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Method for massively preparing overlength copper nanowires

A copper nanowire, ultra-long technology, applied in nanotechnology and other directions, can solve the problem of difficult to achieve large-scale production of high-temperature pressure vessels, and achieve the effects of a wide range of size control, controllable morphology, and uniform morphology

Active Publication Date: 2012-07-25
珠海纳金科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese patent ZL 200410070765.7 discloses a solution-phase synthesis method. Copper nanowires with a large aspect ratio are synthesized in a closed reactor. The outstanding advantage of this method is that the reaction is simple, but it is difficult to achieve large-scale production using high-temperature pressure vessels. Production

Method used

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  • Method for massively preparing overlength copper nanowires
  • Method for massively preparing overlength copper nanowires
  • Method for massively preparing overlength copper nanowires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First prepare 100 ml of mixed solvent of ethylene glycol, dimethylformamide and water according to the volume ratio of 1:1:3; take 0.3 g of copper chloride and add it to the mixed solvent by ultrasonic vibration to dissolve, then take 1 g of hexadecylamine and add Into the above solution, stirred for 20 minutes and then ultrasonically oscillated for 30 minutes to obtain a uniform emulsion, then added 0.5 grams of polyethylene glycol (average molecular weight 800) and 0.5 grams of polyvinylpyrrolidone (average molecular weight 33000), and stirred for another 20 minutes Then this mixed emulsion is transferred in 250 milliliters of round bottom flasks, is heated to boiling reflux, and continues to keep boiling reflux 3 hours, then stops heating, obtains brick red mixed solution. After the reaction stopped, wash with 100 ml each of water and ethanol and centrifuge, then wash and centrifuge with 100 ml each of n-hexane and chloroform, and finally dry the resulting precipitate...

Embodiment 2

[0034] The process is similar to that of Example 1, but when preparing copper nanowires, hexadecylamine is replaced by octadecylamine, and the amount is reduced to 0.5 g. The sonication time of the mixed solution was extended to 60 minutes, and other conditions remained unchanged. After the reaction is finished, wash and centrifuge with ethanol, ultrapure water, n-hexane and chloroform, and dry the precipitate at low temperature until it becomes a dry powder to obtain copper nanowires with a diameter of 70 nanometers. figure 2 A scanning electron microscope image of a copper nanowire with a diameter of 70 nm, by figure 2 It can be seen that the copper nanowires with a diameter of 70 nm still maintain an ultra-long axial length.

Embodiment 3

[0036] Similar to the process of Example 1, but when preparing copper nanowires, the amount of copper salt was increased to 2 grams, and then the stirring and dissolving time of the mixed solution and cetylamine was extended to 60 minutes, and the ultrasonic oscillation time was extended to 90 minutes. Other conditions remain unchanged. After the reaction is finished, wash and centrifuge with ethanol, ultrapure water, n-hexane and chloroform, and dry the precipitate at low temperature until it becomes a dry powder to obtain copper nanowires with a diameter of 120 nanometers. image 3 A scanning electron microscope image of a copper nanowire with a diameter of 120 nm, by image 3 It can be seen that while the diameter of copper nanowires increases, the axial length can be made very long, while still maintaining high purity and high monodispersity.

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Abstract

The invention relates to a method for massively preparing overlength copper nanowires. The method comprises the following steps of: using metal copper salt as a copper source; using alkyl aliphatic amine as a directing agent and a reducing agent; using polyethylene glycol and polyvinylpyrrolidone as an auxiliary agent; using mixed liquid of polyalcohol, water and dimethylformamide as a solvent; uniformly mixing several reactants and the solvent; transferring the mixture to a flask; and heating the mixture until the mixture is boiling and flowing back, and obtaining copper nanowires after a certain time. The copper nanowires have the advantages of uniform feature, high purity and good monodispersity; the cost is relatively lower, and the reversal device is simpler; the feature is controllable, and the size regulation range is wide, so that the large-scale production of the copper nanowires is realized, and the method has the industrialization prospect.

Description

technical field [0001] The invention relates to a method for preparing copper nanomaterials, in particular to a copper nanomaterial with controllable size and adjustable thickness that can be used in chemical and electrochemical catalysis, optoelectronics, optical information storage, solar cells, transparent conductive films, magnetic shielding, etc. Mass preparation method of copper nanosheets. Background technique [0002] With the widespread popularization of new-generation photovoltaic cells, intelligent lighting systems, smart phones and tablet computers, especially the large number of touch-type smart phones and tablet computers with friendly human-computer interaction interface, the key layer of transparent conductive film in the touch screen Conductivity, light transmittance, haze and other indicators put forward higher requirements. However, the development and utilization of indium tin oxide transparent conductive oxide used in traditional transparent conductive ...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 丁轶谷小虎王正元
Owner 珠海纳金科技有限公司
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