Preparation method of antioxidant copper nanowires

A copper nanowire, anti-oxidation technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as limited applications, achieve low and constant contact resistance, prevent oxidation, and simple operation Effect

Active Publication Date: 2017-12-15
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrophobicity of these organic molecules limits their application in aqueous systems

Method used

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  • Preparation method of antioxidant copper nanowires
  • Preparation method of antioxidant copper nanowires
  • Preparation method of antioxidant copper nanowires

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Step 1: Prepare copper nanowires with a diameter of 50-200nm: first weigh 1.7g CuCl 2 2H 2 O (~10mmol) and 1.93g glucose (~10mmol) were dissolved in 200mL deionized water and stirred evenly, then the mixed solution consisting of 20mL oleylamine, 0.2mL oleic acid and 35mL ethanol was slowly added to CuCl 2 2H 2 O and glucose mixed in aqueous solution, and then diluted to 1000mL. The above mixed solution was pre-reacted in an oil bath at 50°C for 12 hours. After the reaction, it was transferred to a hydrothermal reactor and reacted at 120°C for 6 hours. Finally, a red precipitate appeared at the bottom of the reactor, which was copper nanowires. Dissolve the copper nanowires in an ethanol solution (2.0 wt%) containing polyvinylpyrrolidone for ultrasonic dispersion until uniformly dispersed, centrifuge at 6000 rpm for 5 min, collect the precipitate and disperse the precipitate in absolute ethanol by ultrasonic, and then centrifuge for two to remove excess polyvinylpyrro...

Embodiment 2

[0035] Preparation of copper nanowires with a diameter of 20nm: Weigh 0.5mmol of copper chloride and ultrasonically disperse it in 5mL of oleylamine, slowly raise the temperature to 70°C under the protective gas of nitrogen, add 0.424g of benzoin under the condition of stirring, and in a nitrogen atmosphere Heating to 120°C while stirring in the medium, stabilizing at this temperature for 30min, removing the nitrogen, heating to 185°C in a closed environment, and keeping at this temperature for 3h, the ultra-fine copper nanowires with a diameter of 20nm can be obtained. The copper nanowires were washed with hot ethanol and n-hexane several times to remove free organic matter, and finally the filter cake was dried in a drying oven for later use. Figure 5 It is a TEM picture of the prepared 20nm copper nanowire, which shows that the copper nanowire has good flexibility, with a diameter of 10-30nm and a length of about 10 μm.

[0036] Weigh 50 mg of copper nanowires, wash the or...

Embodiment 3

[0039] Weigh 200 mg of copper nanowires with a diameter of 50-200 nm, wash the organic matter on the surface with hot anhydrous ethanol for 10 minutes, then rinse with deionized water to remove the surface ethanol, and disperse the copper nanowires in 0.05M dilute sulfuric acid for 20 minutes Remove the oxide layer on the surface, then ultrasonically clean it with ultrapure water for 10 minutes, and dry it for later use. Place the copper nanowires in a high-temperature and high-pressure container containing 500 mg of magnesium formate and 10 mL of ethylene glycol solution for ultrasonication for 5 minutes, then raise the temperature from room temperature to 150°C within 30 minutes, then keep it at 150°C for 15 hours, cool naturally, and use ultrapure water After washing with absolute ethanol for several times, formate-modified anti-oxidation copper nanowires can be obtained.

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Abstract

The invention provides a preparation method of antioxidant copper nanowires, and relates to the preparation method of metal nanowires. The preparation method is simple and low in cost, formic acid roots are modified or adsorbed on the surfaces of the copper nanowires, the stability of the copper nanowires is improved, and meanwhile, the electrical conductivity is not reduced. The preparation method comprises the following steps that the copper nanowires are added to dispersing agents, polar organic solvents and / or water are added then, and copper nanowire dispersing liquid is obtained by mixing; antioxidants are added to the obtained copper nanowire dispersing liquid to mix, and mixed liquid is obtained; the mixed liquid is put in a pressurized and heated sealing system to react; and the mixed liquid is subjected to liquid-solid separation after being cooled, and the copper nanowires subjected to antioxidant surface treatment, namely the antioxidant copper nanowires, are obtained after washing.

Description

technical field [0001] The invention relates to a preparation method of metal nanowires, in particular to a preparation method of an oxidation-resistant copper nanowire suitable for transparent conductive films, sensing and catalysis. Background technique [0002] In recent years, transparent conductive films have been widely used in various electronic devices such as light-emitting diodes, touch screens, and liquid crystal displays. Transparent conductive film is a film that can conduct electricity and has high transmittance in the visible light range. The most commonly used indium tin oxide (ITO) as a transparent conductor has a high degree of transparency and good conductivity to electrons, but its shortcomings such as brittleness and rarity have prompted people to continuously search for more economical materials. [0003] Metal nanowires are the most promising materials to replace ITO glass, especially in flexible and bendable electronic devices, mainly because of thei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00H01B1/02B82Y40/00B82Y30/00
CPCH01B1/02B82Y30/00B82Y40/00B22F1/0547B22F1/07B22F1/102
Inventor 郑南峰彭健吴炳辉方晓亮符昂
Owner XIAMEN UNIV
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