A foamed aluminum sound-absorbing panel that can effectively reduce urban traffic noise and its preparation method

A technology for urban transportation and aluminum foam, which is applied in chemical instruments and methods, metal processing equipment, transportation and packaging, etc. Improve through-hole porosity, uniform through-hole pore size, and reduce urban traffic noise

Active Publication Date: 2021-01-15
常州市驰义塑胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides an aluminum foam sound-absorbing panel that can effectively reduce urban traffic noise and its preparation method, which has the advantages of increasing the porosity of the through holes, reducing the aperture of the through holes and significantly improving the sound absorption coefficient, etc., and solves the problem of The existing aluminum foam materials have the technical problems of uneven hole size, large hole diameter and low hole porosity.

Method used

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  • A foamed aluminum sound-absorbing panel that can effectively reduce urban traffic noise and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040](1) Add 35 parts by mass of aluminum chips to 35 parts by mass of absolute ethanol, mix and stir uniformly, soak for 20 minutes, and wash the filtered aluminum chips with 50 parts by mass of ultrapure water, and place them in a vacuum drying oven. After drying for 60 minutes at a temperature of 100°C, take it out, then add aluminum scraps to 35 parts by mass of absolute ethanol and soak for 40 minutes to obtain aluminum scrap alcohol solution;

[0041](2) Add the alcohol solution of aluminum chips obtained in step (1) to 60 parts by mass of deionized water at a stirring speed of 300r / min, stir at room temperature for 10 minutes, and then add 12 parts by mass of dispersant, namely coke 1 part of sodium phosphate, 1 part of sodium metasilicate, 3 parts of sodium polyethylene glycol alkyl aryl ether sulfonate, 2 parts of polyvinylpyrrolidone, and 5 parts of polyethylene glycol. After fully stirring and mixing at room temperature, Using an ultrasonic frequency of 20kHz and an ultraso...

Embodiment 2

[0047](1) Add 40 parts by mass of aluminum chips to 50 parts by mass of absolute ethanol, mix and stir evenly, soak for 25 minutes, and wash the filtered aluminum chips with 75 parts by mass of ultrapure water, and place them in a vacuum drying oven. After drying for 70 minutes at a temperature of 105°C, take it out, then add aluminum scraps to 50 parts by mass of absolute ethanol and soak for 50 minutes to obtain aluminum scrap alcohol solution;

[0048](2) Add the alcohol solution of aluminum chips obtained in step (1) to 70 parts by mass of deionized water at a stirring speed of 320r / min, stir at room temperature for 10 minutes, and then add 17 parts by mass of dispersant, namely coke 2 parts of sodium phosphate, 2 parts of sodium metasilicate, 4 parts of sodium polyethylene glycol alkyl aryl ether sulfonate, 4 parts of polyvinylpyrrolidone, and 5 parts of polyethylene glycol. After fully stirring and mixing at room temperature, Using an ultrasonic frequency of 24kHz and an ultrason...

Embodiment 3

[0054](1) Add 50 parts by mass of aluminum chips to 50 parts by mass of absolute ethanol, mix and stir uniformly, soak for 30 minutes, and wash the filtered aluminum chips with 75 parts by mass of ultrapure water and place them in a vacuum drying oven. After drying for 80 minutes at a temperature of 110°C, take it out, then add aluminum scraps to 50 parts by mass of absolute ethanol and soak for 60 minutes to obtain aluminum scrap alcohol solution;

[0055](2) Add the alcohol solution of aluminum chips prepared in step (1) to 70 parts by mass of deionized water at a stirring speed of 350r / min, stir at room temperature for 10 minutes, and then add 22 parts by mass of dispersant, namely coke 3 parts of sodium phosphate, 3 parts of sodium metasilicate, 5 parts of sodium polyethylene glycol alkyl aryl ether sulfonate, 5 parts of polyvinylpyrrolidone, and 6 parts of polyethylene glycol. After fully stirring and mixing at room temperature, Using an ultrasonic frequency of 25kHz and an ultras...

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Abstract

The invention discloses an aluminum foam sound-absorbing panel that can effectively reduce urban traffic noise. It comprises an aluminum plate body, and foamed aluminum materials are pasted on both sides of the aluminum plate body. The foamed aluminum material includes the following raw materials: aluminum chips, deionized Water, ultrapure water, absolute ethanol, dispersant, plasticizer, adhesive, foaming agent; the adhesive is composed of the following raw materials: starch, polyvinyl alcohol, polyurethane, butyl rubber, vinyl acetate resin, water-based Silicone epoxy resin; blowing agent consisting of the following raw materials: azodicarbonamide, sodium bicarbonate, carbon black, n-hexane, trichlorofluoromethane, sodium lauryl sulfate; through-hole porosity of aluminum foam material 98.5%-99.8%, the average hole diameter is 0.75-0.85mm; the thickness of the foamed aluminum material pasted on both sides of the aluminum plate body is 20-25mm; the sound absorption coefficient of the foamed aluminum sound-absorbing board is 0.88-0.92. The invention solves the technical problems of non-uniform through-hole diameter, large through-hole diameter and low through-hole porosity in the existing aluminum foam material.

Description

Technical field[0001]The invention relates to the technical field of new materials, in particular to a foamed aluminum sound-absorbing board for effectively reducing urban traffic noise and a preparation method thereof.Background technique[0002]With the development of economy, the expansion of urbanization, the rapid development of traffic arteries, the rapid increase of the number of motor vehicles in the city, and the traffic noise has increasingly become the main noise of the city.[0003]Porous metal is composed of a metal framework and pores, and has basic metal properties such as the weldability of metal materials. Compared with dense metal materials, the distinguishing feature of porous metal is its large number of pores. The large number of internal pores makes porous metal materials have many excellent characteristics. Porous organic polymer materials have low strength and are not resistant to high temperatures, while porous ceramics are brittle and not resistant to thermal s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B7/12B32B5/18B32B15/20B32B15/04B22F1/00B22F3/11
CPCB22F3/1125B22F3/1137B32B5/18B32B15/046B32B15/20B32B2266/045B32B2307/102B22F1/103B22F1/10
Inventor 段国凡
Owner 常州市驰义塑胶制品有限公司
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