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A kind of method for rapidly preparing nano silver wire

A nano-silver wire, fast technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of slow heating and cooling speed of the reaction system, uneven wire diameter, and many nanorods and nanoparticles and other problems, to achieve the effect of reducing reaction time, simple method, and reducing reunion

Active Publication Date: 2022-07-01
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN 201410203569.8 discloses a method of preparing nano-silver wires of different lengths by simply adjusting the molecular weight and reaction temperature of PVP by using a simple salt-assisted polyol method; patent CN 201610804238.9 discloses a trace salt-assisted polyol method However, due to the slow heating and cooling speed of the reaction system in the above method, there are many nanorods and nanoparticles in the synthesized silver nanowire stock solution, the wire diameter is uneven, and there is a large amount of agglomeration.

Method used

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  • A kind of method for rapidly preparing nano silver wire
  • A kind of method for rapidly preparing nano silver wire
  • A kind of method for rapidly preparing nano silver wire

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1 Preparation of silver nanowires with a length of 40 μm

[0034] (1) Preparation of ethylene glycol solution of PVP: Weigh 1.4650 g of PVP with an average molecular weight of 58,000, dissolve it in 80 mL of ethylene glycol solution, and stir and dissolve on a hot plate at 120°C;

[0035] (2) Preparation of polyol mixed solution of silver salt and chloride: weigh 1.200g AgNO 3 and 0.040g KCl, dissolve it in 60mL ethylene glycol solution, and ultrasonicate it in an ultrasonic cleaner for 10min to fully dissolve it;

[0036](3) Preparation of nano-silver wires: transfer the solution obtained in step (1) to a heating reactor, stir and heat at a stirring rate of 200 rpm, and stabilize to 150 ° C, and then dropwise add step (2) to prepare The solution, the dropping time was controlled at 15min; after the dropping was completed, the temperature of the system dropped by 10-15°C, the heating rate was controlled, the reaction system was raised to 150°C within 2min, the ...

Embodiment 2

[0037] Example 2 Preparation of nano silver wires with a length of 60 μm

[0038] (1) Preparation of ethylene glycol solution of PVP: Weigh 1.4650 g of PVP with an average molecular weight of 58,000, dissolve it in 80 mL of ethylene glycol solution, and stir and dissolve on a hot plate at 120°C;

[0039] (2) Preparation of polyol mixed solution of silver salt and chloride: weigh 1.200g AgNO 3 and 0.008g KCl, dissolve it in 60mL ethylene glycol solution, and sonicate it in an ultrasonic cleaner for 10min to fully dissolve it;

[0040] (3) Preparation of nano-silver wires: transfer the solution obtained in step (1) to a heating reactor, stir and heat at a stirring rate of 220 rpm, and stabilize to 160° C., and then dropwise add step (2) to prepare the solution, the dripping time was controlled at 15min; after the dripping was completed, the temperature of the system dropped by 10-15°C, the heating rate was controlled to make the reaction system rise to 160°C within 2min, the st...

Embodiment 3

[0041] Example 3 Preparation of nano-silver wires with a length of 80 μm

[0042] (1) Preparation of ethylene glycol solution of PVP: Weigh 1.4650 g of PVP with an average molecular weight of 58,000, dissolve it in 80 mL of ethylene glycol solution, and stir and dissolve on a hot plate at 120°C;

[0043] (2) Preparation of polyol mixed solution of silver salt and chloride: weigh 1.200g AgNO 3 and 0.0004g KCl, dissolve it in 60mL ethylene glycol solution, and ultrasonicate it in an ultrasonic cleaner for 10min to fully dissolve it;

[0044] (3) Transfer the solution prepared in step (1) to the heating reactor, stir and heat, and the stirring rate is 200 rpm, and stabilize to 170 ° C, and then dropwise add the solution prepared in step (2), adding time Control at 15min; after the dropwise addition, the temperature of the system drops by 10-15°C, control the heating rate, make the reaction system rise to 170°C within 2min, adjust the stirring rate to 100rpm, react for 3min, and ...

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Abstract

The invention discloses a method for rapidly preparing nano-silver wires, comprising the following steps: S1. adding a polyvinylpyrrolidone solution of polyvinylpyrrolidone into a reaction vessel, and after fully heating and stirring, dropwise adding silver salt and a polyol of chloride Mix the solution, stop stirring after the dropwise addition is completed, heat up to 150-170 ° C in 1-3 min, and react at this temperature for 3-5 min; S2. The nano-silver wire stock solution obtained in step S1 is rapidly cooled to room temperature in 6 min, Then, the nano-silver wire stock solution is dispersed in ethanol, and the supernatant is removed by centrifugation to obtain nano-silver wires with a length of 40-80 μm. The method of the invention can rapidly synthesize nano silver wires with a length of 40-80 μm, and the obtained nano silver wires have uniform wire diameter and few particles, and are easy to operate, have good stability, good repeatability and high yield, and are suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, and more particularly, to a method for rapidly preparing silver nanowires. Background technique [0002] At present, there are many methods to prepare silver nanowires, which can be divided into physical methods and chemical methods. Physical methods such as template methods require template assistance to complete the synthesis of silver nanowires. The template-based synthesis of silver nanowires can be carried out by chemically oriented growth (metal crystal site growth) or by physical methods to control the deposition of metals in specific geometries. There are two main types of template methods: one is the hard template method and the other is the soft template method. The templates used in the hard template method mainly include carbon nanotubes, mesoporous silica, anodized alumina, etc.; the soft templates mainly include deoxyribonucleotides (DNA) and ionic liquids. The template met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/054B82Y40/00B82Y30/00
CPCB22F9/24B82Y40/00B82Y30/00B22F1/0547
Inventor 申玉求周勇陈振兴雷作敏刘意林思远
Owner SUN YAT SEN UNIV