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Foamed aluminum supercritical preparation method with controllable hole diameters

A foamed aluminum and supercritical technology, applied in the field of aluminum materials, can solve the problems of low production cost, inability to control and adjust structural parameters arbitrarily, and achieve the effects of low production cost, ensuring purity and surface cleanliness, and good adhesion

Active Publication Date: 2019-03-08
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems in the prior art, the present invention provides a supercritical preparation method of aluminum foam with controllable pore size, which completely solves the problem that the structural parameters cannot be controlled and adjusted arbitrarily; the preparation method is simple and is conducive to mass production, and the production Low cost; the prepared foamed aluminum has a stable and uniform pore structure, which improves the controllability of the pores

Method used

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  • Foamed aluminum supercritical preparation method with controllable hole diameters

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Effect test

Embodiment 1

[0029] A supercritical preparation method of aluminum foam with controllable pore size, comprising the steps of:

[0030] Step 1, adding ethyl cellulose to absolute ethanol and ultrasonicating for 5 minutes to obtain a dispersed alcohol solution;

[0031] Step 2, adding crushed aluminum chips into the dispersed alcohol solution and stirring for 20 minutes to obtain a suspension alcohol solution;

[0032] Step 3, flushing the supercritical carbon dioxide fluid into the suspension alcohol solution, reacting with microwave at constant pressure for 1 hour, and obtaining the mixed solution after settling;

[0033] Step 4, putting the mixed solution into a metal mold for heating and constant pressure reaction for 1 hour, then slowly constant temperature and pressure relief reaction for 2 hours, and cooling to obtain a foamed aluminum precursor after purging with nitrogen;

[0034] Step 5, subjecting the aluminum foam precursor to light decomposition reaction for 2 hours to obtain t...

Embodiment 2

[0044] A supercritical preparation method of aluminum foam with controllable pore size, comprising the steps of:

[0045] Step 1, adding ethyl cellulose to absolute ethanol and ultrasonicating for 10 minutes to obtain a dispersed alcohol solution;

[0046] Step 2, adding crushed aluminum chips into the dispersed alcohol solution and stirring for 50 minutes to obtain a suspension alcohol solution;

[0047] Step 3, flushing the supercritical carbon dioxide fluid into the suspension alcohol solution, reacting with microwave at constant pressure for 3 hours, and obtaining the mixed solution after settling;

[0048] Step 4, putting the mixed solution into a metal mold for heating and constant pressure reaction for 3 hours, then slowly constant temperature and pressure relief reaction for 4 hours, and cooling to obtain a foamed aluminum precursor after purging with nitrogen;

[0049] Step 5, subjecting the aluminum foam precursor to light decomposition reaction for 4 hours to obtai...

Embodiment 3

[0059] A supercritical preparation method of aluminum foam with controllable pore size, comprising the steps of:

[0060] Step 1, adding ethyl cellulose to absolute ethanol and sonicating for 8 minutes to obtain a dispersed alcohol solution;

[0061] Step 2, adding crushed aluminum chips into the dispersed alcohol solution and stirring for 40 minutes to obtain a suspension alcohol solution;

[0062] Step 3, flushing the supercritical carbon dioxide fluid into the suspension alcohol solution, reacting with microwave at constant pressure for 2 hours, and obtaining the mixed solution after settling;

[0063] Step 4, putting the mixed solution into a metal mold for heating and constant pressure reaction for 2 hours, then slowly constant temperature and pressure relief reaction for 3 hours, and cooling to obtain a foamed aluminum precursor after purging with nitrogen;

[0064] Step 5, subjecting the aluminum foam precursor to light decomposition reaction for 3 hours to obtain the ...

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Abstract

The invention belongs to the technical field of aluminum materials, and particularly relates to a foamed aluminum supercritical preparation method with controllable hole diameters. The method includesthe steps that 1, ethyecellulose is added into absolute ethyl alcohol for ultrasonic treatment for 5-10 min, and dispersive alcohol liquid is obtained; 2, broken aluminum skimmings are added into thedispersive alcohol liquid to be stirred for 20-50 min, and suspended alcohol liquid is obtained; 3, supercritical carbon dioxide fluid is flushed into the suspended alcohol liquid for a constant-pressure microwave reaction for 1-3 h, and mixed liquid is obtained after settling is completed; 4, the mixed liquid is put in a metal mold for a heating constant-pressure reaction for 1-3 h and a slow constant-temperature pressure relief reaction for 2-4 h, cooling is carried out after nitrogen purging, and a foamed aluminum precursor is obtained; and 5, the foamed aluminum precursor is subjected toan illumination decomposition reaction for 2-4 h, and a foamed aluminum material is obtained. The problems that structural parameters cannot be controlled or adjusted at will are completely solved; the preparation method is simple, batched production is facilitated, and the production cost is low; and the prepared foamed aluminum has a stable and uniform pore structure, and the pore controllability is improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum materials, and in particular relates to a supercritical preparation method of foamed aluminum with controllable pore size. Background technique [0002] Foamed aluminum is made by adding additives to pure aluminum or aluminum alloy and undergoes a foaming process. It has both metal and bubble characteristics. It has low density, high impact absorption ability, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtering ability, easy processing, easy installation, and high forming accuracy , Can carry out surface coating. Aluminum foam has excellent physical properties, chemical properties and mechanical properties as well as recyclability. These excellent properties of aluminum foam make it have broad application prospects in today's material field,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11B22F8/00
CPCB22F3/1121B22F8/00Y02W30/50
Inventor 李志彬
Owner SHAOXING UNIVERSITY
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