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Method for preparing silver nanowires

A technology of silver nanowires and silver salts is applied in the field of preparing silver nanowires, which can solve the problems of high template requirements and limited number of nanowires, and achieve the effects of improving light transmittance, facilitating enlarged production, and reducing silver particles.

Inactive Publication Date: 2016-05-04
嘉兴禾浦光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it requires high templates, and the number of nanowires prepared each time is limited

Method used

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  • Method for preparing silver nanowires
  • Method for preparing silver nanowires
  • Method for preparing silver nanowires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Fill a 250mL three-necked reaction flask with a condensation reflux device with nitrogen, and preheat in an oil bath at 140°C; under nitrogen protection, add 0.5g of polyvinylpyrrolidone K60 to a 250mL conical flask, add 25mL of ethylene glycol and stir for 1 1 hour until fully dissolved; then take 0.25g of silver nitrate and add it to the above-mentioned Erlenmeyer flask, stir for 1 hour until fully dissolved; add 1.5g of ethylene glycol solution of ferric chloride with a molar concentration of 1 μM, and stir for 2 minutes; The above-mentioned mixed solution in the Erlenmeyer flask was poured into a three-necked reaction flask preheated before, and reacted for 5 hours.

[0028] Cool the reaction solution to room temperature, transfer the obtained mother solution to a centrifuge tube, add acetone with a volume 9 times the volume of the mother solution, shake it vigorously and settle naturally for 20 minutes, remove the supernatant, keep the bottom precipitate, repeat thi...

Embodiment 2

[0030] Fill a 250mL three-necked reaction flask with a condensation reflux device with nitrogen, and preheat in an oil bath at 140°C; under nitrogen protection, add 0.5g of polyvinylpyrrolidone K30 to a 250mL conical flask, add 25mL of ethylene glycol and stir for 1 1 hour until fully dissolved; then take 0.25g of silver nitrate and add it to the above-mentioned Erlenmeyer flask, stir for 1 hour until fully dissolved; add 1.5g of ethylene glycol solution of ferric chloride with a molar concentration of 1 μM, and stir for 2 minutes; The above-mentioned mixed solution in the Erlenmeyer flask was poured into a three-necked reaction flask preheated before, and reacted for 5 hours.

[0031] Cool the reaction solution to room temperature, transfer the obtained mother solution to a centrifuge tube, add acetone with a volume 9 times the volume of the mother solution, shake it vigorously and settle naturally for 20 minutes, remove the supernatant, keep the bottom precipitate, repeat thi...

Embodiment 3

[0033] Fill a 250mL three-necked reaction flask with a condensation reflux device with nitrogen, and preheat it in an oil bath at 140°C; under nitrogen protection, add 0.5g of polyvinylpyrrolidone K90 to a 250mL Erlenmeyer flask, add 25mL of ethylene glycol and stir for 1 1 hour until fully dissolved; then take 0.25g of silver nitrate and add it to the above-mentioned Erlenmeyer flask, stir for 1 hour until fully dissolved; add 1.5g of ethylene glycol solution of ferric chloride with a molar concentration of 1 μM, and stir for 2 minutes; The above-mentioned mixed solution in the Erlenmeyer flask was poured into a three-necked reaction flask preheated before, and reacted for 5 hours.

[0034]Cool the reaction solution to room temperature, transfer the obtained mother solution to a centrifuge tube, add acetone with a volume 9 times the volume of the mother solution, shake it vigorously and settle naturally for 20 minutes, remove the supernatant, keep the bottom precipitate, repea...

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Abstract

The invention discloses a method for preparing silver nanowires. Under protection of inert gas, a polymer polyhydric alcohol solution and a silver salt and halide polyhydric alcohol solution are sequentially added into a premixing container and are stirred to be completely dissolved, and mixed liquor is transferred to a reaction device which is preheated to 100-180 DEG C to react for 2-5 h; acetone with the volume being 5-9 times that of prepared silver nanowire mother liquor is added into the prepared silver nanowire mother liquor, natural settling is conducted for 10-30 min after acute vibration, supernatant is moved away, sediment is reserved, and the process is repeated 2-3 times; ethyl alcohol with the volume being 5-9 times that of the mother liquor is added into the sediment, centrifugal separation is carried out, supernatant is moved away, sediment is reserved, and the process is repeated 2-3 times; and obtained silver nanowires are stored in the ethyl alcohol in a scattered mode. The preparation method is one-pot, operation is simple, and stability and repeatability are good; stirring is not needed in the reaction process during preparation, and silver wire particles are few; the material adding speed does not need to be strictly controlled in the preparing process, and large-scale production is facilitated; separation and purification are carried out through natural settling of the acetone and then centrifugal sedimentation of the ethyl alcohol, so that the separation efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer materials, in particular to a method for preparing silver nanowires. Background technique [0002] As displays get larger and solar cells become cheaper, there is an increasing need for low-cost transparent electrodes. Various types of transparent conducting oxides (TCOs) have been widely used in optoelectronic devices, such as indium tin oxide (ITO), which is traditionally used in organic solar cells and light-emitting diodes. ITO is currently the most widely used transparent electrode material, mainly used in touch screens, flat panel displays, PDP displays and related technologies. But this material is relatively brittle, the preparation temperature is high, and it is relatively expensive, mainly because it needs to grow scarce indium on the surface. When scientists are looking for alternative materials to ITO, it is difficult to find other materials with excellent comprehens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 邹文君
Owner 嘉兴禾浦光电科技有限公司
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