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Macroscopic quantity preparation method of dispersed silver nanowires

A silver nanowire, monodisperse technology, applied in nanotechnology and other directions, can solve the problems of cumbersome post-processing, low cost, complicated process, etc., and achieve the effects of convenient industrial production, high uniformity, and simple operation.

Inactive Publication Date: 2016-09-07
吕振瑞 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the template method is that it can obtain uniform nanowires with an aspect ratio that can be adjusted within a certain range, but because it needs to prepare the required template in advance, it has the disadvantages of very complicated process, time-consuming, high cost and cumbersome post-processing; The growth method generally needs to add some noble metal particles in advance as the induced growth source. This process requires precise control, high cost and low yield; the preparation process of the polyol reduction method is simple, and the obtained silver nanowires have a large aspect ratio and excellent The advantages of decentralization and low cost, but it cannot be mass-produced and applied
[0004] At present, the reason why silver nanowires are not widely used is that there is no suitable method for mass production of high-quality silver nanowires.

Method used

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  • Macroscopic quantity preparation method of dispersed silver nanowires
  • Macroscopic quantity preparation method of dispersed silver nanowires
  • Macroscopic quantity preparation method of dispersed silver nanowires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for macro-preparing monodisperse silver nanowires, comprising the following steps:

[0032] 1) Under constant stirring, add 0.2g of polyvinylpyrrolidone (PVP) into the mixed solution of 40mg of ethylene glycol and glycerol to obtain a mixed reaction solution, heat up and stir the solution in an oil bath, and stir for one hour Finally, a transparent light yellow solution is formed, then weigh 0.1g of silver chloride and add to the above light yellow solution, slowly heat up to 80°C, use magnetic stirring to completely dissolve the silver chloride, and the color of the solution is orange-yellow;

[0033] 2) Add 1ml of sodium bromide solution with a concentration of 0.05g / ml to the orange-yellow solution obtained in step 1), and stir until a uniform solution is formed;

[0034] 3) Put the homogeneous solution obtained in step 2) in a reaction vessel, keep it warm for 5 hours in a 160°C incubator, add an equal volume of deionized water to the above homogeneous solu...

Embodiment 2

[0037] The surfactant used is polyvinylpyrrolidone (PVP), and the dosage is 8g; the silver salt used is silver nitrate, and the dosage is 4g; the concentration of the metal halide salt used is 0.05g / ml, and 4ml is added; the remaining parameters are the same as in Example 1 in the same.

[0038] The silver nanowires synthesized by the method of this embodiment, the performance testing results are as follows: Figure 5 , Image 6 as shown, Figure 5 with Image 6 Represent the scanning low-magnification and high-magnification photos of the silver nanowires prepared under this condition respectively. From these two pictures, we can see that the silver nanowires prepared by this method still have a good crystallinity and homogeneity.

Embodiment 3

[0040] 1) In the case of constant stirring, add 0.2g polyacrylamide to 40mg ethylene glycol solution to obtain a reaction mixed solution. The solution is heated and stirred in an oil bath. After stirring for one hour, a transparent light yellow solution is formed. , then weighed 0.1g of silver chloride and added to the above light yellow solution, slowly warming up to 100°C, using magnetic stirring to completely dissolve the silver chloride, and the color of the solution was orange-yellow;

[0041] 2) Add 1ml of copper bromide solution to the orange-yellow solution obtained in step 1), the concentration is 0.05g / ml, stir evenly until a uniform solution is formed;

[0042] 3) Put the homogeneous solution obtained in step 2) into a reaction vessel, and keep it in a 160°C incubator for 5 hours;

[0043] 4) Add an equal volume of ethanol to the above-prepared silver nanowires, then centrifuge at 4000rpm for 10min, the result obtained is as follows Figure 7 As shown, when the cen...

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Abstract

The invention discloses a macroscopic quantity preparation method of dispersed silver nanowires and belongs to the technical field of silver nanowire preparation. The method includes the steps that firstly, silver salt, surfactant and a reductive polyalcohol solvent are mixed according to the mass ratio of 1: (0.2-5): (0.4-50), and a uniform reaction solution A is formed; secondly, a metal haloid aqueous solution 0.002 time to 2 times of the mass of the reaction solution A is added into the reaction solution A, uniform stirring is performed, and a reaction solution B is obtained; and thirdly, the reaction solution B is placed in a container, heat preservation is performed for 3 h to 30 h at the temperature ranging from 100 DEG C to 300 DEG C, cooling is performed till room temperature is achieved, a cleaning agent of the same volume as the reaction solution B is used for cleaning the reaction solution B, and then the silver nanowires are obtained. The method is simple in step and easy to operate and has the beneficial effects that operation is convenient and fast, macroscopic quantity preparation of the silver nanowires can be achieved, the obtained silver nanowires have very good crystallinity, uniformity and high length-diameter ratio, and industrialized production is convenient.

Description

technical field [0001] The invention relates to a silver nanowire, in particular to a method for macroscopically preparing monodisperse silver nanowires, and belongs to the technical field of silver nanowire preparation. Background technique [0002] Due to the particularity of its own structure, nanomaterials determine that its physical effects such as macroscopic electricity, magnetism, light, sound and heat are very different from conventional materials. With the development of science and technology, more and more intelligent, lightweight and refined materials are required. Taking electronic equipment as an example, there is an urgent need to invent a material that can not only work efficiently and energy-saving, but also have extremely low cost, certain strength and small size. Among many materials, silver nanowires have great advantages: excellent ductility, high electrical conductivity, corrosion resistance and good mechanical strength. [0003] Common synthesis met...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 吕振瑞周兴国王干
Owner 吕振瑞
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