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Method for preparing nanometer silver powder by using <60>Co-gamma rays in aqueous solution

A nano-silver powder and γ-ray technology, which is applied in the field of powder materials prepared by nuclear radiation technology, can solve the problems of easy agglomeration, limited silver powder use effect, silver powder particle size, irregular shape, etc., to achieve short production cycle, prevent oxidation and build up block, method is simple and easy to implement

Inactive Publication Date: 2009-12-30
浙江省技术物理应用研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problem is that the prepared silver powder has irregular particle size and shape, and is easy to agglomerate, which limits the use effect of silver powder.

Method used

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  • Method for preparing nanometer silver powder by using &lt;60&gt;Co-gamma rays in aqueous solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] used in aqueous solution 60 Co-gamma rays prepare the method for nanometer silver powder, comprise the following steps:

[0017] 1) Silver sulfate, isoamyl alcohol and hydroxymethyl cellulose are dissolved in distilled water, stirred and mixed evenly, the content of silver sulfate in the mixed solution is 12g / L, the content of isoamyl alcohol is 130g / L, and the content of hydroxymethyl cellulose is 10g / L, adjust the pH value of the mixture to 5 with sodium hydroxide;

[0018] 2) Put the mixed solution of step 1) into an aluminum-plastic packaging bag and fill it with helium for 3 minutes, discharge the dissolved oxygen in the solution, vacuumize and seal the package with a liquid vacuum packaging machine, and use 60 Co-γ rays were irradiated for reduction, and the irradiation dose was 20kGy.

[0019] 3) Pour the solution treated in step 2) into a beaker, add oleic acid amide for oil-water coating, the content of oleic acid amide is 20g / L. Then use a vacuum suction fi...

Embodiment 2

[0022] 1) Dissolve silver sulfate, n-butanol and hydroxymethyl cellulose in distilled water, stir and mix evenly, the content of silver sulfate in the mixed solution is 80g / L, the content of n-butanol is 150g / L, and the content of hydroxymethyl cellulose is 15g / L, adjust the pH value of the mixture to 7 with sodium hydroxide;

[0023] 2) Put the mixed solution of step 1) into an aluminum-plastic packaging bag and inflate it with helium for 10 minutes, discharge the dissolved oxygen in the solution, vacuumize and seal the package with a liquid vacuum packaging machine, and use 60 Co-γ rays were irradiated for reduction, and the irradiation dose was 50kGy.

[0024] 3) Pour the solution treated in 2) into a beaker, add oleic acid amide for oil-water coating, the content of oleic acid amide is 30g / L. Then use a vacuum suction filter to filter with water, and repeatedly wash the filter membrane in the suction filter with acetone and distilled water alternately to remove organic im...

Embodiment 3

[0027] 1) Dissolve silver chloride, isoamyl alcohol and sodium alginate in distilled water, stir and mix evenly, the content of silver chloride in the mixed solution is 100g / L, the content of isoamyl alcohol is 120g / L, and the content of sodium alginate is 30g / L L, adjust the mixed solution pH value to be 6 with potassium hydroxide;

[0028] 2) Put the mixed solution of step 1) into an aluminum-plastic packaging bag and inflate it with helium for 7 minutes, discharge the dissolved oxygen in the solution, vacuumize and seal the package with a liquid vacuum packaging machine, and use 60 Co-γ rays were irradiated for reduction, and the irradiation dose was 35kGy.

[0029] 3) Pour the irradiated solution in 2) into a beaker, add dodecanethiol for oil-water coating, and the content of oil dodecanethiol is 20 g / L. Then use a vacuum suction filter to filter with water, and repeatedly wash the filter membrane in the suction filter with acetone and distilled water alternately to remov...

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Abstract

The invention discloses a method for preparing nanometer silver powder by using <60>Co-gamma rays in aqueous solution, comprising the following steps: dissolving silver salt, active particle trapping agents and surfactants into distilled water, stirring and mixing the components evenly and regulating pH value to 5-7; placing mixed liquor into an aluminum-plastic package and introducing helium, vacuumizing, sealing and packing the package and using the <60>Co-gamma rays for radiation reduction; adding oleamide or dodecyl mercaptans into solution treated by radiation, then using a water vacuum filter for filtration, repeatedly washing filter membranes in the filter by acetone and the distilled water alternately, taking out the filter membranes and immersing the filter membranes into a beaker with anhydrous ethanol, and using ultrasonic waves to collect the silver powder in the filter membranes; vacuum-freezing and drying the silver powder to obtain the nanometer silver powder. The method is convenient in operation and short in production cycle, can carry out continuous production,without environmental pollution. The prepared nanometer silver powder is not easy to oxidize and has granularity between 10-50nm.

Description

technical field [0001] The invention relates to a method for preparing powder materials by nuclear radiation technology, in particular to a method for preparing nano-silver powder by nuclear radiation technology. Background technique [0002] Nano-silver is an emerging functional material widely used in superconducting, chemical, medical, optical, and electronic and electrical industries. Adding a small amount of nano-silver in chemical fiber can change some properties of chemical fiber and endow it with strong bactericidal ability. Nano-silver powder has strong electrical conductivity and can be used as conductive silver paste in integrated circuits and battery electrode materials. In view of the wide range of applications above, the preparation of nano-silver is of great significance, and its preparation method has attracted great attention from researchers at home and abroad. [0003] There are many ways to prepare nano-silver powder, including chemical oxidation-reducti...

Claims

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Application Information

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IPC IPC(8): B22F9/30B22F9/24
Inventor 刘亚建傅俊杰谭瑗瑗章月红徐芙蓉
Owner 浙江省技术物理应用研究所
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