Method for manufacturing silver nanowires

A technology of silver nanowires and silver salts, which is applied in the field of preparation of silver nanowires, can solve problems such as the inability to form silver nanowires in series, complex post-processing, and large sewage problems, and achieve large-scale production, convenient operation, and good repeatability

Active Publication Date: 2013-07-17
苏州冷石纳米材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods can effectively prepare silver nanowires, most of these methods involve high viscosity, high boiling point and non-environmentally friendly organic solvents in the production process, the post-treatment process is complicated, and it is easy to cause environmental pol

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  • Method for manufacturing silver nanowires
  • Method for manufacturing silver nanowires
  • Method for manufacturing silver nanowires

Examples

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Example Embodiment

[0049] Example 1

[0050] A method for preparing silver nanowires includes the following steps: (1) Weigh 1 g of potassium chloride, 1 g of polyvinylpyrrolidone, and 0.5 g of glucose into 50 ml of water, stir or dissolve by ultrasound to obtain a mixed solution A; (2) ) Weigh 1 g of gelatin into 25 ml of water and ultrasonically shake until it is completely dissolved; then add 0.75 g of silver nitrate to the above solution and stir it thoroughly to dissolve evenly to obtain mixed solution B; (3) mix mixed solution A and mixed solution B And stir it evenly, then transfer to the reactor, heat to 140℃ and keep it for 150 minutes, then stop heating to obtain the silver nanowire stock solution; (4) Dilute the silver nanowire stock solution by 5 times with water and ethanol in any mixed solvent, and then Centrifuge at 8000 rpm for 5 minutes and concentrate to obtain a silver nanowire concentrate; (5) Place the silver nanowire concentrate in an oven and bake at 100°C for 60 minutes to o...

Example Embodiment

[0052] Example 2

[0053] On the basis of Example 1, during the preparation process, only the amount of silver nitrate in step (2) was reduced to 0.5 g, and other process parameters were kept unchanged, and silver with a diameter of 40 nanometers and a length of 30-40 microns was prepared. Nanowires.

[0054] Figure 4 The scanning electron microscope image of the silver nanowire powder product prepared in this example is shown by Figure 4 It can be seen that the silver nanowires are uniformly distributed. Figure 5 It is an optical microscope photo of the product. It can be seen from the figure that the silver nanowires obtained are uniformly distributed and the length is about 30-40 microns.

Example Embodiment

[0055] Example 3

[0056] On the basis of Example 1, during the preparation process, the amount of polyvinylpyrrolidone in step (1) was reduced to 0.75 g, and the amount of silver nitrate in step (2) was reduced to 0.5 g, and other process parameters remained unchanged. A silver nanowire with a diameter of 40 nanometers and a length of 1 to 5 microns is obtained.

[0057] Image 6 The scanning electron microscope image of the silver nanowire powder product prepared in this example, Figure 7 It is an optical microscope photo of the product.

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Abstract

The invention discloses a method for manufacturing silver nanowires. The method includes steps of (1), manufacturing mixed solution A from surfactants, halogen-containing inorganic salt, reducing sugar and water; (2), manufacturing mixed solution B from gelatin, water and silver salt precursors; (3), mixing the mixed solution A with the mixed solution B, uniformly stirring the mixed solution A and the mixed solution B, transferring the mixed solution A and the mixed solution B into a reaction kettle, sealing the reaction kettle, heating the reaction kettle, keeping the temperature of the reaction kettle unchanged and obtaining stock solution of the silver nanowires; (4), diluting the stock solution of the silver nanowires by mixed solvents comprising water and ethanol, and removing the surfactants and the salt of the diluted stock solution of the silver nanowires to obtain concentrated solution of the silver nanowires; and (5), drying the concentrated solution of the silver nanowires to obtain powdery products of the silver nanowires. The method has the advantages that organic solvents are omitted, and the method is environment-friendly; lengths and diameters of the silver nanowires manufactured by the method can be adjusted within large ranges; and a process is simple, operation is convenient, the repeatability is good, and large-scale production can be effectively implemented.

Description

technical field [0001] The invention relates to a method for preparing silver nanowires, in particular to a silver nanowire that can be used in chemical and electrochemical catalysis, chemical sensors, biomolecular sensors, optical information storage, solar cells, printed electronics, electromagnetic shielding, touch screens, etc. A series of preparation methods of silver nanowire materials. Background technique [0002] Transparent conductive films based on indium tin oxide (ITO) are widely used in touch products that have emerged in recent years, and are also widely used in liquid crystal displays, electromagnetic shielding layers, thin-film solar cells and other products. However, several inherent problems of ITO cannot be overcome, such as: the processing process of ITO is complex and consumes a lot of energy; indium in ITO is a scarce resource, which is over-developed and unevenly distributed around the world, which cannot meet the greater demand ; ITO is an oxide, it...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 丁轶谷小虎王正元
Owner 苏州冷石纳米材料科技有限公司
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