Preparation method of ultralong silver nanowires

A silver nanowire, ultra-long technology, applied in the nano field, can solve the problems of increasing the difficulty of production control, increasing production costs, technical difficulties, etc., and achieving the effects of excellent optoelectronic properties, easy operation and low temperature

Active Publication Date: 2017-03-29
CHANGZHOU HUAWEI ADVANCED MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of inert gas will increase the production cost and increase the difficulty of production control
At present, the synthesis of ultra-long silver nanowires with a length of more than 90 μm is still a technical difficulty

Method used

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  • Preparation method of ultralong silver nanowires
  • Preparation method of ultralong silver nanowires
  • Preparation method of ultralong silver nanowires

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Experimental program
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Effect test

Embodiment 1

[0023] The preparation method of the ultralong silver nanowire of embodiment 1, comprises the following steps:

[0024] (1) preparation molar concentration is the ethylene glycol solution of the dodecyltrimethylammonium chloride of 600 μ mol / L, stand-by;

[0025] (2) Prepare FeCl with a molar concentration of 600 μmol / L 3 Ethylene glycol solution, stand-by;

[0026] (3) Add 0.3 g of polyvinylpyrrolidone with an average molecular weight of 360,000 and 58,000 to 100 mL of ethylene glycol, stir well until completely dissolved, and prepare a mixed polyvinylpyrrolidone glycol solution with a total mass concentration of 0.006 g / mL ,stand-by;

[0027] (4) 0.7g silver nitrate is added in the mixed polyvinylpyrrolidone ethylene glycol solution of preparation, obtain mixed solution after fully stirring;

[0028] (5) The prepared 1mL of dodecyltrimethylammonium chloride ethylene glycol solution and 9mL of FeCl 3 Add the ethylene glycol solution in the mixed solution that obtains in s...

Embodiment 2

[0030] The preparation method of the ultralong silver nanowire of embodiment 2, comprises the following steps:

[0031] (1) preparation molar concentration is the ethylene glycol solution of the dodecyltrimethylammonium chloride of 600 μ mol / L, stand-by;

[0032] (2) Prepare FeCl with a molar concentration of 600 μmol / L 3 Ethylene glycol solution, stand-by;

[0033] (3) Add 0.3 g of polyvinylpyrrolidone with an average molecular weight of 360,000 and 58,000 to 100 mL of ethylene glycol, stir well until completely dissolved, and prepare a mixed polyvinylpyrrolidone glycol solution with a total mass concentration of 0.006 g / mL ,stand-by;

[0034] (4) 0.7g silver nitrate is added in the mixed polyvinylpyrrolidone ethylene glycol solution of preparation, obtain mixed solution after fully stirring;

[0035] (5) The prepared 2mL of dodecyltrimethylammonium chloride ethylene glycol solution and 8mL of FeCl 3 Add the ethylene glycol solution in the mixed solution that obtains in s...

Embodiment 3

[0037] The preparation method of the ultralong silver nanowire of embodiment 3, comprises the following steps:

[0038] (1) preparation molar concentration is the ethylene glycol solution of the dodecyltrimethylammonium chloride of 600 μ mol / L, stand-by;

[0039] (2) Prepare FeCl with a molar concentration of 600 μmol / L 3 Ethylene glycol solution, stand-by;

[0040] (3) Add 0.4 g of polyvinylpyrrolidone with an average molecular weight of 360,000 and 58,000 to 100 mL of ethylene glycol, stir well until completely dissolved, and prepare a mixed polyvinylpyrrolidone glycol solution with a total mass concentration of 0.008 g / mL ,stand-by;

[0041] (4) 0.7g silver nitrate is added in the mixed polyvinylpyrrolidone ethylene glycol solution of preparation, obtain mixed solution after fully stirring;

[0042] (5) The prepared 3mL of dodecyltrimethylammonium chloride ethylene glycol solution and 7mL of FeCl 3 Add the ethylene glycol solution in the mixed solution obtained in step ...

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Abstract

The invention discloses a preparation method of ultralong silver nanowires. The preparation method is characterized in that dodecyl trimethyl ammonium chloride and FeCl3 are introduced into a reaction system, and the shape and the size of a silver chloride crystal nucleus are controlled, so as to guide the one-dimensional growth of the ultralong silver nanowires. The preparation method is simple in preparation devices, few in steps, low in temperature, and simple and convenient to operate; the whole preparation process is carried out under normal pressure and atmosphere environment; the ultralong silver nanowires of which the average length is 90-120 microns and the average diameter is 90 to 120nm can be obtained by one-step reaction; a transparent conductive film prepared based on the ultralong silver nanowires is outstanding in electrical and optical characteristics; the transmittance under the wavelength of 550nm can reach 91.3%, and the square resistance is up to 8.6 ohms per square.

Description

technical field [0001] The invention relates to the field of nanotechnology, in particular to a preparation method of ultra-long silver nanowires. Background technique [0002] Considering the yield, length, diameter and reaction conditions, the most suitable method for large-scale synthesis of silver nanowires is the polyol method. This method uses PVP (typically 55,000 weight average molecular weight) as a capping agent to reduce Ag in hot ethylene glycol (EG) + . Generally speaking, the EG is preheated to about 160°C, and then the silver precursor (usually AgNO 3 ) and the EG solution of PVP, continue to react to complete at this temperature. Generally, the synthesized silver nanowires have a length of 2-25 μm, a width of 40-00 nm, and an aspect ratio of 50-300. [0003] The prerequisite for the nanowire conductive network made of silver nanowires (AgNWs) to conduct electricity is that the nanowires must be connected to each other. Because the PVP coated on the surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0547
Inventor 宋伟杰徐峰许炜沈文锋
Owner CHANGZHOU HUAWEI ADVANCED MATERIAL
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