Metallic foam body with controlled grain size on its surface, process for its production and use thereof

A metal foam and foam technology, which is applied in the field of metal foam, can solve the problems such as the reduction of the catalytic activity of the silver catalyst and the increase of the size of the silver crystal grains.

Active Publication Date: 2015-06-10
ALANTUM OJROPE GMBKH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because under the high temperature of 700 ℃ of carrying out described formaldehyde synthesis process, the grain size of silver increases, causes the catalytic activity of silver catalyst to reduce

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0078] First, a metal foam was prepared by providing a 1.6 mm porous polyurethane foam sheet having an average porosity of 450 µm. The polyurethane foam was subjected to sputter plating of Ni (or Ag) to make the polyurethane foam conductive. Silver is then electroplated with an average thickness of 20 μm. Next, the polyurethane foam was burned in air at 700°C. After burning off the polyurethane foam, the grain size increased beyond that obtained directly after depositing the silver layer. Then, a second silver layer with an average thickness of 20 μm is plated. The grain size of the final metal foam is similar to that obtained directly after depositing the silver layer before burning off the polyurethane foam.

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PUM

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Abstract

The invention relates to a metallic foam body, comprising (a) a metallic foam body substrate made of at least one metal or metal alloy A; and (b) a layer of a metal or metal alloy B present on at least a part of the surface of the metallic foam body substrate (a), wherein A and B differ in their chemical composition and / or in the grain size of the metal or metal alloy; obtainable by a process comprising the steps (i) provision of a porous organic polymer foam; (ii) deposition of at least one metal or metal alloy A on the porous organic polymer foam; (iii) burning off of the porous organic polymer foam to obtain the metallic foam body substrate (a); and (iv) deposition by electroplating of the metallic layer (b) of a metal or metal alloy B at least on a part of the surface of the metallic foam body (a). The invention moreover relates to a process for the production of the metallic foam body and a use of the metallic foam body.

Description

technical field [0001] The present invention relates to a metal foam body with grains of controlled size on its surface, its preparation method and use. In particular, the present invention relates to a metal foam comprising (a) a metal foam substrate made of at least one metal or metal alloy A; and (b) a metal foam substrate on the surface of (a) A layer of metal or metal alloy B present on at least a part of the metal or metal alloy A and B, wherein the chemical composition and / or grain size of the metal or metal alloy A and B are different; the preparation method and use of the metal foam. Background technique [0002] It is known that metal foams can act as catalyst precursors or as catalysts. In fact, the potential advantages of metal foams as catalyst supports or catalysts have been the subject of intense attention in the field of chemistry. Some of the characteristics of these metal foams are: larger interfacial area to facilitate mass and heat transfer, higher ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B5/18C23F17/00B01J20/02B01J20/28B01J23/00
CPCB22F3/1137B22F7/002C22C1/08C23C14/0005C23C14/046C23C14/205B32B15/046B32B15/018C25D1/08C25D5/10B32B15/01C25D5/617B32B15/043B32B15/20C23C14/34C23C14/5873C25D3/46C25D5/34C25D5/623B22F3/11B22F7/00C25D3/00C23C14/5846
Inventor R·波斯S·萨别里F·戴塞尔
Owner ALANTUM OJROPE GMBKH
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