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Silver nanoparticles and preparation method thereof

A technology of nano-silver particles and silver salts, which is applied in the field of nano-materials, can solve the problems of high preparation cost, unstable conductivity, and uneven particle diameter distribution of nano-silver particle products, and achieve low cost, uniform particle size distribution, and high preparation conditions. Gentle and Controllable Effect

Inactive Publication Date: 2018-05-11
珠海纳金科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a nano-silver particle and a preparation method thereof, aiming at solving the problem of uneven particle diameter distribution, unstable conduction and high preparation cost of the product obtained by the existing nano-silver particle preparation technology technical issues

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  • Silver nanoparticles and preparation method thereof
  • Silver nanoparticles and preparation method thereof

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preparation example Construction

[0019] On the one hand, the embodiment of the present invention provides a kind of preparation method of nano-silver particle, and this preparation method comprises the following steps:

[0020] S01: Provide silver salt, reducing agent, surfactant and solvent;

[0021] S02: After dissolving the above surfactant in a solvent, add silver salt to obtain a mixed solution;

[0022] S03: adding a reducing agent to the above mixed solution to carry out oxidation-reduction reaction to obtain a nano-silver particle solution;

[0023] S04: Centrifuge or / and pressurize the silver nanoparticle solution to obtain silver nanoparticle.

[0024] The preparation method of nano silver particles provided by the embodiment of the present invention has simple process, mild and controllable preparation conditions, low cost, and can be produced in batches. In this method, the active agent is firstly dissolved in the solvent and then mixed with the silver salt, so that the surfactant can be evenly ...

Embodiment 1

[0039] A kind of nano-silver particle, its preparation method comprises the steps:

[0040] S11: Raw materials provided in parts by weight: 50 parts of silver nitrate, 50 parts of silver bromate, 60 parts of hydrazine hydrate, 80 parts of polyvinylpyridone, and 800 parts of deionized water.

[0041] S12: Dissolve the polyvinylpyridone above in deionized water, and after treating for 15 minutes, add silver nitrate and silver bromate to obtain a mixed solution.

[0042] S13: After raising the temperature of the above mixed solution to 80° C., adding hydrazine hydrate to carry out oxidation-reduction reaction to obtain a nano-silver particle solution.

[0043] S14: Pressurize and filter the above nano-silver particle solution to obtain nano-silver particles, wherein the process of pressure-filtering treatment is: under the conditions of strong pressure of 0.1-0.3MPa and temperature of 32-40°C, use a filter with a pore size of 20nm Ceramic inorganic membrane filtration.

Embodiment 2

[0045] A kind of nano-silver particle, its preparation method comprises the steps:

[0046] S21: Raw materials provided in parts by weight: 40 parts of silver nitrate, 30 parts of silver bromate, 50 parts of hydrazine hydrate, 60 parts of polyvinylpyridone, and 500 parts of deionized water.

[0047] S22: Dissolving the above-mentioned polyvinylpyridinone in deionized water, and after treating for 15 minutes, adding silver nitrate and silver bromate to obtain a mixed solution.

[0048] S23: After raising the temperature of the above mixed solution to 50° C., adding hydrazine hydrate to carry out redox reaction to obtain a silver nano particle solution.

[0049] S24: Pressurize and filter the above-mentioned nano-silver particle solution to obtain nano-silver particles, wherein the process of pressure-filtering treatment is: under the conditions of strong pressure of 0.1-0.3MPa and temperature of 32-40°C, use a filter with a pore size of 20nm Ceramic inorganic membrane filtrati...

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Abstract

The invention belongs to the technical field of nano-materials and particularly relates to silver nanoparticles and a preparation method thereof. The preparation method comprises steps as follows: silver salt, a reducing agent, a surfactant and a solvent are provided; after the surfactant is dissolved in the solvent, the silver salt is added, and a mixed solution is obtained; the reducing agent isadded to the mixed solution for a redox reaction, and a silver nanoparticle solution is obtained; the silver nanoparticle solution is subjected to centrifugal treatment or / and pressure filtration treatment, and the silver nanoparticles are obtained. According to the preparation method of the silver nanoparticles, the technology is simple, preparation conditions are mild and controllable, the costis low, and batch production can be realized; and the finally-prepared silver nanoparticles have the characteristics of uniform particle size distribution and stable and good conductivity.

Description

technical field [0001] The invention belongs to the technical field of nano-materials, and in particular relates to a nano-silver particle and a preparation method thereof. Background technique [0002] Due to the continuous development of modern science and technology, nanomaterials are applied in more and more technical fields. Nano silver particles are widely used in biopharmaceuticals, light-emitting diodes, labels, solar energy, computer chips, coatings, aerospace, daily necessities, catalysts and other fields. The use of nano-silver particles as solar conductive silver paste has attracted great attention in the field of traditional printing silver paste, because the cost of silver is much lower than that of gold, and it has better environmental stability than copper. Conventional mainstream amorphous silicon in application fields such as ink paste and gravure silver paste has become a potential low-cost alternative technology. However, the conductive instability, prin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/054
Inventor 丁轶余雪玲雷震
Owner 珠海纳金科技有限公司
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