper grain has the advantages of simple preparation method, easily available raw material, low cost, temperate conditions, low requirements for equipment, environmental friendly production process, and pollution-free by-product, thus being suitable for mass industrialproduction.

Description

technical field [0001] The invention relates to a method for preparing nano copper particles, belonging to the technical field of nano metal materials. Background technique [0002] Due to their special properties in optics, magnetism, heat, electronics, sensors and catalysis, nano-copper particles can be widely used in various fields, such as high-efficiency catalysts, conductive pastes, high-conductivity, high-specific-strength alloys and solid lubricants, etc. At present, there are many methods for preparing nano-copper, such as gas phase evaporation method, plasma method, γ-ray irradiation-hydrothermal crystallization combined method, mechanochemical method, ultrasonic chemical method, electron beam irradiation method, photocatalytic decomposition method, electrolytic method, sol A gel method, reverse microemulsion method, microwave irradiation synthesis method, supercritical extraction method, thermal decomposition method, etc. Some of these preparation methods have h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 杨仕平金磊
Owner SHANGHAI NORMAL UNIVERSITY