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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  • Abstract
  • Description
  • Claims
  • Application Information

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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 o

Method used

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  • Modified nano silver powder preparing method
  • Modified nano silver powder preparing method
  • Modified nano silver powder preparing method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018]

[0019] According to the above-mentioned mass percentage, add tert-butyl mercaptan, octadecyl mercaptan, 3-mercaptopropyl triethoxysilane, octadecyl dimethyl benzyl ammonium chloride, dodecyl trimethyl Base ammonium chloride, 4-hydroxybenzotriazole, benzotriazole, dichloromethane and acetone were added to absolute ethanol, under the effect 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 effect of ultrasonic dispersion with a frequency of 25kHz and a power of 2kW, and then sequentially go through centrifugal separation, washing with absolute ethanol, centrifugal separation, washing with deionized water, centrifugal separation, vacuum drying, and grinding And the sieving process to prepare modified nano silver powder.

Example Embodiment

[0020] Example 2

[0021]

[0022]

[0023] According to the above mass percentages, bromide n-butyl mercaptan, phenethyl mercaptan, 3-mercaptopropyltrimethoxysilane, dodecyltrimethylammonium bromide, and tetradecyldimethylpyridine in sequence Ammonium, cetyl dimethyl benzyl ammonium bromide, tolyl benzotriazole, ethylene glycol monoethyl ether, toluene and ethyl acetate are added to absolute ethanol at a frequency of 28kHz and a power of 2.5kW Under the action of ultrasonic dispersion, after stirring for 0.3h, add nano silver powder, and further 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 centrifugal separation, washing with absolute ethanol, centrifugal separation, and removing Ionized water washing, centrifugal separation, vacuum drying, grinding and sieving process to prepare modified nano silver powder.

Example Embodiment

[0024] Example 3

[0025]

[0026] According to the above mass percentages, sequentially add n-dodecyl mercaptan, n-pentyl mercaptan, 3-mercaptopropyl triethoxy silane, dodecyl dimethyl benzyl ammonium chloride, octadecyl tri Methyl ammonium bromide, N-hydroxybenzotriazole, benzotriazole, carbon tetrachloride and methyl ethyl ketone were added to absolute ethanol and stirred for 0.5 under the action of ultrasonic dispersion with a frequency of 60kHz and a power of 3kW After h, add nano-silver powder, and further stir for 4.0h under ultrasonic dispersion with a frequency of 60kHz and a power of 3kW, and then go through centrifugal separation, washing with absolute ethanol, centrifugal separation, washing with deionized water, centrifugal separation, and vacuum The process of drying, grinding and sieving prepares modified nano 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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