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Preparation method of silver nanowire with high aspect ratio and silver nanowire prepared by the method

A silver nanowire, high aspect ratio technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of low nanowire yield, high nanowire cost, and difficulty in mass production and other problems to achieve the effect of high aspect ratio

Inactive Publication Date: 2017-04-05
海泰纳鑫科技(成都)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the nanowires are grown in the template, the size of the nanowires is strictly controlled by the size of the template, so if you want to prepare nanowires with a high aspect ratio, you must first prepare templates of different sizes, which leads to the excessive cost of preparing nanowires. High; in addition, the output of nanowires prepared by template method is too low, it is difficult to adapt to large-scale industrial production

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  • Preparation method of silver nanowire with high aspect ratio and silver nanowire prepared by the method
  • Preparation method of silver nanowire with high aspect ratio and silver nanowire prepared by the method
  • Preparation method of silver nanowire with high aspect ratio and silver nanowire prepared by the method

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preparation example Construction

[0022] The preparation method of silver nanowires with high aspect ratio of the present invention comprises the following steps: (a) dissolving polyvinylpyrrolidone and halogenated imidazole ionic liquids in ethylene glycol to obtain a first mixed solution, said polyvinylpyrrolidone and The mass ratio of the imidazole halide ionic liquid is 1:0.2~1; (b) dissolving silver nitrate in ethylene glycol to obtain a silver nitrate ethylene glycol solution; (c) dissolving the silver nitrate ethylene glycol solution Stirring and mixing with the first mixed solution, reacting at a temperature lower than the boiling point of ethylene glycol for 1 to 10 hours to obtain a bright white mixed solution, the mass ratio of the polyvinylpyrrolidone to the silver nitrate is 1 to 5:1; (d) After the bright white mixed solution is left to stand, pour off the upper layer to clear the night, or filter the bright white mixed solution; then use a low boiling point organic solvent to rinse the silver nano...

Embodiment 1

[0025] The present embodiment provides a kind of preparation method of high aspect ratio silver nanowire, it comprises the following steps:

[0026] (a) Take 0.1g polyvinylpyrrolidone (PVP, K value is 25), 0.02g 1-ethyl-3-methylimidazole chloride and dissolve in 20ml ethylene glycol to obtain the first mixed solution;

[0027] (b) get 0.5 silver nitrate and be dissolved in 20ml ethylene glycol, obtain silver nitrate ethylene glycol solution;

[0028] (c) Stir and mix the silver nitrate ethylene glycol solution and the first mixed solution and react at 100° C. for 10 h to obtain a bright white mixed solution;

[0029] (d) After the bright white mixed solution is left to stand, pour off the upper clear night, and then use ethanol to rinse the silver nanowires obtained after solid-liquid separation. The scanning electron microscope picture is as follows figure 1 As shown, the wire diameter is about 50nm, the length is about 200 microns, and the aspect ratio exceeds 4000.

Embodiment 2

[0031] The present embodiment provides a kind of preparation method of high aspect ratio silver nanowire, it comprises the following steps:

[0032] (a) Dissolve 0.2g vinylpyrrolidone (PVP, K value: 50) and 0.2g 1-methyl-3-methylimidazole chloride in 20ml ethylene glycol to obtain the first mixed solution;

[0033] (b) get 0.2g silver nitrate and be dissolved in 20ml ethylene glycol, obtain silver nitrate ethylene glycol solution;

[0034] (c) Stir and mix the silver nitrate ethylene glycol solution and the first mixed solution, then react at 180° C. for 1 h to obtain a bright white mixed solution;

[0035] (d) filtering the bright white mixed solution, and then washing the silver nanowires obtained after solid-liquid separation with methanol;

[0036] (e) Disperse the rinsed silver nanowires in water to form a dispersion of silver nanowires, and its scanning electron micrograph is as follows figure 2 shown.

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Abstract

The invention relates to a high-length-diameter-ratio silver nanowire preparation method and a silver nanowire prepared by the same. The preparation method includes the steps of (a), dissolving polyvinylpyrrolidone and halogenated imidazolium ionic liquid into ethylene glycol to obtain a first mixed solution; (b), dissolving silver nitrate into the ethylene glycol to obtain a silver nitrate-ethylene glycol solution; (c), mixing the silver nitrate-ethylene glycol solution with the first mixed solution to react for 1-10 hours at the temperature lower than the boiling point of the ethylene glycol so as to obtain a bright white mixed solution; (d), using low-boiling-point organic solvents for flushing the silver nanowire obtained after solid-liquid separation. The high-length-diameter-ratio silver nanowire preparation method has the advantages that the halogenated imidazolium ionic liquid is added into a polyvinylpyrrolidone and ethylene glycol mixed solution to form the first mixed solution, the halogenated imidazolium ionic liquid and the silver nitrate can form silver chloride precipitation, and imidazolium cations can be beneficial to dispersion and unidirectional growth of silver nanoparticles, so that the high length-diameter ratio of the silver nanowire can be achieved.

Description

technical field [0001] The invention belongs to the field of metal nanomaterials, and relates to a method for preparing silver nanowires, in particular to a method for preparing silver nanowires with high aspect ratio and silver nanowires prepared by the method. Background technique [0002] Compared with traditional ITO, transparent electrodes based on silver nanowires have comparable electrical conductivity and light transmittance, better flexibility, and more abundant resources. Due to the nanoscale size effect, it also has excellent light transmission and flex resistance. Therefore, it is considered to be the most likely material to replace the traditional ITO transparent electrode, which provides the possibility to realize flexible and bendable LED displays, touch screens, etc., and a large number of studies have applied it to thin-film solar cells; in addition, because silver nano The large aspect ratio effect of the wire also has outstanding advantages in the applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y30/00B82Y40/00
Inventor 严锋
Owner 海泰纳鑫科技(成都)有限公司