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Method for preparing nano silver powder in viscous medium

A technology of nano-silver powder and medium is applied in the field of preparing nano-silver powder to achieve the effects of reducing migration rate, preventing agglomeration and preventing foaming

Inactive Publication Date: 2012-01-04
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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The preparation method has not been reported in the literature

Method used

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  • Method for preparing nano silver powder in viscous medium
  • Method for preparing nano silver powder in viscous medium
  • Method for preparing nano silver powder in viscous medium

Examples

Experimental program
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Effect test

Embodiment 1

[0026]

[0027] Preparation process: According to the above mass percentage, sodium lauryl sulfate, ammonium lauryl polyoxyethylene ether sulfate, coconut oil alkanolamide, lauryl dimethyl amine oxide, disodium edetate Salt, sodium carboxymethyl cellulose, potassium tartrate, simethicone, benzotriazole and deionized water are mixed and stirred evenly to prepare a viscous medium, added silver fluoride and stirred evenly, added formaldehyde and stirred until the reaction is complete , then according to the ratio of 1: 1.3 of the mass ratio of all the above-mentioned total amount of materials to deionized water, add deionized water to dilute to reduce the viscosity, and obtain nano-silver powder through pressure filtration, deionized water washing, acetone washing and vacuum drying, The press filtrate is concentrated and recycled.

Embodiment 2

[0029]

[0030] Preparation process: According to the above mass percentage, lauryl sulfate monoethanolamine salt, sodium lauryl polyoxyethylene ether sulfate, coconut oil alkanolamide, lauryl amidopropyl betaine, sodium polymethacrylate, ethylene glycol Amine tetraacetic acid disodium salt, ammonium tartrate, polyoxypropyl polyoxyethyl glyceryl ether, tolyl benzotriazole and deionized water are mixed and stirred evenly to prepare a viscous medium, and silver nitrate is added to stir evenly, and formaldehyde is added Stir with glucose until the reaction is complete, then add deionized water to dilute the viscosity according to the mass ratio of all the above-mentioned total materials and deionized water in a ratio of 1: 1.4, press filter, wash with deionized water, wash with acetone and Nano-silver powder is obtained by vacuum drying, and the filtrate is concentrated and recycled.

Embodiment 3

[0032]

[0033]

[0034] Preparation process: According to the above mass percentage, sodium cetyl sulfonate, sodium ammonium nonylphenol polyoxyethylene ether sulfate, triethanolamine lauryl polyoxyethylene ether sulfate, coconut oil alkanolamide, coconut oil amide Propyl betaine, sodium polyacrylate, ethylenediaminetetraacetic acid disodium salt, sodium tartrate, polyoxypropyl polyoxyethyl glyceryl ether, N-hydroxybenzotriazole and deionized water are mixed and stirred evenly to prepare For viscous medium, add silver perchlorate and stir evenly, add sodium hypophosphite and stir until the reaction is complete, then add deionized water to dilute the The viscosity is reduced, and the nano-silver powder can be obtained through press filtration, deionized water washing, acetone washing and vacuum drying, and the press filtrate can be recycled after being concentrated.

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Abstract

The invention discloses a method for preparing nano silver powder in viscous medium. The method comprises the following steps of: mixing sodium nonylphenol polyoxethyiene ether sulfate, TEA dodecylbenzenesulfonate, ammonium dodecylbenzenesulphonate, coconut oil alcohol acylamide, octadecyl dimethyl amine oxide, sodium carboxymethylcellulose, polyoxyethylene glycol 6000 bisstearate, ethylenediamine tetraacetic acid disodium salt, ethylene oxide, benzotriazole and deion water and stirring uniformly, preparing the viscous medium, adding silver acetate and silver lactate and stirring uniformly, adding sodium hypophosphite and stirring till full reaction, then adding the deion water for dilution according to a ratio of 1:1.5 of the all material amount to the deion water, reducing the viscosity, and obtaining the nano silver powder by pressure filtration, washing with the deionized water, washing with acetone and vacuum drying. The selected raw materials are easily obtained; the method is short in production process, high in production efficiency, low in production cost and low in energy consumption; the powder is not easily agglomerated, and the powder has good dispersibility; and the method is suitable for large-scale production, and solves the problems that the nano silver powder prepared by the conventional chemical preparation method is easily oxidized and easily agglomerated.

Description

technical field [0001] The invention relates to a method for preparing nano-silver powder in a viscous medium, belonging to the field of nano-metal materials. Background technique [0002] Due to the effects of quantum size effect, surface effect, small size effect and macroscopic quantum tunneling effect, nano-metallic materials present singular properties in chemical and physical properties such as melting point, magnetism, optics, heat, electricity, and mechanics. At present, nano-metal materials have been widely used in high-tech fields such as high-density magnetic recording, wave-absorbing stealth, magnetic fluid, radiation protection, chips, microelectronics, optoelectronics, high-efficiency catalysts, sensitive components, new lasers, and superconductivity. A class of new materials with broad application prospects. Nano-silver powder is one of many nano-metal materials, and it is an important raw material for the production of industrial products such as conductive ...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 刘福生
Owner NANJING FORESTRY UNIV
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