Foamed aluminum sound-absorbing plate capable of effectively reducing urban traffic noises and preparation method thereof

Abstract

The invention discloses a foamed aluminum sound-absorbing plate capable of effectively reducing urban traffic noises. The foamed aluminum sound-absorbing plate comprises an aluminum plate body, wherein foamed aluminum materials are adhered to the two side surfaces of the aluminum plate body; the foamed aluminum material comprises the following raw materials: aluminum scrap, deionized water, ultrapure water, absolute ethanol, a dispersant, a plasticizer, an adhesive and a foaming agent; the adhesive comprises the following raw materials: starch, polyvinyl alcohol, polyurethane, butyl rubber, vinyl acetate resin and waterborne organosilicone epoxy resin; the foaming agent comprises the following raw materials: azodicarbonamide, sodium hydrogen carbonate, carbon black, n-hexane, trichlorofluoromethane and sodium lauryl sulfate; the foamed aluminum material has the through hole porosity of 98.5-99.8% and the average through hole size of 0.75-0.85mm; the foamed aluminum materials adhered tothe two side surfaces of the aluminum plate body have the thickness of 20-25mm; the foamed aluminum sound-absorbing plate has the sound-absorbing coefficient of 0.88-0.92. The technical problems of nonuniform through pore size, relatively large through hole size and relatively low through hole porosity of the existing foamed aluminum material are solved.

Description

technical field

[0001] The invention relates to the technical field of new materials, in particular to a foamed aluminum sound-absorbing panel for effectively reducing urban traffic noise and a preparation method thereof. Background technique

[0002] With the development of economy, the expansion of urbanization scale, the rapid development of traffic arteries, the rapid increase of the number of motor vehicles in the city, the traffic noise has increasingly become the main noise of the city.

[0003] Porous metal is composed of metal skeleton and pores, and has basic metal properties such as weldability of metal materials. Compared with dense metal materials, the remarkable feature of porous metals is that they have a large number of pores inside. And a large number of internal pores make porous metal materials have many excellent properties. Porous organic polymer materials have low strength and are not resistant to high temperatures, while porous ceramics are brittle a...

Examples

Embodiment 1

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

[0041] (2) Add the alcohol solution of aluminum chips prepared in step (1) to 60 parts by mass of deionized water at a stirring speed of 300r / min, stir at room temperature for 10min, then add 12 parts by mass of a 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, 5 parts of polyethylene glycol, after fully stirring and mixing at room temperature, The aluminum chips are uniformly dispers...

Embodiment 2

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

[0048] (2) Add the aluminum chip alcohol solution prepared in step (1) to 70 parts by mass of deionized water, the stirring speed is 320r / min, stir at room temperature for 10min, and then add 17 parts by mass of dispersant, i.e. 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, 5 parts of polyethylene glycol, after fully stirring and mixing at room temperature, The aluminum chips are uniformly dispersed into t...

Embodiment 3

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

[0055] (2) Add the aluminum chip alcohol solution prepared in step (1) to 70 parts by mass of deionized water, the stirring speed is 350r / min, stir at room temperature for 10min, and then add 22 parts by mass of a dispersant, i.e. 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, 6 parts of polyethylene glycol, after fully stirring and mixing at room temperature, The aluminum chips are uniformly dispersed into...

technical field

[0001] The invention relates to the technical field of new materials, in particular to a foamed aluminum sound-absorbing panel for effectively reducing urban traffic noise and a preparation method thereof. Background technique

[0002] With the development of economy, the expansion of urbanization scale, the rapid development of traffic arteries, the rapid increase of the number of motor vehicles in the city, the traffic noise has increasingly become the main noise of the city.

[0003] Porous metal is composed of metal skeleton and pores, and has basic metal properties such as weldability of metal materials. Compared with dense metal materials, the remarkable feature of porous metals is that they have a large number of pores inside. And a large number of internal pores make porous metal materials have many excellent properties. Porous organic polymer materials have low strength and are not resistant to high temperatures, while porous ceramics are brittle a...

Examples

Embodiment 1

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

[0041] (2) Add the alcohol solution of aluminum chips prepared in step (1) to 60 parts by mass of deionized water at a stirring speed of 300r / min, stir at room temperature for 10min, then add 12 parts by mass of a 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, 5 parts of polyethylene glycol, after fully stirring and mixing at room temperature, The aluminum chips are uniformly dispers...

Embodiment 2

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

[0048] (2) Add the aluminum chip alcohol solution prepared in step (1) to 70 parts by mass of deionized water, the stirring speed is 320r / min, stir at room temperature for 10min, and then add 17 parts by mass of dispersant, i.e. 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, 5 parts of polyethylene glycol, after fully stirring and mixing at room temperature, The aluminum chips are uniformly dispersed into t...

Embodiment 3

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

[0055] (2) Add the aluminum chip alcohol solution prepared in step (1) to 70 parts by mass of deionized water, the stirring speed is 350r / min, stir at room temperature for 10min, and then add 22 parts by mass of a dispersant, i.e. 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, 6 parts of polyethylene glycol, after fully stirring and mixing at room temperature, The aluminum chips are uniformly dispersed into...

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