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Ultrahigh specific surface area foam metal preparation method

A technology of ultra-high specific surface area and metal foam, applied in the field of metal foam preparation

Active Publication Date: 2018-08-28
无锡荣峻环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention aims to provide a method for preparing metal foam with ultra-high specific surface area. Based on the difference in diffusion rate of dissimilar metals in the process of interdiffusion at high temperature, the temperature is rapidly lowered when the diffusion is most intense, so that the diffusion reaction is rapid. Stop, so that the defects such as vacancies and holes left by incomplete diffusion are retained, forming ultra-high specific surface area metal foam

Method used

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  • Ultrahigh specific surface area foam metal preparation method
  • Ultrahigh specific surface area foam metal preparation method
  • Ultrahigh specific surface area foam metal preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Perform conductive treatment on 45PPI polyurethane foam to realize electrodeposition of nickel metal element, and obtain 45PPI bulk density of 0.3g / cm 3 Nickel foam with a specific surface area of ​​2000cm 2 / cm 3 . The nickel foam was heat-treated at 900° C. for 1 hour in a hydrogen atmosphere to remove polyurethane. Metal copper is then electrodeposited on the heat-treated nickel foam to obtain a 45PPI bulk density of 0.6g / cm 3 The foamed nickel-copper alloy was subjected to diffusion heat treatment for 8 hours at 800°C in a hydrogen reducing atmosphere, and then rapidly cooled to room temperature at a cooling rate of 10°C / min to obtain a 45PPI specific surface area of ​​6300cm 2 / cm 3 Compared with the original metal foam, the specific surface area of ​​the foamed nickel-copper alloy with ultra-high specific surface area has been increased by more than three times.

[0025] Obtain the surface morphology schematic diagram of foamed nickel-copper alloy in the pres...

Embodiment 2

[0027] Conduct conductive treatment on 100PPI polyurethane foam, and electrodeposit nickel metal element to obtain 100PPI bulk density of 0.15g / cm 3 Nickel foam with a specific surface area of ​​6500cm 2 / cm 3 . The nickel foam was heat-treated at 800° C. in a hydrogen atmosphere for 1.5 hours to remove polyurethane. Metal iron is then vapor-deposited on the heat-treated foamed nickel to obtain a bulk density of 0.22g / cm at 100PPI 3 foamed nickel-iron alloy. The nickel-iron foam was subjected to diffusion heat treatment at a temperature of 950°C for 10 hours in a hydrogen atmosphere, and then rapidly cooled to room temperature at a cooling rate of 10°C / min to obtain a specific surface area of ​​15,000 cm 2 / cm 3 Compared with the original metal foam, the specific surface area of ​​the nickel-iron alloy foam with ultra-high specific surface area has been increased by more than two times. The surface morphology of the foamed nickel-iron alloy prepared in this example is si...

Embodiment 3

[0029] Perform conductive treatment on 120PPI polyurethane foam, and electrodeposit copper metal element to obtain 120PPI bulk density of 0.18g / cm 3 Copper foam with a specific surface area of ​​6000cm 2 / cm 3 . Heat treatment was performed at a temperature of 700° C. for 3 hours in a hydrogen atmosphere to remove polyurethane. Metal iron is then electrodeposited on the heat-treated foamed copper to obtain a bulk density of 0.24g / cm at 120PPI 3 foamed copper-iron alloy. The foamed copper-iron alloy was subjected to diffusion heat treatment for 14 hours at a temperature of 980°C in a hydrogen atmosphere, and then rapidly cooled to room temperature at a cooling rate of 10°C / min to obtain a specific surface area of ​​18,500 cm 2 / cm 3 Compared with the original metal foam, the specific surface area of ​​the copper-iron alloy foam with ultra-high specific surface area has been increased by more than three times. The surface morphology of the foamed copper-iron alloy prepared...

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Abstract

The invention discloses an ultrahigh specific surface area foam metal preparation method. Firstly, electric conduction treatment is performed on polyurethane foam; at least one metal is electrically deposited; a foam metal base body is obtained; then, the obtained foam metal base body is subjected to hydrogen gas atmosphere heat treatment for removing polyurethane; next, a metal material differentfrom the foam metal base body is deposited on the foam metal base body; a foam metal alloy is obtained; the foam metal alloy is subjected to diffusion heat treatment under hydrogen gas reducing atmosphere; after the diffusion heat treatment is finished, fast cooling is performed; finally, the ultrahigh specific surface area foam metal alloy is obtained. On the basis of the diffusion rate difference of dissimilar metal in the high-temperature mutual diffusion process, fast temperature reduction is performed when the diffusion is the most acute, so that the diffusion reaction fast stops; the defects such as vacancies and holes reserved due to incomplete diffusion are reserved; the ultrahigh specific surface area foam metal is formed.

Description

technical field [0001] The invention relates to the technical field of metal foam preparation, in particular to a method for preparing foam metal with an ultra-high specific surface area. Background technique [0002] Foam metal material is an excellent functional environmental protection material, which integrates mechanical, thermal, electrical, acoustic and other properties, and has an irreplaceable important position in the field of materials. High porosity and high specific surface area are the structural characteristics and important characteristics of metal foam, and also the key properties that determine the obvious application advantages of metal foam in the fields of sound absorption and energy absorption, damping and noise reduction, electromagnetic shielding, filtration and separation. At present, the preparation of three-dimensional network open-cell metal foam mainly adopts the method of electrodeposition and vapor deposition, and the surface of the prepared me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/54C25D5/50C25D3/12C25D3/38C25D3/20C22C1/08
Inventor 钟一锋吴江明孙兆荣
Owner 无锡荣峻环保科技有限公司