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A kind of preparation method of high-density homogeneous porous aluminum foam

A foamed aluminum and high-density technology is applied in the field of preparation of high-density uniform pore foamed aluminum, which can solve the problems of low porosity, good penetration rate and high cost, and achieve the effect of simple preparation steps.

Inactive Publication Date: 2018-06-12
廖川金
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: in view of the disadvantages of low porosity, small variation range, poor three-dimensional penetration and high cost in the existing preparation of foamed aluminum, a method is provided by air-drying the loofah and extracting it in a water bath to remove The organic matter is then modified with sodium hypochlorite to prepare loofah fibers, and then semi-hydrolyzed under the action of hemicellulase, and then the graphite is loaded onto the loofah fibers through a spray gun, and a porous mold is formed after drying and solidification. In the porous mold, the foamed aluminum material is prepared by standing and cooling. The foamed aluminum material prepared by the present invention has a higher porosity and a better penetration rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First collect the mature loofah, after it is naturally air-dried, peel it, wash and dry it, remove the inner seeds to get the loofah, then mix the loofah and toluene according to the mass ratio of 1:5 and put it in the Erlenmeyer flask. Extract in a water bath at 55°C for 5 hours, then filter and collect the filter cake, dry at 65°C for 6 hours to prepare loofah fibers; stir and mix the loofah fibers prepared above with deionized water at a mass ratio of 1:5, and placed in the Erlenmeyer flask, then dropwise add 1mol / L sodium hypochlorite solution with the same quality of toluene to the Erlenmeyer flask, and control the dropping time for 10min; Heat in a water bath at 70°C for 1 hour. After the heating is completed, filter it and collect the filter cake. Stir and mix the filter cake with a 5% hemicellulase solution at a mass concentration of 1:5, and then hydrolyze at 30°C. 1h, then filter and collect the filter cake to prepare semi-hydrolyzed loofah fiber; spray graphi...

example 2

[0019] First collect the mature loofah, after it is naturally air-dried, peel it, wash and dry it, remove the inner seeds to get the loofah, then mix the loofah and toluene according to the mass ratio of 1:5 and put it in the Erlenmeyer flask. Extract in a water bath at 58°C for 6 hours, then filter and collect the filter cake, dry at 72°C for 7 hours to prepare loofah fibers; stir and mix the loofah fibers prepared above with deionized water at a mass ratio of 1:5, and placed in the Erlenmeyer flask, then dropwise add 1mol / L sodium hypochlorite solution with the same quality of toluene to the Erlenmeyer flask, and control the dropping time for 12min; Heating in a water bath at 75°C for 1.5h. After the heating is completed, filter it and collect the filter cake. Stir and mix the filter cake with a mass concentration of 5% hemicellulase solution at a mass ratio of 1:5, and then heat at 32°C. Hydrolyze for 1.5 hours, then filter and collect the filter cake to prepare semi-hydrol...

example 3

[0021] First collect the mature loofah, after it is naturally air-dried, peel it, wash and dry it, remove the inner seeds to get the loofah, then mix the loofah and toluene according to the mass ratio of 1:5 and put it in the Erlenmeyer flask. Extract in a water bath at 65°C for 8 hours, then filter and collect the filter cake, dry at 80°C for 8 hours to prepare loofah fibers; stir and mix the loofah fibers prepared above with deionized water at a mass ratio of 1:5, and placed in the Erlenmeyer flask, then dropwise add 1mol / L sodium hypochlorite solution with the same quality of toluene to the Erlenmeyer flask, and control the dropping time for 15min; Heat it in a water bath at 80°C for 2 hours. After the heating is completed, filter it and collect the filter cake. Stir and mix the filter cake with a 5% hemicellulase solution at a mass concentration of 1:5, and then hydrolyze it at 35°C. 2h, then filter and collect the filter cake to prepare semi-hydrolyzed loofah fiber; spray...

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Abstract

The invention relates to a method for preparing foamed aluminum with high density and uniform pores, and belongs to the technical field of foamed aluminum material preparation. Aiming at the disadvantages of low porosity, small change range, poor three-dimensional penetration and high cost in the existing preparation of foamed aluminum, a method is provided by air-drying the loofah, extracting in a water bath to remove organic matter, and then modifying it with sodium hypochlorite. The loofah fiber is semi-hydrolyzed under the action of hemicellulase, and then graphite is loaded onto the loofah fiber through a spray gun. After drying and solidifying, a porous mold is formed, and the aluminum liquid is poured into the porous mold and left to cool. The aluminum foam material prepared by the present invention has a high porosity of more than 95%, a specific strength of more than 0.85×10‑3MPa·m3 / kg, simple preparation steps, and is environmentally friendly and pollution-free.

Description

technical field [0001] The invention relates to a method for preparing foamed aluminum with high density and uniform pores, and belongs to the technical field of foamed aluminum material preparation. Background technique [0002] Aluminum foam is a new type of functional material. It is a foam-like ultra-light metal material with numerous bubbles dispersed in the metal aluminum matrix. The general porosity is 40% to 98%. Until today, the United States, Japan, Britain, France, Canada and other countries have successively developed a number of technical patents. my country has also carried out some exploratory work on the basic research on the preparation process of foamed aluminum, and has made some progress. Aluminum foam has many excellent properties due to its unique structure. It not only has the lightweight properties of porous materials, but also has the excellent mechanical properties and thermal, electrical and other physical properties of metals. [0003] Since the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C1/02C22C21/00
CPCC22C1/026C22C1/08C22C21/00C22C1/081
Inventor 郭舒洋高玉刚
Owner 廖川金