Production method of nanometer silver wire material

A nano-silver wire and production method technology, applied in the field of nano-material production technology, can solve the problems of high production cost, low production efficiency, and non-single shape of finished products, and achieve good quality, improve production efficiency, and save time and labor in the processing process Effect

Active Publication Date: 2012-09-26
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a simple and reliable process, high production efficiency, A production method of nano-silver wire material with low production cost. The product obtained by this method has the characteristics of single nano-silver wire shape, high purity, good quality, and uniform size distribution.

Method used

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  • Production method of nanometer silver wire material
  • Production method of nanometer silver wire material
  • Production method of nanometer silver wire material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Solution phase reduction

[0029] At room temperature, weigh the raw materials according to the molar ratio of 1:0.001:0.02:0.002:0.0001, put glycerin, water, polyvinyl pyrrolidone, silver nitrate, and sodium chloride with a total volume of 5 liters into a 10-liter container In the glass reactor, the order of feeding is glycerin, polyvinyl alcohol pyrrolidone, water, silver nitrate, sodium chloride, under the mechanical stirring of the polytetrafluoroethylene stirring rod (the speed is 100 rpm), until all the raw materials are completely dissolved The mixture was obtained, and the reactor was heated by means of a circulating oil bath, and the temperature of the mixture was increased from room temperature to 200° C. within 10 minutes, and then continued to stir for 30 minutes to obtain a silver nanowire stock solution. During this process, an air condenser is placed on the top of the reactor with an open top for condensing volatiles back. Wherein the number average ...

Embodiment 2

[0039] (1) Solution phase reduction

[0040] At room temperature, weigh the raw materials according to the molar ratio of 1:0.001:0.02:0.003:0.0002, put a total volume of 5 liters of glycerin, water, polyvinyl pyrrolidone, silver nitrate, and potassium chloride into 10 liters of reaction In the still, the order of feeding is glycerin, polyvinyl pyrrolidone, water, silver nitrate, potassium chloride, stirring continuously at room temperature for 30 to 50 minutes, under the mechanical stirring of polytetrafluoroethylene stirring rod (rotating speed is 100 rpm / minutes) and mix, when all the raw materials are completely dissolved, the temperature of the mixture is increased from room temperature to 190°C within 10 minutes, and then the stirring is continued for 30 minutes to obtain a stock solution containing silver nanowires. In this process, an air condenser is placed on the top of the reactor, and the top is open. .Wherein the number average molecular weight of polyvinyl alco...

Embodiment 3

[0048] (1) Solution phase reduction

[0049] At room temperature, weigh the raw materials according to the molar ratio of 1:0.001:0.02:0.003:0.00075, put glycerin, water, polyvinyl alcohol pyrrolidone, silver nitrate, and calcium chloride into a 10-liter reactor, and feed The order is glycerin, polyvinyl alcohol pyrrolidone, water, silver nitrate, calcium chloride, under the mechanical stirring of polytetrafluoroethylene stirring rod (100 rpm), stirring at room temperature for 30 to 50 minutes, when After all the raw materials were completely dissolved, the temperature of the mixture was increased from room temperature to 190° C. within 10 minutes, and then the stirring was continued for 25 minutes to obtain a stock solution containing silver nanowires. In this process, an air condenser is arranged on the top of the reactor, and the top is open; the number average molecular weight of polyvinyl alcohol pyrrolidone is 40,000.

[0050] (2) cooling

[0051] Send the nano-silver wi...

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Abstract

The invention discloses a production method of a nanometer silver wire material. The production method comprises the following steps:(1) mixing glycerol, water, polyvinyl alcohol pyrrolidone, silver nitrate and chlorine salt and heating to 180-240 DEG C, and stirring for 30-50 minutes so as to obtain a nanometer silver wire stock solution; (2) cooling the nanometer silver wire stock solution to below 80 DEG C, and diluting with water so as to obtain a diluted nanometer silver wire solution; (3) carrying out desalting and surface active agent removing treatment on the diluted nanometer silver wire solution, and concentrating to obtain a finely purified nanometer silver wire solution; and (4) carrying out spray drying on the finely purified nanometer silver wire solution obtained in step (3) so as to obtain nanometer silver wire powder, and cooling so as to obtain a finished production of nanometer silver wire powder. The production method provided by the invention has the advantages that the process is simple and reliable, the nanometer silver wire is single in shape, the production efficiency is high and the production cost is low; and the produced products have the characteristics of high purity, good quality, uniform size distribution and the like.

Description

technical field [0001] The invention belongs to the field of nano material production technology, relates to a preparation method of nano material, in particular to a production method of nano silver wire material. Background technique [0002] Nanosilver wire material is an important one-dimensional nanomaterial, which can be widely used in the fields of catalysis, microelectronic connection, environment and sanitation management. At present, nano silver wire materials can be prepared by polyalcohol reduction, and ethylene glycol is usually used as a solvent and reducing agent in this preparation method. However, due to the low boiling point of ethylene glycol (lower than 200°C), it is not conducive to the Ostwald ripening process, which leads to a phenomenon that the yield of silver nanowires is too low. Due to the limitations of this preparation method, the nano-silver wires made contain by-product nano-silver particles, often after the synthesis work, methods such as ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 杨诚康飞宇李宝华
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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