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Large-length-diameter ratio silver nanowire based on one-pot polyol method and preparation method and application thereof

A technology of silver nanowires and high aspect ratio, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of cumbersome operation, high cost, complicated operation, etc., and achieve broad application prospects , the effect of rapid preparation

Inactive Publication Date: 2019-12-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the commercial super-long silver nanowires are mostly prepared by the template method, but the common problems are high cost, complicated operation, and difficulty in large-scale production; some literatures report the preparation of silver nanowires by solution method, the length can reach 100 μm, but the diameter is greater than 50nm; Some literatures also report the preparation of silver nanowires by polyol method, the diameter can be between 20nm-30nm, but the operation is cumbersome and the reaction conditions are strict.

Method used

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  • Large-length-diameter ratio silver nanowire based on one-pot polyol method and preparation method and application thereof
  • Large-length-diameter ratio silver nanowire based on one-pot polyol method and preparation method and application thereof
  • Large-length-diameter ratio silver nanowire based on one-pot polyol method and preparation method and application thereof

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Embodiment 1

[0032] This embodiment provides a high aspect ratio silver nanowire based on a one-pot polyol method and a preparation method thereof, and the specific steps are as follows:

[0033] 1. Prepare polyvinylpyrrolidone (PVP) ethylene glycol solution: weigh a certain amount of PVP powder, add it to 80°C ethylene glycol solution, and stir at a constant speed to dissolve the PVP. The molecular weight of PVP is 1,300,000.

[0034] 2. Preparation of silver nitrate (AgNO 3 ) of ethylene glycol solution: weigh a certain amount of AgNO 3 powder, add it to the ethylene glycol solution at room temperature, and stir rapidly to make the AgNO 3 dissolve.

[0035] 3. Prepare the ethylene glycol solution of the alkali metal chloride: weigh a certain amount of sodium chloride (NaCl) powder, add it to the ethylene glycol solution at room temperature, and stir at a constant speed to dissolve the sodium chloride.

[0036] 4. Take 50mL of ethylene glycol solution in a 100mL round bottom flask, an...

Embodiment 2

[0041] This embodiment provides a high aspect ratio silver nanowire based on a one-pot polyol method and a preparation method thereof, and the specific steps are as follows:

[0042] On the basis of Example 1, the reaction time in step 5 was changed to: constant temperature reaction for 1 h.

[0043] The silver nanowire dispersion liquid particle content that obtains is less, slightly more than embodiment 1, as figure 2 shown. The diameter of the silver nanowire is 50-100 nm; the length is 10-30 μm. Compared with Example 1, although the silver nanowires have larger diameters and shorter lengths, they can still meet the requirements for the preparation of transparent electrodes, and the reaction time is shorter.

Embodiment 3

[0045] This embodiment provides a high aspect ratio silver nanowire based on a one-pot polyol method and a preparation method thereof, and the specific steps are as follows:

[0046] On the basis of Example 1, change the reaction conditions in step 5 to: place the flask containing the reaction solution in an oil bath, heat up to 120°C within 20min, and react at a constant temperature for 0.5h; then heat up to 160°C within 10min. ℃, constant temperature reaction for 1h. The round bottom flask was connected to the reflux device and sealed during this process.

[0047] The diameter of the silver nanowire obtained in this embodiment is greater than 100 nm, and the length is less than 10 μm. The silver nanowire becomes thicker and shorter, and the aspect ratio decreases obviously. The influence of the temperature change in the reaction process on the quality of silver nanowires is illustrated. The stable reaction temperature during the synthesis is conducive to the formation of u...

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Abstract

The invention belongs to the technical field of synthesis of metal nanowires, and particularly relates to a large-length-diameter ratio silver nanowire based on a one-pot polyol method and a simple, efficient and rapid preparation method and application thereof. The preparation method comprises the steps that a PVP solution, a metal chloride solution and an AgNO3 solution are evenly mixed and react for 1-2 hours at a constant temperature of 120-160 DEG C through a one-pot method, and then cooling and centrifugation are conducted to obtain a dispersion solution of the large-length-diameter ratio silver nanowire. According to the preparation method, the one-pot synthesis method is adopted, and the controllability of a polyol synthesis method and the uniformity of a hydrothermal method are effectively combined to realize simple, efficient and rapid preparation of the large-length-diameter ratio silver nanowire. After centrifugal cleaning, the silver nanowire dispersion solution with an extremely low particle content is obtained. The silver nanowire has a diameter of 30-50nm, a length of 30-40 [mu]m and a length-diameter ratio of 1000 and has a broad application prospect in the fieldsof touch screen panel, organic solar cells, organic light-emitting diodes, and the like.

Description

technical field [0001] The invention belongs to the technical field of metal nanowire synthesis, and in particular relates to a silver nanowire with high aspect ratio based on a one-pot polyol method and its simple and efficient rapid preparation method and application. Background technique [0002] Flexible transparent electrodes play an important role in the fields of touch screen panels, organic solar cells, organic light-emitting diodes, etc., and can simultaneously achieve high mechanical flexibility, optical transparency, and electrical conductivity. Currently, the most effective and widely used transparent conductive material on the market is indium tin oxide (ITO), but its lack of flexibility and high manufacturing cost are not suitable for the preparation of a new generation of flexible transparent electrodes. The study found that a conductive percolation network based on one-dimensional silver nanowires is the most promising solution. The conductivity of the silve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/07B22F1/0547
Inventor 刘岚邢舒婷刘泽林彭泽飞郑荣敏邓智富李俊云伍垚屹
Owner SOUTH CHINA UNIV OF TECH
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