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Preparation method of uniform silver nanowire with high length-diameter ratio

A silver nanowire, high aspect ratio technology, used in metal processing equipment, transportation and packaging, etc.

Active Publication Date: 2015-11-25
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the preparation methods of silver nanowires have been reported a lot, there are few preparation methods to obtain silver nanowires with uniform aspect ratio and high aspect ratio without other particles or impurities. Therefore, a method with stable process and few control factors is invented. , a simple, rapid, mass-prepared method of Ag nanowires and its importance

Method used

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  • Preparation method of uniform silver nanowire with high length-diameter ratio

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Experimental program
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Effect test

Embodiment 1

[0013] Dissolve 0.16g of silver nitrate in 20ml of glycerol at room temperature to form solution A; dissolve 5g of polyvinylpyrrolidone in 80ml of glycerol at room temperature to form solution B; mix solution A and solution B evenly to form solution C; add 5ml of ultrapure water to solution C, mix well to form solution D, and finally transfer solution D to the reaction kettle and place it in an oven with a set temperature of 160°C, and finish the reaction after a certain period of time;

[0014] The Ag nanowire mother liquor in the reaction kettle was diluted with alcohol and centrifuged twice to obtain precipitates with a diameter of 30-40nm and a length of 10-20mm silver nanowires dispersed in isopropanol. figure 1 It is the silver nanowire scanning electron microscope (SEM) figure synthesized in the present embodiment 1;

Embodiment 2

[0016] Dissolve 0.16g of silver nitrate in 20ml of glycerol at room temperature to form solution A; dissolve 5g of polyvinylpyrrolidone in 80ml of glycerol at room temperature to form solution B; mix solution A and solution B evenly to form solution C; add 2.5ml of ultrapure water to solution C, mix well to form solution D, and finally transfer solution D to the reaction kettle and place it in an oven with a set temperature of 160°C, and finish the reaction after a certain period of time;

[0017] The Ag nanowire mother liquor in the reaction kettle was diluted with alcohol and centrifuged twice to obtain precipitates with a diameter of 30-40nm and a length of 10-20mm silver nanowires dispersed in isopropanol;

Embodiment 3

[0019] Dissolve 0.32g of silver nitrate in 20ml of glycerol at room temperature to form solution A; dissolve 7g of polyvinylpyrrolidone in 80ml of glycerol at room temperature to form solution B; mix solution A and solution B evenly To form solution C; add 10ml of ultrapure water to solution C, mix well to form solution D, and finally transfer solution D to the reaction kettle and place it in an oven with a set temperature of 160°C, and finish the reaction after a certain period of time;

[0020] The Ag nanowire mother liquor in the reaction kettle was diluted with alcohol and centrifuged twice to obtain precipitates with a diameter of 30-40 nm and a length of 10-20 mm, which were dispersed in isopropanol.

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Abstract

The invention provides a preparation method of a uniform silver nanowire with a high length-diameter ratio. The preparation method comprises the following steps: dissolving silver nitrate in glycerine at a certain temperature, so as to obtain a solution A; dissolving polyvinylpyrrolidone (PVP) in glycerine at a certain temperature, so as to obtain a solution B; mixing the solution A and the solution B into a uniform solution C; adding a certain quantity of a medium into the solution C, so as to obtain a uniform solution D; finally, transferring the solution D into a reaction kettle, putting the reaction kettle into an oven with a set temperature, and carrying out a reaction for a certain time; conducting twice centrifugal separation on the reaction product, so as to obtain the sediment, namely the silver nanowire. Due to the addition of the medium, the kinematic velocity of ions in the reaction solution can be increased, so as to obtain the silver nanowire with high length-diameter ratio; the preparation method is simple and easy to operate; the experiment is stable; the preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing Ag nanowires, in particular to a method for preparing uniform silver nanowires with high aspect ratio. Background technique [0002] Based on the properties of high specific surface area, electrical conductivity and thermal conductivity, silver nanowires endow silver nanowires with broad application prospects, especially as ITO substitute materials in solar energy, OLED, flexible and large-size touch screen displays, conductive polymers and In the field of composite materials, and electrode printing ink additives, etc. Therefore, the salt preparation of silver nanowires has become a research hotspot for researchers. At present, there are many literatures and patent reports on the preparation method and application of silver nanowires. For example, Xia Younan (Advanced Materials (2002) 14,883), the founder of the preparation of silver nanowires by polyol reduction method, used Pt as the seed crystal, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
CPCB22F9/24B22F1/0547B22F2301/255B22F1/07B22F2304/054
Inventor 李璐刘碧桃金容陈善勇闫恒庆关有为
Owner CHONGQING UNIV OF ARTS & SCI