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High length-diameter ratio silver nanowire and preparation method thereof

A silver nanowire, high aspect ratio technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve silver nanoparticles and nanowire aspect ratio is not enough to meet practical application, Silver nanowires are easily doped and the yield of silver nanowires is low, so as to achieve the effects of easy mass industrial preparation, good repeatability, and inhibition of the formation of silver particles

Active Publication Date: 2019-04-12
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of silver nanowires with controllable wire diameter and wire length has always been a difficulty that limits the application of silver nanowires. The silver nanowires prepared by existing methods are easily doped with more silver nanoparticles and the aspect ratio of nanowires is not enough for practical applications.
The cost of the template method is high, the operation is complicated, and it is difficult to produce on a large scale
Moreover, after expanding the production, the two stages of seed crystal formation and linear growth interfere with each other, which is difficult to control, resulting in low yield and poor repeatability of silver nanowires

Method used

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  • High length-diameter ratio silver nanowire and preparation method thereof
  • High length-diameter ratio silver nanowire and preparation method thereof
  • High length-diameter ratio silver nanowire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Pretreatment of ethylene glycol solution: add anhydrous magnesium sulfate to the ethylene glycol solution, put it in an electronic moisture-proof cabinet and let it stand overnight, then distill under reduced pressure to obtain a dry ethylene glycol solution and place it in an electronic moisture-proof cabinet spare.

[0038] (2) Silver nitrate pretreatment: Silver nitrate is sieved with a 16-mesh stainless steel screen to remove large particles therein.

[0039] (3) Prepare the ethylene glycol solution of PVP: Weigh the powdered PVP, dissolve it in the ethylene glycol that has been pretreated in advance, put it on the heating plate and stir it to dissolve, the heating temperature is 120 °C, the concentration of the prepared solution 0.005g / mL. The molecular weight of the PVP used therein is between 55,000 and 1,300,000.

[0040] (4) Preparation of ethylene glycol solutions of A and B: weigh A and B respectively and dissolve them in ethylene glycol, put them on a ...

Embodiment 2

[0048] (1) Pretreatment of ethylene glycol solution: add anhydrous magnesium sulfate to the ethylene glycol solution, put it in an electronic moisture-proof cabinet and let it stand overnight, then distill under reduced pressure to obtain a dry ethylene glycol solution and place it in an electronic moisture-proof cabinet spare.

[0049] (2) Silver nitrate pretreatment: Silver nitrate is sieved with a 16-mesh stainless steel screen to remove large particles therein.

[0050] (3) Prepare the ethylene glycol solution of PVP: Weigh the powdered PVP, dissolve it in the ethylene glycol that has been pretreated in advance, put it on the heating plate and stir it to dissolve, the heating temperature is 120 °C, the concentration of the prepared solution It is 0.0055g / mL. The molecular weight of the PVP used therein is between 55,000 and 1,300,000.

[0051] (4) Preparation of ethylene glycol solutions of A and B: weigh A and B respectively and dissolve them in ethylene glycol, put the...

Embodiment 3

[0059] (1) Pretreatment of ethylene glycol solution: add anhydrous magnesium sulfate to the ethylene glycol solution, put it in an electronic moisture-proof cabinet and let it stand overnight, then distill under reduced pressure to obtain a dry ethylene glycol solution and place it in an electronic moisture-proof cabinet spare.

[0060] (2) Silver nitrate pretreatment: Silver nitrate is sieved with a 16-mesh stainless steel screen to remove large particles therein.

[0061] (3) Prepare the ethylene glycol solution of PVP: Weigh the powdered PVP, dissolve it in the ethylene glycol that has been pretreated in advance, put it on the heating plate and stir it to dissolve, the heating temperature is 120 °C, the concentration of the prepared solution 0.005g / mL. The molecular weight of the PVP used therein is between 55,000 and 1,300,000.

[0062] (4) Preparation of ethylene glycol solutions of A and B: weigh A and B respectively and dissolve them in ethylene glycol, put them on a ...

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Abstract

The invention provides a high length-diameter ratio silver nanowire and a preparation method thereof. The preparation method of the high length-diameter ratio silver nanowire comprises the steps thatfirstly ethylene glycol is pretreated, anhydrous magnesium sulfate is added for drying and water removing, the ethylene glycol is obtained to reserve after distilling, silver source AgNO3 is sieved through a sieve, and fine powder is obtained to used as a reaction silver source; in the reaction, by adding two alkali metal halide salts, the formation of silver particles is prohibited in the reaction, the yield is improved, the amount of PVP and the temperature gradient and rotation speed in the reaction are accurately controlled, and the wire length and the wire diameter of silver wire are controlled; the whole reaction is carried out under the condition of an environmental humidity of 30-60%, and the ultrafine silver nanowire with an average wire diameter of about 25nm, a wire length of about 40 <mu>m and a length-diameter ratio of up to 1500 can be obtained. The preparation method has simple operation, less by-products, high yield ratio and good repeatability, successfully amplified to 14L reaction is carried out, so that large-scale industrial production is extremely easy.

Description

technical field [0001] The invention belongs to the field of nanomaterial synthesis, and relates to the synthesis of silver nanowires, in particular to a silver nanowire with a high aspect ratio and a preparation method thereof. Background technique [0002] As the core components of electronic products such as solar cells, touch screens, and flat panel displays, transparent conductive films have a very large market space. Due to the shortage of indium element, the price of indium tin oxide (ITO), which is widely used at present, continues to rise. Therefore, it is necessary to develop a new type of transparent conductive film to replace ITO. Silver nanowire transparent conductive film is superior to ITO transparent conductive film in terms of the three most critical characteristics, that is, lower manufacturing cost, smaller sheet resistance, and better flexibility. Therefore, whether it is in high-end applications, such as flat panel Control panels, solar cells, etc., or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0547
Inventor 陈微微雷国伟梁雨轩张晓东魏葳田占元
Owner SHAANXI COAL & CHEM TECH INST
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