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High-purity silver nanowire and preparation method thereof, and silver nanowire conductive film

A silver nanowire, high-purity technology, applied in the field of nanomaterials, can solve the problems of silver nanowire purification difficulties, and achieve the effects of reducing atmospheric environmental pollution, high purity, and narrow diameter distribution range

Pending Publication Date: 2020-04-17
海泰纳鑫科技(成都)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing high-purity silver nanowires in view of the defect that silver nanowires are difficult to purify in the prior art. The preparation method combines the synthesized silver nanowire synthesis liquid through high-speed centrifugation and step-by-step filtration The method of separation and purification is simple, efficient, safe and environmentally friendly, and the silver nanowires obtained from the separation are of high purity and easy to disperse.

Method used

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  • High-purity silver nanowire and preparation method thereof, and silver nanowire conductive film
  • High-purity silver nanowire and preparation method thereof, and silver nanowire conductive film
  • High-purity silver nanowire and preparation method thereof, and silver nanowire conductive film

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Embodiment 1

[0042] A preparation method for high-purity silver nanowires, comprising the following steps:

[0043] Step 1: Prepare the silver nanowire synthesis solution to be separated and purified

[0044] Measure 90ml of ethylene glycol with a measuring cylinder, add 0.38ml 0.01g / ml potassium bromide solution, 0.45ml 0.01g / ml potassium chloride solution, 0.25ml 0.01g / ml ferric chloride hexahydrate solution and 1.5g poly Vinylpyrrolidone, then start heating and stirring, reach 160°C and keep warm for 30min, then quickly add 10ml 0.1g / ml AgNO 3 solution, stop heating after reacting for 5 hours, and naturally cool to room temperature to obtain a silver nanowire synthesis liquid, the silver nanowire concentration is about 0.009g / ml. The above potassium bromide solution, potassium chloride solution, ferric chloride hexahydrate solution and AgNO 3 The solvent in the solution is ethylene glycol.

[0045] Step 2: Mix the silver nanowire synthesis solution obtained in step 1 with water at a ...

Embodiment 2

[0056] A preparation method of high-purity silver nanowires, comprising the following steps:

[0057] Step 1: Prepare the silver nanowire synthesis solution to be separated and purified

[0058] Measure 90ml of ethylene glycol with a graduated cylinder, add 0.38ml 0.01g / ml potassium bromide, 0.45ml 0.01g / ml potassium chloride, 0.25ml 0.01g / ml ferric chloride hexahydrate, 1.5g polyvinylpyrrolidone, Then start heating and stirring, reach 160°C and keep it warm for 30min, then quickly add 10ml 0.1g / ml AgNO 3 solution, stop heating after reacting for 5 hours, and naturally cool to room temperature to obtain a silver nanowire synthesis liquid, the silver nanowire concentration is about 0.009g / ml. The solvent used in the above solutions is ethylene glycol.

[0059] Step 2: The silver nanowire synthesis solution obtained in step 1 and ethanol are mixed at a volume ratio of 1:7, stirred at a speed of 400 rpm / min for 0.5 h, and then centrifuged at a centrifugal speed of 4500 rpm for ...

Embodiment 3

[0065] A preparation method of high-purity silver nanowires, comprising the following steps:

[0066] Step 1: Prepare the silver nanowire synthesis solution to be separated and purified:

[0067] Measure 90ml of ethylene glycol with a measuring cylinder, add 1.52ml 0.01g / ml potassium bromide, 0.45ml 0.01g / ml potassium chloride, 0.25ml 0.01g / ml ferric chloride hexahydrate, 1.5g polyvinylpyrrolidone, Then start heating and stirring, reach 160°C and keep it warm for 30min, then quickly add 10ml 0.1g / ml AgNO 3 solution, stop heating after reacting for 5 hours, and naturally cool to room temperature to obtain a silver nanowire synthesis liquid, the silver nanowire concentration is about 0.009g / ml. The solvent used in the above solutions is ethylene glycol.

[0068] Step 2: The silver nanowire synthesis solution obtained in step 1 and the mixed solvent (water:ethanol mixing volume ratio 1:1) were stirred at a speed of 1000 rpm / min for 5 h at a volume ratio of 1:4, and then centrif...

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Abstract

The invention discloses a preparation method of a high-purity silver nanowire. The method comprises steps of step 1, preparing silver nanowire synthetic liquid; 2, uniformly stirring the obtained silver nanowire synthetic liquid and solvent, and centrifuging to obtain silver nanowire precipitate; and 3, uniformly stirring the obtained silver nanowire precipitate and the dispersion solution, and separating and purifying through a multi-stage filtering device to obtain the silver nanowire. The method is advantaged in that high-speed centrifugation and step-by-step filtration are combined, the separation process is simple, efficient, safe and environmentally friendly, the silver nanowires obtained through separation are high in purity, narrow in diameter distribution range, good in dispersityand not prone to agglomeration, and a coated silver nanowire conductive film has advantages of high light transmittance, low haze, low sheet resistance and the like.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a high-purity silver nanowire, a preparation method thereof, and a silver nanowire conductive film. Background technique [0002] Flexible transparent conductive films are important components of many electronic and optoelectronic devices, such as display screens, electronic skins, and solar cells. In recent years, with the widespread popularization of touch electronic products and the increasing requirements for touch screen technology, people's demand and requirements for transparent conductive films are getting higher and higher. [0003] Due to the shortage of resources, poor flexibility, high refractive index, complex manufacturing process, and high energy consumption, the traditional indium tin oxide (ITO) material can no longer meet the development requirements of the new generation of touch technology. It is particularly necessary to find new alternative mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B01D36/00B05D5/12B05D7/24B82Y40/00B82Y30/00
CPCB22F9/24B01D36/00B05D5/12B05D7/24B82Y40/00B82Y30/00B22F1/0547B22F1/147B22F1/145
Inventor 曹国俊杨宁宁王成
Owner 海泰纳鑫科技(成都)有限公司
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