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Preparation method of graphene porous materials for sound insulation and noise reduction

A porous material, sound insulation and noise reduction technology, applied in the direction of graphene, sound-generating devices, instruments, etc., can solve problems such as limited degree, achieve the effect of low density, simple preparation process, and improved sound absorption coefficient

Active Publication Date: 2018-11-13
北京石墨烯技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although porous materials also have certain sound insulation properties due to their internal closed pores, the degree is very limited.

Method used

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  • Preparation method of graphene porous materials for sound insulation and noise reduction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 prepares graphene porous material

[0034] 1) Weigh 150 g of graphene oxide powder in 7500 mL of distilled water, and ultrasonically process the graphene oxide aqueous solution at 25 kHz for 2 h;

[0035] 2) Add the graphene oxide aqueous solution obtained in step 1) into the reaction kettle, heat and react at 250°C for 36 hours, then cool naturally, and dry at low temperature to obtain graphene macroscopic material, and pass through a 32-mesh sieve to obtain graphene powder;

[0036] 3) Weigh 68g of the graphene powder obtained in step 2), add 340mL distilled water to make a dispersion; 3 340mL of metal aluminum porous material was immersed in it for 10min, and dried at low temperature to obtain a composite of graphene and aluminum-based porous material;

[0037] 4) Take the composite obtained in step 3) and 0.25mm thick glass cloth for hot pressing and compounding. The hot pressing temperature is 150 ° C, the pressure is 0.5 MPa, and the time is 80 min; ...

Embodiment 2

[0040] Embodiment 2 prepares graphene porous material

[0041] 1) Weigh 30 g of graphene oxide powder in 3000 mL of distilled water, and ultrasonically process the graphene oxide aqueous solution at 20 kHz for 2 h;

[0042] 2) Add the graphene oxide aqueous solution obtained in step 1) into the reaction kettle, heat and react at 250°C for 36 hours, then cool naturally, and dry at low temperature to obtain graphene macroscopic material, and pass through a 32-mesh sieve to obtain graphene powder;

[0043] 3) Weigh 13.6g of the graphene powder obtained in step 2), add 340mL distilled water to make a dispersion; 3 Immerse 340mL of the aramid porous material in it and let it stand for 10min, and dry it at low temperature to obtain a composite of graphene and aramid porous material;

[0044] 4) Take the composite obtained in step 3) and 0.1mm thick non-woven fabric for hot pressing and compounding. The hot pressing temperature is 120 ° C, the pressure is 1 MPa, and the time is 100 ...

Embodiment 3

[0047] Embodiment 3 prepares graphene porous material

[0048]1) Weigh 80 g of graphene oxide powder in 8000 mL of distilled water, and ultrasonically process the graphene oxide aqueous solution at 25 kHz for 1 h;

[0049] 2) Add the graphene oxide aqueous solution obtained in step 1) into the reaction kettle, heat and react at 180°C for 24 hours, then cool naturally, dry at low temperature to obtain graphene macroscopic material, and pass through a 60-mesh sieve to obtain graphene powder;

[0050] 3) Weigh 34g of the graphene powder obtained in step 2), add 1700mL of distilled water to make a dispersion; take the pore diameter of 2.75mm and the bulk density of 48kg / m 3 850mL of aramid porous material with a pore size of 500μm and a bulk density of 18kg / m 3 Immerse 850mL of the polyimide porous material in it and let it stand for 2 days, and dry it at low temperature to obtain a composite of graphene and aramid fiber / polyimide porous material;

[0051] 4) Take the compound o...

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Abstract

The invention relates to a preparation method of porous materials, and more specifically relates to a preparation method of graphene porous materials for sound insulation and noise reduction. The graphene porous materials prepared by the preparation method of graphene porous materials for sound insulation and noise reduction have good sound insulation effect, not only effectively reduce the mediumand low frequency noise in the environment, but also have good barrier effect on the medium and high frequency living noise. And at the same time, the sound absorption coefficient of the graphene porous materials for sound insulation and noise reduction is greatly improved in the test range. The preparation method of graphene porous materials for sound insulation and noise reduction is simple inthe preparation technology, and is easy to realize industrial grade production, and at the same time, the density, structure and size of the materials are easy to control, and can be flexibly adjustedaccording to specific application scenes. The graphene porous materials prepared by the preparation method of graphene porous materials for sound insulation and noise reduction have a small density and is substantially maintained in the same order of magnitude as the density of the original porous materials; and the graphene porous materials have high thermal stability and are non-flammable, andcan be used in the fields of construction, transportation, aerospace, etc.

Description

technical field [0001] The invention relates to a preparation method of a porous material, in particular to a preparation method of a graphene porous material for sound insulation and noise reduction. Background technique [0002] With the rapid development of my country's aviation, railways, highways and urban traffic, on the one hand, it provides people with travel convenience and improves work efficiency, and on the other hand, it brings pollution (atmosphere, noise) to the environment. Noise pollution has been recognized as the three major contemporary pollutions along with air pollution and water pollution. Noise reduction is extremely important for improving the working environment of human beings, improving the quality of life, and improving the concealment of military equipment. [0003] Traditional sound insulation and noise reduction materials are mainly relatively hard and dense materials such as brick walls, asphalt, glass, and rubber. The common feature of thes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162C01B32/184
CPCG10K11/162C01B32/184
Inventor 杨程时双强陈宇滨褚海荣戴圣龙
Owner 北京石墨烯技术研究院有限公司