Preparation method of high-yield silver nanowire

A nano-silver wire, high-yield technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the impact of the production of nano-silver wire, incomplete reaction of nano-silver wire, and limited multiple Promote the promotion of alcohol method and other issues, achieve the effect of strong reducibility, cost saving and increase production

Inactive Publication Date: 2020-04-17
浙江省科创新材料研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polyol method also has certain problems. As a wet chemical method, the preparation of silver nanowires always faces the problem of incomplete reaction and low yield; at the same time, the preparation process involves multiple solvent transfers. (centrifugation, cleaning), these processes will inevitably also cause certain losses, which will have an impact on the yield of preparing nano-silver wires, and greatly limit the industrial promotion of the polyol method.

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  • Preparation method of high-yield silver nanowire
  • Preparation method of high-yield silver nanowire

Examples

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Example Embodiment

[0034] Example 1

[0035] A method for preparing high-yield nano silver wires includes the following steps:

[0036] 1) Add 0.8g of PVP with a molecular weight of 40,000 and 0.8g of PVP with a molecular weight of 400,000 to the reaction vessel, then add 200mL of ethylene glycol solution, and place the reaction vessel containing the above solution in a thermostatic magnetic stirrer for stirring. The temperature is 140°C, the stirring speed is 150rpm, and the stirring time is 120min;

[0037] 2) Add 18 mL of ferric chloride ethylene glycol solution (0.0005g / mL) that has been stirred at room temperature for more than 120 minutes into the reaction vessel, and continue stirring for 30 minutes at a temperature of 140°C at a speed of 150 rpm;

[0038] 3) Subsequently, 24 mL of silver nitrate glycol solution (0.05g / mL) that has been stirred at room temperature for more than 30 minutes was added dropwise to the reaction vessel with a dropping rate of 0.5mL / min. After all the drops were comp

Example Embodiment

[0042] Example 2

[0043] A method for preparing high-yield nano silver wires includes the following steps:

[0044] 1) Add 0.8g of PVP with a molecular weight of 58,000 and 0.8g of PVP with a molecular weight of 240,000 to the reaction vessel, and then add 200mL of ethylene glycol solution, and place the reaction vessel containing the above solution in a thermostatic magnetic stirrer for stirring. The temperature is 140°C, the stirring speed is 350rpm, and the stirring time is 60min;

[0045] 2) Add 18 mL of ferric chloride ethylene glycol solution (0.0005g / mL) that has been stirred at room temperature for more than 120 minutes into the reaction vessel, and continue to stir for 30 minutes at a temperature of 140°C at a speed of 350 rpm;

[0046] 3) Subsequently, 24 mL of silver nitrate glycol solution (0.05g / mL) that has been stirred at room temperature for more than 30 minutes was added dropwise to the reaction vessel with a dropping rate of 0.5mL / min. After all the drops were co

Example Embodiment

[0050] Example 3

[0051] A method for preparing high-yield nano silver wires includes the following steps:

[0052] 1) Add 0.8g of PVP with a molecular weight of 40,000 and 0.8g of PVP with a molecular weight of 400,000 to the reaction vessel, then add 200mL of ethylene glycol solution, and place the reaction vessel containing the above solution in a thermostatic magnetic stirrer for stirring. The temperature is 170°C, the stirring speed is 200rpm, and the stirring time is 120min;

[0053] 2) Add 27mL of copper chloride glycol solution (0.0005g / mL) that has been stirred at room temperature for more than 120 minutes into the reaction vessel, and continue to stir for 30 minutes at a temperature of 170°C at a speed of 200rpm;

[0054] 3) Subsequently, 24mL of silver nitrate glycol solution (0.05g / mL) that has been stirred at room temperature for more than 30 minutes was added dropwise to the reaction vessel with a dropping rate of 1mL / min. After all the drops were completed, the grow

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Abstract

The invention discloses a preparation method of a high-yield silver nanowire. The preparation method comprises the following steps of (1) conducting stirring and dispersing of a polyvinylpyrrolidone polyhydric alcohol solution for 60-120 minutes at the temperature of 140-170 DEG C, wherein the PVP polyhydric alcohol solution comprises a polyhydric alcohol solution A with the PVP molecular weight of 40000-58000 and a polyhydric alcohol solution B with the PVP molecular weight of 240000-400000; (2) adding a seed crystal inducer solution, and continuously conducting stirring for 15-30 minutes atthe stirring speed of 150-350 rpm and the temperature of 140-170 DEG C; (3) dropwise adding a silver salt solution into the solution, keeping the stirring speed of 150-350 rpm and the temperature of 140-170 DEG C, making a reaction for 2-4 hours, and conducting cooling at room temperature; (4) centrifuging a product for 15-60 minutes at the speed of 4000-18000 rpm, and removing supernatant; and (5) injecting ethanol into the product to ultrasonically clean the product silver nanowire in the ethanol, drying an obtained suction filtration product at 50-100 DEG C, so as to obtain pure silver nanowire powder. The yield of the silver nanowire reaches up to 95%, the process steps are simple, and the reducibility is high.

Description

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Claims

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Application Information

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Owner 浙江省科创新材料研究院
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