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Composite sound absorbing material, and preparation method thereof

A technology of sound-absorbing materials and raw materials, which is applied in the field of composite sound-absorbing materials, can solve the problems of poor mechanical properties, poor moisture resistance, and low strength, and achieve good porosity and compressive yield strength, good processability and mechanical properties, and a wide range of applications. Effect

Active Publication Date: 2016-12-21
GUANGZHOU SOUNDBOX ACOUSTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, wood sound-absorbing materials and polyester fiber sound-absorbing materials are the most common, but wood sound-absorbing materials have poor moisture resistance and low strength; polyester fiber sound-absorbing materials are expensive, and they are chemical products, which are not recyclable products.
[0004] In addition, most of the current sound-absorbing materials generally have poor mechanical properties, which directly affects the service life of the sound-absorbing materials and indirectly increases the cost of use.

Method used

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  • Composite sound absorbing material, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] A composite sound-absorbing material of the present invention is made of the following raw materials: 88kg of modified fly ash, 55kg of organic bentonite, 50kg of perlite, 55kg of barite powder, 35kg of alumina, 30kg of antimony trioxide, and Tin 20kg, borax 20kg, sodium silicate 10kg; Wherein, modified fly ash is made by the following method: first soak 3 hours with the sodium hydroxide solution of mass concentration 12%, wash clean with deionized water, then use mass concentration Soak in 10% hydrochloric acid solution for 2 hours, wash with deionized water until neutral, dry, add 2% methyltriethoxysilane and 1% epoxidized triglyceride equivalent to the weight of fly ash, Stir at 1200r / min for 20 minutes, dry, pulverize and grind.

[0022] The above-mentioned preparation method of a composite sound-absorbing material comprises the steps of:

[0023] (1) Take by weighing the sodium silicate of formula quantity, prepare the sodium silicate solution with mass fraction 0...

Embodiment 2

[0028] A composite sound-absorbing material of the present invention is made of the following raw materials: 100kg of modified fly ash, 65kg of organic bentonite, 65kg of perlite, 60kg of barite powder, 45kg of alumina, 40kg of antimony trioxide, and Tin 30kg, borax 30kg, sodium silicate 15kg; Wherein, modified fly ash is made by the following method: first soak 4 hours with the sodium hydroxide solution of mass concentration 12%, wash clean with deionized water, then use mass concentration Soak in 10% hydrochloric acid solution for 3 hours, wash with deionized water until neutral, dry, add 3% methyltriethoxysilane and 2% epoxidized triglyceride equivalent to the weight of fly ash, Stir at 1500r / min for 30 minutes, dry, pulverize and grind.

[0029] The above-mentioned preparation method of a composite sound-absorbing material comprises the steps of:

[0030] (1) Take the sodium silicate of formula quantity, prepare with water the sodium silicate solution of mass fraction 1.5...

Embodiment 3

[0035] A composite sound-absorbing material of the present invention is made of the following raw materials: 90kg of modified fly ash, 58kg of organic bentonite, 52kg of perlite, 56kg of barite powder, 38kg of alumina, 32kg of antimony trioxide, and Tin 23kg, borax 22kg, sodium silicate 11kg; Wherein, the modified fly ash is made by the following method: first soak 3 hours with the sodium hydroxide solution of mass concentration 12%, wash clean with deionized water, then use mass concentration Soak in 10% hydrochloric acid solution for 3 hours, wash with deionized water until neutral, dry, add 2% methyltriethoxysilane and 2% epoxidized triglyceride equivalent to the weight of fly ash, Stir at 1300r / min for 20 minutes, dry, pulverize and grind.

[0036] The above-mentioned preparation method of a composite sound-absorbing material comprises the steps of:

[0037] (1) Take the sodium silicate of formula quantity, prepare with water the sodium silicate solution of mass fraction ...

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Abstract

The invention discloses a composite sound absorbing material, and a preparation method thereof. The composite sound absorbing material is prepared from, by weight, 88 to 100 parts of modified fly ash, 55 to 65 parts of organic bentonite, 50 to 65 parts of perlite, 55 to 60 parts of barite powder, 35 to 45 parts of aluminium oxide, 30 to 40 parts of antimonous oxide, 20 to 30 parts of stannous chloride, 20 to 30 parts of borax, and 10 to 15 parts of sodium silicate. The composite sound absorbing material is high in sound absorption coefficient, and wide in distribution frequency band; possesses excellent sound absorbing effect at low frequency (lower than 500Hz), medium frequency (500 to 2000Hz), and high frequency (higher than 2000Hz) zones, and wide application range; and also possesses excellent porosity, compressive yield strength, processing performance, and mechanical properties.

Description

technical field [0001] The invention relates to a composite sound-absorbing material. It belongs to the technical field of chemical materials. Background technique [0002] Sound originates from the vibration of an object, which causes the vibration of the adjacent air to form sound waves, and propagates around in the air medium. Any material can absorb sound, but the degree of absorption is very different. Generally, materials with an average sound absorption coefficient greater than 0.2 are listed as sound-absorbing materials, which have sound-absorbing and noise-reducing effects. When the sound is transmitted to the surface of the sound-absorbing material, part of the sound energy is reflected, part of the sound energy penetrates the material, and part of the sound energy is converted into heat energy due to the vibration of the sound-absorbing material or the friction with the surrounding medium when the sound propagates in it, and the sound energy is lost. , that is, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26C04B20/02
CPCC04B20/023C04B28/26C04B2111/52C04B18/08C04B14/12C04B14/18C04B14/368C04B14/304C04B14/30C04B22/12C04B14/36
Inventor 何颖
Owner GUANGZHOU SOUNDBOX ACOUSTIC TECH
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