Copper nanowire and preparation method thereof

A nano-copper wire, copper salt technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor uniformity of nano-metal wires, damage to conductivity and structure, and high cost of synthesis methods , to achieve the effect of simple equipment, low cost, good dispersibility and oxidation resistance

Active Publication Date: 2014-03-26
GUANGDONG TONESET SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In contrast, the conductivity and structure of ITO films break down after a few bends
The first mobile phone with a screen made of silver nanowires will hit the market in 2013, but silver, like indium, is still expensive, at $1,400 per kilogram
Some of these methods need to add toxic organic shape inducers (organic substances of ethylenediamine or diethylenetriamine, etc.), and the uniformity of nano metal wires is poor, the purity is low, and the cost of the synthesis method is high. quite complicated

Method used

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  • Copper nanowire and preparation method thereof
  • Copper nanowire and preparation method thereof
  • Copper nanowire and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0038] The preparation method of nano copper wire of the present embodiment comprises the following steps:

[0039] (1) Take 0.5L 1mol / L calcium hydroxide solution in the reactor, start the magnetic stirrer and ultrasonic generator, heat to 50°C, add 20μL 0.01mol / L copper acetate solution and stir evenly;

[0040] (2) Take 200mL of 0.005mol / L potassium borohydride solution and 1×10 -3 mol / L polyvinylpyrrolidone solution 25mL is mixed evenly, then added to the solution obtained in step (1) and stirred evenly;

[0041] (3) Add 1L of 0.01mol / L copper acetate solution at a rate of 2.0mL / min and keep reacting for 0.5 hours at a reaction temperature of 50°C;

[0042] (4) The product obtained in step (3) is centrifuged and washed with absolute ethanol and distilled water to obtain the nano copper wire.

[0043] The above product was analyzed by X-ray diffraction (XRD, such as figure 1 shown) and EDS (as Figure 8 Shown) analysis is pure copper; SEM observes the morphology and str...

Embodiment 2

[0045] The preparation method of nano copper wire of the present embodiment comprises the following steps:

[0046] (1) Take 0.2L 5mol / L sodium hydroxide solution in the reactor, start the magnetic stirrer and ultrasonic generator, heat to 40°C, add 40μL 0.0005mol / L copper sulfate solution and stir evenly;

[0047] (2) Take 10mL of 0.005mol / L sodium borohydride solution and 1×10 -3 mol / LC 13 ~C16 Mix 20mL sodium alkyl sulfonate solution evenly, add it to the solution obtained in step (1), and stir evenly;

[0048] (3) Add 1L of 0.05mol / L copper sulfate solution at a rate of 0.4mL / min and keep reacting for 2 hours at a reaction temperature of 40°C;

[0049] (4) Centrifuge the reaction product obtained in step (3), wash it with absolute ethanol and distilled water to obtain the copper nanowire of this embodiment.

[0050] The X-ray diffraction analysis (XRD) figure is similar to that of Example 1; the morphology and structure of the nano-copper wires obtained in this example ...

Embodiment 3

[0052] The preparation method of nano copper wire of the present embodiment comprises the following steps:

[0053] (1) Take 0.1L 8mol / L potassium hydroxide solution in the reactor, start the magnetic stirrer and ultrasonic device, and heat to 70°C, add 60μL 0.01mol / L copper nitrate solution and stir evenly;

[0054] (2) Take 300mL of 0.015mol / L glucose solution and 1×10 -4 mol / L sodium lauryl sulfate 15mL is mixed evenly, then added to the solution obtained in step (1), and stirred evenly;

[0055] (3) Add 1L of 0.01mol / L copper nitrate solution at a rate of 1.2mL / min and keep reacting for 3 hours at a reaction temperature of 70°C;

[0056] (4) Centrifuge the product obtained in step (3), wash it with absolute ethanol and distilled water to obtain the nano copper wire of this example.

[0057] The X-ray diffraction analysis (XRD) figure is similar to that of Example 1; the morphology and structure of the nano-copper wires obtained in this example are observed by SEM, as F...

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Abstract

The invention discloses a copper nanowire and a preparation method of the copper nanowire. The method comprises the steps that (1) a copper salt solution is added into an alkali solution, the two solutions are mixed, and the concentration of copper ions in the mixed solution ranges from 1*10<-7>mol/L to 1*10<-5>mol/L; (2) a mixed solution of a reducing agent and a dispersing agent is prepared and added into the mixed solution obtained in the step (1); (3) the copper salt solution is dropwise added into the solution obtained in the step (2) under the conditions of magnetic stirring or ultrasonic dispersing, and reaction is conducted for 0.5-6 hours at the temperature of 40-90 DEG C; (4) products obtained in the step (3) are centrifugally separated and washed, and then the copper nanowire is obtained. The copper nanowire obtained based on the preparation method has the good dispersity and inoxidizability, the particle sizes of the obtained products are uniform, the length of the prepared copper nanowire ranges from 3 micrometers to 15 micrometers, the diameter of the prepared copper nanowire ranges from 20nm to 100nm, and the maximum square resistance value can reach 10.1 ohm per square.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a nanocopper wire and a preparation method thereof. Background technique [0002] At present, the film of the electronic product screen is made of indium tin oxide (ITO), which has a high degree of transparency and has good conductivity for information. But the ITO film must be deposited by vapor, which is a very slow process, and devices containing ITO are easy to crack. In addition, indium is also an expensive rare earth element, and the price per kilogram is as high as about 800 US dollars. These problems have prompted scientists around the world to try their best to find more economical materials, and to find low-cost transparent conductive films that can be plated or printed on the surface of the required materials more quickly. One of the alternatives to ITO films is to use cheap metal conductive nanowire inks, especially transparent conductive films prepared f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00
Inventor 张念椿刘彬云郑臣谋王植材肖定军
Owner GUANGDONG TONESET SCI & TECH
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