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Modified nano silver powder preparing method

A nano-silver powder, modified technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor compatibility, easy agglomeration of nano-silver powder, etc., and achieves low equipment investment and production technology. Simple and easy, low energy consumption effect

Active Publication Date: 2014-05-28
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The preparation method of a modified nano-silver powder according to the present invention provides a method for modifying the surface of the nano-silver powder with mercaptan, mercapto-containing silane coupling agent, cationic surfactant, corrosion inhibitor and organic solvent as raw materials. The method of preparing modified nano-silver powder solves the problem of easy aggregation of nano-silver powder and poor compatibility with other materials. The production process of this method is simple and easy, with small equipment investment, low energy consumption, no environmental pollution, and modified Nano-silver powder has a wide range of applications, is conducive to popularization and application, and has broad application prospects

Method used

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Effect test

Embodiment 1

[0018]

[0019] According to the above mass percentage, tert-butyl mercaptan, octadecyl mercaptan, 3-mercaptopropyl triethoxysilane, octadecyl dimethyl benzyl ammonium chloride, dodecyl trimethyl Ammonium chloride, 4-hydroxybenzotriazole, benzotriazole, dichloromethane and acetone were added to absolute ethanol, under the action of ultrasonic dispersion with a frequency of 25kHz and a power of 2kW, after stirring for 0.4h, Then add nano-silver powder, and further stir for 6.0h under the action of ultrasonic dispersion with a frequency of 25kHz and a power of 2kW, and then undergo centrifugation, anhydrous ethanol washing, centrifugal separation, deionized water washing, centrifugal separation, vacuum drying, and grinding and sieving process to prepare modified nano-silver powder.

Embodiment 2

[0021]

[0022]

[0023] According to the above mass percentage, n-butyl mercaptan, phenethyl mercaptan, 3-mercaptopropyltrimethoxysilane, dodecyltrimethylammonium bromide, and tetradecyllutidine were brominated sequentially Ammonium, cetyl dimethyl benzyl ammonium bromide, methyl benzotriazole, ethylene glycol monoethyl ether, toluene and ethyl acetate are added to absolute ethanol, and the frequency is 28kHz, the power is 2.5kW Under the action of ultrasonic dispersion, stir for 0.3h, then add nano-silver powder, and then stir for 5.0h under the action of ultrasonic dispersion with a frequency of 28kHz and a power of 2.5kW, and then go through centrifugation, absolute ethanol washing, centrifugation, and dehydration in sequence. The modified nano-silver powder is prepared through ion water washing, centrifugal separation, vacuum drying, grinding and sieving.

Embodiment 3

[0025]

[0026] According to the above mass percentage, n-dodecyl mercaptan, n-pentyl mercaptan, 3-mercaptopropyltriethoxysilane, dodecyldimethylbenzyl ammonium chloride, octadecyltri Add methylammonium bromide, N-hydroxybenzotriazole, benzotriazole, carbon tetrachloride and methyl ethyl ketone into absolute ethanol, and stir for 0.5 After h, add nano-silver powder, and then stir for 4.0 h under the action of ultrasonic dispersion with a frequency of 60 kHz and a power of 3 kW, and then successively undergo centrifugal separation, absolute ethanol washing, centrifugal separation, deionized water washing, centrifugal separation, vacuum Drying, grinding and sieving processes prepare the modified nanometer silver powder.

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Abstract

The invention discloses a modified nano silver powder preparing method. The method includes adopting thioalcohol, thiol-contained silane coupling agent, cationic surface active agent, corrosion inhibitor and organic solvent as raw materials, performing surface modification on the nano silver powder, and preparing and obtaining the modified nano silver powder; and the problems that the nano silver powder agglomerates easily and is poor in solubility after being combined with other materials are solved; the method is simple and practical in process, low in equipment investment, low in energy consumption and free of environment pollution, the applying range of the modified nano silver powder is broad, promotion and application are facilitated, and the method has promised application prospect.

Description

technical field [0001] The invention relates to a preparation method of modified nano-silver powder, which belongs to the field of nano-metal materials. Background technique [0002] Nanomaterials refer to materials that have at least one dimension in the three-dimensional space in the nanoscale range (1-100nm) or are composed of them as basic units. Because the structure of nanomaterials is different from that of conventional materials, the ratio of the surface atoms to the total number of atoms of nanomaterials increases sharply with the decrease of particle size, thus showing a strong volume effect (ie small size effect), quantum size effect , surface effect and macroscopic quantum tunneling effect make nanomaterials have special properties in terms of light, electricity, magnetism, thermodynamics and chemical reactions. It is an important functional material and has broad application prospects. In recent years, nanomaterials have attracted much attention, and nanomateri...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F9/16B82Y40/00B82Y30/00
Inventor 刘福生
Owner NANJING FORESTRY UNIV
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