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Metal/carbonyl composite foaming material and preparation method thereof

A composite foam and foam plastic technology, applied in the field of metal foam materials, can solve the problems of increased electroplating cost, high processing cost, and difficulty in special-shaped workpieces, and achieve the effects of reduced electroplating cost, good processability, and low process complexity

Inactive Publication Date: 2008-01-16
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Because the foam plastic substrate is soft, easy to deform, and has poor precision processability, the molding process can only be carried out after the electroplating is thickened.
During the processing, a large amount of metal foam is cut off as leftover material, resulting in a large waste, while increasing the cost of electroplating directly leads to an increase in the cost of metal foam products;
[0006] 2. The modulus of metal foam is low, and it cannot be formed by common processing methods such as milling, grinding, turning, and drilling. Only expensive processing methods such as wire cutting can be used, and the processing cost is high;
[0007] 3. Due to the limitation of processing methods, it is difficult to make special-shaped workpieces with foam metal obtained by this process, which cannot meet the requirements for special structures in some applications.
[0008] The above-mentioned deficiencies make the popularization and application of metal foam subject to certain restrictions

Method used

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  • Metal/carbonyl composite foaming material and preparation method thereof
  • Metal/carbonyl composite foaming material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The preparation process of the metal / carbon-based composite foam material in this embodiment is as follows:

[0041] 1. Preparation of foamed carbon:

[0042] a, cutting the polyurethane foam (average aperture 2mm) of suitable shape for subsequent use;

[0043] B, with weight ratio phenolic resin: carbon powder: the ratio preparation slurry of alcohol=2: 1: 2 and ball milling 0.5 hour;

[0044] c. Immerse the foamed plastic into the slurry obtained in b for 10 seconds to ensure that the slurry and the foamed plastic are in full contact, then take it out, blow off the excess slurry with compressed air, and then dry it;

[0045] d. Repeat the process of c until the required weight is reached;

[0046] e. Under a nitrogen protective atmosphere, the temperature was raised to 800° C. at a rate of 2° C. / min, and kept at a temperature of 0.5 hour, and the polyurethane foam was removed to obtain a foamed carbon blank. In this embodiment, the structure of the carbon foam is a...

Embodiment 2

[0052] The difference from Example 1 is:

[0053] The preparation process of the carbon foam blank of this embodiment is as follows:

[0054] a, cutting the polyurethane foam (average aperture 2mm) of suitable shape for subsequent use;

[0055] B, with weight ratio phenolic resin: carbon powder: the ratio preparation slurry of alcohol=2: 2: 6 and ball milling 2 hours;

[0056] c. Soak the foamed plastic in the slurry obtained in b for 50 seconds to ensure that the slurry and the foamed plastic are in full contact, then take it out, blow off the excess slurry with compressed air, and then dry it;

[0057] d. Repeat the process of c until the required weight is reached;

[0058] e. Pyrolysis. Under protective atmosphere such as nitrogen or argon, the temperature is raised to 1000° C. at a rate of 3° C. / min and kept for 60 minutes to remove polyurethane foam to obtain a foamed carbon blank. In this embodiment, the structure of the foamed carbon is a three-dimensional interconnec...

Embodiment 3

[0061] The sample after copper electroplating in Example 1 was taken and electroplated in a zinc plating solution. The ratio of electro-galvanizing is: zinc chloride 75 g / l, potassium chloride 220 g / l, boric acid 30 g / l. Process conditions: pH 5.2, temperature 30°C, current density 4 amps / dm2, electroplating time 10 minutes, the zinc content in the obtained zinc / carbon-based foam composite material is 0.1-0.12 g / ml.

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Abstract

The invention relates to the field of foamed metal materials, specifically metal / carbon-based composite foamed material and the preparation method thereof. The preparation method comprises processing a foamed carbon blank from foamed plastic as matrix, and forming a metal coating on the foamed carbon by direct electroplating method after the foamed carbon is molded to obtain a metal / carbon-based composite foamed material. The composite foamed material is constituted by foamed carbon and metal coating thereon. The ratio of carbon to metal, by weight percentage, is (20-90):(80-10). In this invention, the metal coating is formed uniformly and continuously on the surface of the foamed carbon matrix by electroplating method, so as to obtain a novel metal / carbon-based composite foamed material; and the toughness and heat conduction capacity of material are improved greatly without changing the appearance of foamed carbon. The inventive metal / carbon-based composite foamed material can not only used as an electronic element in radiator but also a heat exchanger for industrial and domestic uses, additionally can be used as electrode, electronic shield, catalyst and catalyst carrier in automobile, chemical and aerospace industries.

Description

Technical field: [0001] The invention relates to the field of metal foam materials, in particular to a metal / carbon-based composite foam material and a preparation method thereof. Background technique: [0002] Metal foam has a three-dimensional connected network structure, high porosity, large specific surface area, and low density. It is an ideal material for making new heat exchangers, chemical catalysts, electrodes, and electronic shielding equipment. It has broad applications in the fields of electronics, chemicals, and aerospace. application prospects. [0003] The metal deposition method on the surface of foamed plastics is currently the most widely used method for preparing foamed metals. This method takes foamed plastics as the substrate and undergoes many processes such as roughening, activation, sensitization, electroless plating, electroplating thickening, degumming, reduction, sintering, and processing. The metal foam is produced in two steps, and the obtained ...

Claims

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Application Information

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IPC IPC(8): C22C1/08
Inventor 张劲松杨振明曹小明田冲
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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