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A kind of silver nanowire assembly and its preparation method and flexible conductor

A technology of silver nanowires and assemblies, applied in the field of nanomaterials, can solve the problems of many process steps and general electromechanical properties of silver nanowire assemblies, and achieves the effects of simple process, good cycle characteristics, and good electromechanical properties.

Active Publication Date: 2018-04-10
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has many process steps, and the electrical and mechanical properties of the silver nanowire assembly obtained are general.

Method used

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  • A kind of silver nanowire assembly and its preparation method and flexible conductor
  • A kind of silver nanowire assembly and its preparation method and flexible conductor
  • A kind of silver nanowire assembly and its preparation method and flexible conductor

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preparation example Construction

[0031] The invention provides a method for preparing a silver nanowire assembly, comprising:

[0032] reacting polyvinylpyrrolidone solution and silver salt solution to obtain silver nanowire assembly;

[0033] The solvent in the polyvinylpyrrolidone solution includes ethylene glycol and glycerol;

[0034] The reaction temperature is from 100°C to 300°C.

[0035] In the invention, polyvinylpyrrolidone solution and silver salt solution are reacted to obtain silver nanowire assembly. In the present invention, the reaction temperature is from 100°C to 300°C. In an embodiment of the present invention, the temperature of the reaction is 120°C to 280°C; in other embodiments, the temperature of the reaction is 140°C to 260°C; in another embodiment, the temperature of the reaction is The temperature is 160°C-240°C; in another embodiment, the temperature of the reaction is 180°C-220°C.

[0036] In the embodiments of the present invention, the time of the reaction is 10 hours to 30 ...

Embodiment 1

[0068] In the case of constant stirring, 1.0 grams of polyvinylpyrrolidone (PVP) with a number-average molecular weight of 55,000 was added to 40 milliliters of a mixed solution of ethylene glycol and glycerol at a mass ratio of 16:1, and the resulting mixed The solution was heated to 125°C in an oil bath and stirred at 500 rpm; after stirring for 0.5 hours, a transparent light yellow solution was obtained; the obtained light yellow solution was placed in an ice bath, and removed when the temperature of the above solution dropped to room temperature ice bath to obtain a polyvinylpyrrolidone solution with a temperature of 35°C.

[0069] 0.5 g of silver nitrate was formulated into a 3 mmol / mL aqueous solution, and 0.03 g of sodium chloride was added thereto to obtain a 3 mmol / mL silver chloride solution.

[0070] Add 1 mL of the above silver chloride solution dropwise to the above polyvinylpyrrolidone solution and mix at 35°C to obtain a homogeneous solution; raise the temperatu...

Embodiment 2

[0077] In the case of constant stirring, 10.0 grams of polyvinylpyrrolidone (PVP) with a number-average molecular weight of 55,000 was added to 400 milliliters of a mixed solution of glycerol and ethylene glycol at a mass ratio of 1:16, and the resulting mixed The solution was heated to 125°C in an oil bath and stirred at 500 rpm; after stirring for 1 hour, a transparent light yellow solution was obtained; the obtained light yellow solution was placed in an ice bath, and removed when the temperature of the above solution dropped to room temperature ice bath to obtain a polyvinylpyrrolidone solution with a temperature of 35°C.

[0078] 5 g of silver nitrate was formulated into a 3 mmol / mL aqueous solution, and 0.3 g of sodium chloride was added thereto to obtain a 3 mmol / L silver chloride solution.

[0079] Add 10 mL of the above silver chloride solution dropwise to the above polyvinylpyrrolidone solution and mix at 35°C to obtain a homogeneous solution; raise the temperature t...

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Abstract

The invention provides a method for preparing a silver nanowire assembly, comprising: reacting a polyvinylpyrrolidone solution and a silver salt solution to obtain a silver nanowire assembly; the solvent in the polyvinylpyrrolidone solution includes ethylene glycol and acrylic acid Triol; the reaction temperature is 100°C to 300°C. The method provided by the present invention directly realizes the three-dimensional assembly process from silver ions to silver nanowires through a one-step method. This method is simple in process and has good reproducibility, and can be prepared conveniently, quickly and on a large scale to assemble silver nanowires. body; and the silver nanowire assembly prepared by the method provided by the invention has better electrical and mechanical properties. The invention also provides a silver nanowire assembly and a flexible conductor based on the silver nanowire assembly.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a silver nanowire assembly, a preparation method thereof and a flexible conductor. Background technique [0002] Nanowires have a high aspect ratio, their particle transport is unconstrained in one direction, exhibit excellent optical, electrical, magnetic, acoustic, thermal and other properties, and have potential application value in the field of engineering technology. However, due to the microscopic nature of nanomaterials, the application of single nanowires is very difficult at present, so assembly methods (such as electromagnetic fields, Langmuir-Bougett method, etc.) are often used to obtain some macroscopic nanomaterial assemblies. , and then better research and use of nanomaterials. [0003] The prior art provides a variety of preparation methods for silver nanowire assemblies, such as the British "Scientific Reports" (SCIENTIFIC REPORTS, DOI: 10.1038) repo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24H01B1/02
CPCH01B1/02B22F9/24B22F1/054
Inventor 俞书宏王智华刘建伟王金龙
Owner UNIV OF SCI & TECH OF CHINA
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