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Method for preparing silver nanowires with smaller diameter through mixing polyhydric alcohols

A silver nanowire and small-diameter technology, which is applied in the field of nanomaterial preparation, can solve the problems of difficult control of nanowire diameter uniformity, failure to meet market demand, and difficulty in large-scale preparation, and achieve easy implementation and promotion, uniform diameter Easy to control and reproducible results

Active Publication Date: 2017-07-11
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this method needs to precisely control the reaction conditions, the repeatability of the experiment is poor, the uniformity of the nanowire diameter is difficult to control, and the purity is low, so it is difficult to prepare on a large scale and cannot meet the market demand.

Method used

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  • Method for preparing silver nanowires with smaller diameter through mixing polyhydric alcohols
  • Method for preparing silver nanowires with smaller diameter through mixing polyhydric alcohols
  • Method for preparing silver nanowires with smaller diameter through mixing polyhydric alcohols

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Step1: Prepare the solution for the reaction

[0039] Heat and stir 0.1330 g of polyvinylpyrrolidone (PVP-1300000) in an oil bath at 150° C. and dissolve in 6 ml of diethylene glycol to form solution A.

[0040] Solution B was formed by dissolving 0.135 g of silver salt in 2 ml of ethylene glycol at room temperature.

[0041] Solution C was formed by dissolving 0.0016 g of the chloride salt in 10 ml of ethylene glycol at room temperature.

[0042] The total volume of solution A, solution B and solution C is 18 ml.

[0043] Step2: The reaction generates a mixed solution

[0044] Pour solution C into solution A, heat and stir at 150°C to mix evenly to form mixed solution D.

[0045] Step3: Generate silver nanowires

[0046] Slowly add solution B to mixed solution D at a rate of 10ml / h through a microflow pump, heat (150°C) and stir in an oil bath while adding dropwise, then condense and reflux, and finally react at 150°C for 18 minutes , that is, to generate silver n...

Embodiment 2

[0052] Step1: Prepare the solution for the reaction

[0053] 0.1330 g of polyvinylpyrrolidone (PVP-1300000) was heated and stirred in an oil bath at 150° C. and dissolved in 8 ml of diethylene glycol to form solution A.

[0054] Solution B was formed by dissolving 0.135 g of silver salt in 2 ml of ethylene glycol at room temperature.

[0055] Solution C was formed by dissolving 0.0016 g of the chloride salt in 8 ml of ethylene glycol at room temperature.

[0056] The total volume of solution A, solution B and solution C is 18 ml.

[0057] Step2: The reaction generates a mixed solution

[0058] Pour solution C into solution A, heat and stir at 150°C to mix evenly to form mixed solution D.

[0059] Step3: Generate silver nanowires

[0060] Slowly add solution B to mixed solution D at a rate of 10ml / h through a microflow pump, heat (150°C) and stir in an oil bath while adding dropwise, then condense and reflux, and finally react at 150°C for 18 minutes , that is, to generate...

Embodiment 3

[0066] Step1: Prepare the solution for the reaction

[0067] Heat and stir 0.1330 g of polyvinylpyrrolidone (PVP-1300000) in an oil bath at 150° C. and dissolve in 10 ml of diethylene glycol to form solution A.

[0068] Solution B was formed by dissolving 0.135 g of silver salt in 2 ml of ethylene glycol at room temperature.

[0069] Solution C was formed by dissolving 0.0016 g of the chloride salt in 6 ml of ethylene glycol at room temperature.

[0070] The total volume of solution A, solution B and solution C is 18 ml.

[0071] Step2: The reaction generates a mixed solution

[0072] Pour solution C into solution A, heat and stir at 150°C to mix evenly to form mixed solution D.

[0073] Step3: Generate silver nanowires

[0074] Slowly add solution B to mixed solution D at a rate of 10ml / h through a microflow pump, heat (150°C) and stir in an oil bath while adding dropwise, then condense and reflux, and finally react at 150°C for 18 minutes , that is, to generate silver n...

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Abstract

The invention discloses a method for preparing silver nanowires with smaller diameters through mixing polyhydric alcohol, in which, silver nanowires with different diameters, different lengths and smaller diameters can be obtained by regulating the volume ratio, reaction temperature, and reaction time of ethanediol and diethylene glycol. The beneficial effects of the invention are: (1) the silver nanowires with different diameters and different lengths can be obtained, and the diameters of the silver nanowires may be controlled to be 40 nm or lower, even may be reduced to about 20 nm; (2) the reaction condition is not required to be accurately controlled, the uniformity of the diameters of the silver nanowires is easily controlled, the purity is relatively high, and can be prepared in a large scale; and (3) no expensive experiment apparatus is needed and the preparing cost is low.

Description

technical field [0001] The invention relates to a method for preparing silver nanowires, in particular to a method for preparing silver nanowires with smaller diameters by mixing polyols, and belongs to the technical field of nanomaterial preparation. Background technique [0002] Silver nanowires are a new type of one-dimensional nanomaterials. In addition to the advantages of large specific surface area, high surface activity and excellent catalytic performance of nanoparticles, silver nanowires also have excellent electrical conductivity, and transparent materials with excellent electrical conductivity and transparency can be prepared. Conductive thin-film electrodes for flexible displays can be used to replace expensive ITO with large defects. [0003] At present, there are many methods for preparing silver nanowires, which are mainly divided into two categories: physical methods and chemical methods, each of which has its own advantages and disadvantages. [0004] Amon...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/0547
Inventor 张文彦杨瑞锋范亚苛燕阳天张芳曹凤张思思刘亚男王尧宇
Owner NORTHWEST UNIV
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