Preparation method of whole continuous nano-porous copper

A nano-porous copper and monolithic technology, applied in the field of nano-material preparation, can solve the problems that Zr cannot be corroded, and achieve the effect of simple operation process and suitable for large-scale industrial production

Inactive Publication Date: 2009-12-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Zr cannot be corroded away in the corresponding bulk alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) According to the ratio of 30% Cu at atomic percentage and the rest being Al, the Al-Cu alloy is put into a smelting furnace and heated to a molten state, and it is alloyed after sufficient stirring. Use argon to quickly blow out the molten liquid under a pressure of 0.1MPa, and quickly solidify it on a high-speed rotating copper roller with a cooling rate of 10 3 -10 5 K / s to obtain alloy strips with a thickness of 20-40 microns, a width of 2-5 mm, and a length of 1-5 cm.

[0015] (2) react in 5wt.% hydrochloric acid solution at 85° C. for 1 hour, stop heating until no obvious reaction bubbles are produced.

[0016] (3) Collect the reacted product, rinse it repeatedly with distilled water until the chemical corrosion solution is completely cleaned (extensive pH test paper checks that the rinsed distilled water is neutral). Then dry and store at 25°C. The sample has a porous distribution and consists of particles of 100-1000 nm.

Embodiment 2

[0018] (1) According to the ratio of 40 atomic percent Cu and the rest being Al, the Al-Cu alloy is put into a smelting furnace and heated to a molten state, and it is alloyed after sufficient stirring. Use nitrogen to blow out the molten liquid rapidly under the pressure of 0.5MPa, and chill it on a high-speed rotating copper roller with a cooling rate of 10 4 -10 5 K / s to obtain alloy strips with a thickness of 30-50 microns, a width of 2-5 mm, and a length of 5-20 cm.

[0019] (2) Reaction in 10wt.% hydrochloric acid solution at 95° C. for 2 hours, no obvious reaction bubbles were produced, and the heating was stopped.

[0020] (3) Collect the reacted product, rinse it repeatedly with distilled water until the chemical corrosion solution is completely cleaned (extensive pH test paper checks that the rinsed distilled water is neutral). Then dry and store at 25°C. The nanoporous copper is composed of nano particles of 100-200nm and ligaments of 100-300nm.

Embodiment 3

[0022] (1) According to the ratio of 40 atomic percent Cu and the rest being Al, the Al-Cu alloy is put into a smelting furnace and heated to a molten state, and it is alloyed after sufficient stirring. Use argon to quickly blow out the molten liquid under the pressure of 1MPa, so that the molten liquid metal is solidified in the metal copper mold, and the cooling speed is 1-10 2 K / s, prepare an alloy sheet with a thickness of 1 mm, a width of 5 mm, and a length of 4 cm, or an alloy rod with a diameter of 1 mm and a length of 6 cm.

[0023] (2) React in 20wt.% sodium hydroxide solution at room temperature for 5 hours, then wash the alloy in distilled water until neutral, and then react with 5wt.% hydrochloric acid solution at 90°C for 15 hours.

[0024] (3) Collect the reacted product, rinse it repeatedly with distilled water until the chemical corrosion solution is completely cleaned (extensive pH test paper checks that the rinsed distilled water is neutral). Then dry and st...

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Abstract

The invention relates to a preparation method of whole continuous nano-porous copper, comprising the following steps: (1) heating the pure metallic aluminum and copper to the molten state, stirring and mixing the mixture to form Cu-Al alloy liquid; (2) fast blowing the alloy liquid out with inert gas to solidify the molten liquid metal on the copper rollers which rotate in high speed and prepare alloy strips, or solidify the molten liquid metal in copper molds to prepare alloy plates or alloy bars; and (3) performing dealloying process to the obtained alloy, cleaning the alloy in the distilled water to be neutral and airing the alloy to obtain nano-porous copper. The beneficial effects of the invention are as follows: (1) the produced nano-porous copper is whole continuous and whole continuous nanosize bulk materials can also be prepared; (2) low concentration of corrosion solution is used to prepare nano-porous copper in the method of the invention, and the operation process is simple and the method is suitable for large-scale industrialized production; and (3) according to the components of the mother alloy and the types of corrosion solution, the structure and size of nanoporous copper can be regulated.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of nanomaterials, and in particular relates to a preparation method of integral continuous nanoporous copper. Background technique [0002] Nanoporous metal is a special material with nanometer-sized pores, and its pore size is several nanometers to tens of nanometers. The nanoscale pore size makes it have a higher specific surface area and other unique physical, chemical and mechanical properties. Such as unique electromagnetic properties, higher chemical activity, higher strength, etc. Therefore, nanoporous metals have great application potential, and the current applied research mainly includes catalysis, excitation, sensing, surface-enhanced Raman scattering, etc. The currently used nanoporous copper is mainly the Raney copper (U.S. Patent No. 1563587) catalyst in the water vapor shift reaction, and the original alloy range generally has a copper content of not more than 50wt.%. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/00B22D11/06C23F1/44
Inventor 王艳祁振张忠华
Owner UNIV OF JINAN
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