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A preparation method of leaf-shaped porous copper nanosheets

A technology of nanosheets and porous copper, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc. It can solve problems such as unfavorable performance of flexible electronic products, inconvenient cleaning and purification of copper nanosheets, and increased circuit resistance. , to achieve the effect of good contact, good dispersion and resource saving

Active Publication Date: 2022-02-08
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of copper nanosheets by the existing liquid phase reduction method generally requires the addition of a large amount of organic solvents, long-chain surfactants, or soft and hard templates, which brings great inconvenience to the cleaning and purification of copper nanosheets.
When copper nanosheets attached by organic matter are used as conductive fillers in printed circuits, it will inevitably lead to increased circuit resistance, which is not conducive to the improvement of the performance of flexible electronic products.

Method used

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  • A preparation method of leaf-shaped porous copper nanosheets
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Embodiment 1

[0033] This embodiment includes the following steps:

[0034] Step 1, polyethylene glycol and copper chloride are dissolved in deionized water to obtain a mixed solution; the mass concentration of polyethylene glycol in the mixed solution is 1g / L, and the mass concentration of copper chloride is 1g / L, so The polyethylene glycol is polyethylene glycol 8000; the volume of the mixed solution is 0.5L;

[0035] Step 2, add ammoniacal liquor to the mixed solution obtained in step 1, then stir to obtain a copper-ammonia complex solution; the volume of the added ammoniacal liquor is 0.5mL, and the substance concentration of the ammoniacal liquor is 2mol / L, so The time of stirring is 0.5h;

[0036] Step 3, heating the copper-ammonia complex solution obtained in step 2 in a water bath under stirring conditions, and then adding sodium hydroxide solution dropwise to the copper-ammonia complex solution for reaction to obtain copper oxide nanosheets; the water bath The heating temperature...

Embodiment 2

[0042] This embodiment includes the following steps:

[0043] Step 1, polyethylene glycol and copper chloride are dissolved in deionized water to obtain a mixed solution; the mass concentration of polyethylene glycol in the mixed solution is 4g / L, and the mass concentration of copper chloride is 5g / L, so The polyethylene glycol is polyethylene glycol 8000; the volume of the mixed solution is 1L;

[0044] Step 2, add ammoniacal liquor to the mixed solution obtained in step 1, then stir to obtain a copper-ammonia complex solution; the volume of the added ammoniacal liquor is 1mL, and the substance concentration of the ammoniacal liquor is 2mol / L. The stirring time is 0.6h;

[0045] Step 3, heating the copper-ammonia complex solution obtained in step 2 in a water bath under stirring conditions, and then adding sodium hydroxide solution dropwise to the copper-ammonia complex solution for reaction to obtain copper oxide nanosheets; the water bath The heating temperature is 95°C, ...

Embodiment 3

[0049] This embodiment includes the following steps:

[0050] Step 1, polyethylene glycol and copper chloride are dissolved in deionized water to obtain a mixed solution; the mass concentration of polyethylene glycol in the mixed solution is 1g / L, and the mass concentration of copper chloride is 0.5g / L, The polyethylene glycol is polyethylene glycol 8000; the volume of the mixed solution is 0.1L;

[0051] Step 2, add ammoniacal liquor to the mixed solution obtained in step 1, then stir to obtain a copper-ammonia complex solution; the volume of the added ammoniacal liquor is 0.1mL, and the substance concentration of the ammoniacal liquor is 2mol / L, so The time of stirring is 0.4h;

[0052] Step 3, heating the copper-ammonia complex solution obtained in step 2 in a water bath under stirring conditions, and then adding sodium hydroxide solution dropwise to the copper-ammonia complex solution for reaction to obtain copper oxide nanosheets; the water bath The heating temperature ...

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Abstract

The invention discloses a method for preparing leaf-shaped porous copper nanosheets, which comprises the following steps: 1. Dissolving polyethylene glycol and copper chloride in deionized water; 2. Adding ammonia water to the mixed solution; 3. Adding copper ammonia The complex solution is placed in a water bath and sodium hydroxide solution is added; 4. The copper oxide nano-sheets are subjected to hydrogen thermal reduction treatment to obtain leaf-shaped porous copper nano-sheets. The present invention combines copper ions with ammonia to form a copper-ammonia complex solution, adding sodium hydroxide solution to generate copper hydroxide nanowires, which are oxidized in a water bath to form copper oxide, and form copper oxide nanosheets under the adsorption of ammonia. Thermal reduction treatment is used to obtain porous leaf-shaped copper nanosheets without changing the sheet shape. The obtained leaf-shaped porous copper nanosheets have a small thickness and a large sheet diameter, and have good dispersion and particle size. The advantages of uniformity and high cleanliness can be used as nano-metal conductive fillers for flexible printed circuits.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing leaf-shaped porous copper nanosheets. Background technique [0002] The vigorous development of flexible electronic technology has higher and higher requirements for conductive fillers for flexible printed circuits, which not only require excellent conductivity, but also require lower cost. Copper is a metal material with large reserves, low price and excellent electrical conductivity. It is an important development direction for metal conductive fillers to prepare it into nanomaterials. [0003] Due to the huge difference in shape and size, copper nanomaterials can be divided into nanoparticles, nanowires, and nanosheets. At present, copper nanoparticles with simple preparation technology have been industrialized, while copper nanowires and copper nanosheets with relatively complex preparation technology are difficult to indus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/22B22F1/054B82Y30/00B82Y40/00C01G3/02
CPCB22F9/22B82Y30/00B82Y40/00C01G3/02B22F2301/10B22F1/0551B22F1/068B22F1/07B22F1/054
Inventor 戎万党蕊孟晗琪杨阳
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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