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Sound-absorbing material and preparation method thereof

A technology of sound-absorbing material and mixing slurry, which is used in sound-producing equipment, textiles, papermaking, instruments, etc., can solve the problem that the sound-absorbing effect needs to be further improved, and achieve great application prospects and commercial value, excellent mechanical properties, and material structure design. strong effect

Inactive Publication Date: 2017-05-31
WUXI MINGSHENG TEXTILE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is simple, the material structure design is strong, and the product has excellent sound-absorbing performance, but its sound-absorbing effect still needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of a sound-absorbing material, the specific steps are:

[0029] The first step: the surface of the nanofiber foam is activated by an alkali reduction method, wherein the alkali solution is a 2% sodium hydroxide solution by mass fraction, and the nanofiber foam is immersed in a 2% sodium hydroxide solution, and after 1 hour Take it out and wash it to neutral, then put it into a blast oven and dry it; the volume density of the nanofiber foam is 0.1mg / cm 3 , the average pore diameter is 0.01μm, and the specific surface area is 10m 2 / g; the nanofiber foam is a nanofiber foam with uniform overall density;

[0030] Step 2: Dissolve 20g of phenolic adhesive, 5g of graphene oxide and 10g of ZnO quantum dots in 70g of acetone, and ultrasonicate for 48 hours to obtain a mixed slurry;

[0031] The third step: at a temperature of 40°C and a pressure of 4×10 7 Under the condition of Pa, the nanofiber foam obtained in the first step is treated with supercriti...

Embodiment 2

[0035] A preparation method of a sound-absorbing material, the specific steps are:

[0036] Step 1: Use solvent extraction method to activate the surface of nanofiber foam, wherein the extraction solvent is dichloromethane, the extraction time is 30min, and the number of extractions is 3 times, so that the surface soluble functional groups are removed by dichloromethane to form active sites point; the nanofiber foam bulk density is 50mg / cm 3 , the average pore diameter is 10μm, and the specific surface area is 2000m 2 / g; the nanofiber foam is a nanofiber foam material whose overall density changes uniformly along the thickness direction;

[0037] Step 2: Dissolve 40g of phenolic adhesive, 1g of graphene oxide and 30g of ZnO quantum dots in 280g of acetone, and ultrasonicate for 24 hours to obtain a mixed slurry;

[0038] The third step: at a temperature of 45°C and a pressure of 2×10 7 Under the condition of Pa, the nanofiber foam obtained in the first step is treated with...

Embodiment 3

[0041] A preparation method of a sound-absorbing material, the specific steps are:

[0042] Step 1: Activate the surface of the nanofiber foam by using the hydrothermal growth method, wherein the solution used in the hydrothermal growth method is a glucose solution with a mass fraction of 5%, the heating temperature is 200°C, the pressure is 10MPa, and the treatment time is 2 hours; The nanofiber foam bulk density is 5mg / cm 3 , the average pore diameter is 1μm, and the specific surface area is 1000m 2 / g; the nanofiber foam is a nanofiber foam material whose overall density changes gradiently along the thickness direction.

[0043] Step 2: Dissolve 20g of phenolic adhesive, 3g of graphene oxide and 30g of ZnO quantum dots in 159g of acetone, and ultrasonicate for 36h to obtain a mixed slurry;

[0044] The third step: at a temperature of 42°C and a pressure of 3×10 7 Under the condition of Pa, the nanofiber foam obtained in the first step is treated with a mixture of supercr...

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Abstract

The invention provides a preparation method of a sound-absorbing material. The characteristics lie in that the preparation method specifically comprises the steps of firstly, performing activation treatment on the surface of nano-fiber foam; secondly, dissolving a phenolic adhesive, graphene oxide and ZnO quantum dots into acetone, and performing ultrasonic treatment for 24-48h to acquire a mixed slurry; thirdly, processing the nano-fire foam acquired in the first step by adopting a supercritical carbon dioxide fluid and the mixed slurry acquired in the second step, then reducing the intensity of pressure, enabling the nano-fiber foam to desorb the supercritical carbon dioxide fluid, and enabling the phenolic adhesive, the graphene oxide and the ZnO quantum dots to be uniformly scattered at the fiber surface; and fourthly, enabling the adhesive to be cured and crosslinked by adopting a thermal crosslinking method so as to acquire a sound-absorbing material. The sound-absorbing material has more excellent sound-absorbing performance. A sound-absorbing material with the thickness being 5mm is tested by using an ISO10534-2 method, the low-frequency sound absorption coefficient is above 0.70, and the maximum sound absorption coefficient is above 0.99.

Description

technical field [0001] The invention belongs to the technical field of noise pollution control, and in particular relates to a sound-absorbing material and a preparation method thereof. Background technique [0002] Noise pollution has caused great harm to people's physical and mental health. Effectively preventing noise pollution and reducing the harm of noise are necessary measures to ensure people's normal work and life. Sound-absorbing materials can control noise pollution from three aspects: the source of noise generation, the process of transmission, and the protection of terminal victims. It is the most effective means of applying noise pollution. Sound-absorbing materials can be divided into porous sound-absorbing materials, resonant sound-absorbing materials and special-structure sound-absorbing materials according to their sound-absorbing characteristics. Among them, porous sound-absorbing materials have the characteristics of light weight and good sound-absorbing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162D06M15/41D06M11/76D06M11/44D06M10/02
CPCG10K11/162D06M10/02D06M11/44D06M11/76D06M15/41
Inventor 张达明
Owner WUXI MINGSHENG TEXTILE MACHINERY
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