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Method for preparing silver nano-wire in large batch

A silver nanowire, large-scale technology, applied in the field of large-scale preparation of silver nanowires, can solve the problems of increasing the complexity of the reaction process, and achieve the effects of high practical value, saving reaction time, and simple method.

Active Publication Date: 2008-11-26
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to reach such a high temperature by ordinary electric furnace heating, it is necessary to apply high pressure to the reaction solution during the reaction process, which increases the complexity of the reaction process.

Method used

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  • Method for preparing silver nano-wire in large batch
  • Method for preparing silver nano-wire in large batch
  • Method for preparing silver nano-wire in large batch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the preparation process, 50ml 0.01mol / l AgNO 3 The ethylene glycol solution of 0.02mol / l PVP and the ethylene glycol solution of 50ml 0.02mol / l PVP are dropped into 50ml ethylene glycol at a rate of 1 drop / second and mixed, and then the mixed solution is transferred to a 2.5GHz household microwave oven for heating, and the microwave power is adjusted 100w, microwave treatment 5min. After the reaction was completed, the resulting mixture was cooled to room temperature, and 400 ml of acetone was added to the mixture to wash away ethylene glycol and excess PVP, then ultrasonically treated for 5 minutes, and the mixture was centrifuged at 10,000 rpm for 5 minutes. The separated solid was washed with deionized water, ultrasonically treated and centrifuged, and repeated 5 times to obtain a solid powder that was dried in a vacuum oven for 6 hours to obtain solid silver nanowires. For the field emission scanning electron microscope (FESEM) sample, the powder sampl...

Embodiment 2

[0028] According to the preparation process, 50ml 0.03mol / l AgNO 3 The ethylene glycol solution of 0.06mol / l PVP and the ethylene glycol solution of 50ml 0.06mol / l PVP are dropped into 100ml ethylene glycol at a rate of 3 drops / second and mixed, and then the mixed solution is transferred to a 2.5GHz household microwave oven for heating, and the microwave power is adjusted 300w, microwave treatment 8min. After the reaction was completed, the resulting mixture was cooled to room temperature, and 700 ml of acetone was added to the mixture to wash away ethylene glycol and excess PVP. Then, it was sonicated for 8 minutes, and the mixture was centrifuged at 10,000 rpm for 8 minutes. The separated solid was washed with deionized water, ultrasonically treated and centrifuged, and repeated six times to obtain a solid powder that was dried in a vacuum oven for 8 hours to obtain solid silver nanowires. For the field emission scanning electron microscope (FESEM) sample, the powder sample...

Embodiment 3

[0030] According to the preparation process, 50ml 0.05mol / l AgNO 3 The ethylene glycol solution of 0.1mol / l PVP and the ethylene glycol solution of 50ml 0.1mol / l PVP are dropped into 250ml ethylene glycol at a rate of 5 drops / second and mixed, and then the mixed solution is transferred to a 2.5GHz household microwave oven for heating, and the microwave power is adjusted For 1000w, microwave treatment for 10min. After the reaction was finished, the resulting mixture was cooled to room temperature, and 1000 ml of acetone was added to the mixture to wash away ethylene glycol and excess PVP, then ultrasonically treated for 10 minutes, and the mixture was centrifuged at 10,000 rpm for 10 minutes. The separated solid was then washed with deionized water, ultrasonically treated and centrifuged, and repeated six times to obtain a solid powder that was dried in a vacuum oven for 10 hours to obtain solid silver nanowires. For the field emission scanning electron microscope (FESEM) samp...

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Abstract

The invention discloses a method for preparing nanometer silver lines in large batch. anhydrous silver nitrate AgNO3 with the concentration of 99.9percent, anhydrous glycol (C2H6O2) of 99.8percent and polyvinylpyrrolidone (PVP, with the molecular weight of 55,000) of 98percent are selected as the raw materials; in a microwave-assisting environment, the method of adopting the glycol to reduce the silver nitrate is adopted to prepare nanometer silver lines in large batch. By replacing the original solvent heating method with the high-heat environment created by microwave, the method not only greatly saves the reaction time but also reduces the preparing costs for the nanometer silver lines. The glycol, a moderate reducer, can slow the reaction, thus providing the time for the growth of nanometer silver lines. The method of the invention is the optimal method for preparing the nanometer silver line according to testing results by comparing the influence of micro strength, precursor concentration and microwave processing time on the appearance and size of the prepared nanometer lines. The method of the invention has low cost, is simple method and easily controlled and has high practical value in the application to the industrial production developing nanometer silver lines.

Description

technical field [0001] The invention belongs to the technical field of material preparation, in particular to a method for preparing silver nanowires in large quantities. Background technique [0002] The development of today's science and technology requires the characteristics of ultra-micronization, intelligence, high integration of components, high-density storage and ultra-fast transmission of materials, which provide a broad space for the application of nanotechnology and nanomaterials. Nanoscience and nanotechnology are currently one of the most dynamic research fields. In the past two decades, there has been great interest in the study of one-dimensional nanomaterials. The purpose of the research is to really use nanomaterials in industrial production and people's daily life, and really improve people's lives. In nanomaterials, because the nanoscale size is equivalent to or smaller than the physical characteristic size such as the wavelength of light, De Broglie wav...

Claims

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Application Information

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IPC IPC(8): B22F9/24C30B29/02C30B29/62C22B11/00
Inventor 陶宇陶国良吴海平
Owner 溧阳常大技术转移中心有限公司
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