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Low-frequency sound absorption rubber composite material based on cavity structure and preparation method thereof

A technology of sound-absorbing rubber and composite materials, which can be used in sound-producing equipment, instruments, etc., can solve problems such as narrow sound-absorbing frequency band, and achieve strong absorption, excellent low-frequency sound absorption effect, and wide application prospects.

Active Publication Date: 2018-09-28
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Resonant materials have the advantages of fire prevention, cleanliness, and no pollution, and have good sound absorption performance in the low frequency band, but the sound absorption frequency band is narrow, and they can only work well near the resonance frequency

Method used

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  • Low-frequency sound absorption rubber composite material based on cavity structure and preparation method thereof

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Effect test

Embodiment 1

[0023] A method for preparing a low-frequency sound-absorbing rubber composite material based on a cavity structure. The preparation steps are as follows:

[0024] (1) Modification of lead zirconate titanate powder: take a certain amount of lead zirconate titanate powder and heat it in a muffle furnace at a constant temperature of 1200°C for 2 hours, and then place it in a ball mill for 15 minutes;

[0025] (2) Preparation of piezoelectric composite material: In the open mill, add 100 phr of nitrile rubber, 3 phr of nano zinc oxide, 0.75 phr of stearic acid, 0.75 phr of zinc stearate, 0.6 phr of antioxidant RD, and 1.0 phr of accelerator TMTD. , Accelerator CZ0.5phr, conductive carbon black 0.8phr, carbon black 9.2phr, lead zirconate titanate 127phr and sulfur 1.5phr, mixed under 80℃ for 25min to obtain a rubber compound, and the rubber compound is at 160℃, 15MPa conditions Vulcanize for 15 minutes to obtain piezoelectric composite material;

[0026] (3) Composite structure of sound...

Embodiment 2

[0029] A method for preparing a low-frequency sound-absorbing rubber composite material based on a cavity structure. The preparation steps are as follows:

[0030] (1) Modification of lead zirconate titanate powder: a certain amount of lead zirconate titanate powder is heat-treated in a muffle furnace at a constant temperature of 1200°C for 3 hours, and then placed in a ball mill for ball milling for 25 minutes;

[0031] (2) Preparation of piezoelectric composite material: Add 100phr of nitrile rubber, 4phr of nano zinc oxide, 1.2phr of stearic acid, 1.2phr of zinc stearate, antiaging agent RD 0.8phr, and accelerator TMTD 1.2phr in the open mill. , Accelerator CZ 0.6phr, conductive carbon black 1.0phr, carbon black 9.0phr, lead zirconate titanate 127phr and sulfur 1.2phr, and lead zirconate titanate powder is added at the same time, and mixed at 80℃ for 25min to obtain a mixed rubber. The rubber compound was vulcanized at 170°C and 15MPa for 20 minutes to obtain piezoelectric compo...

Embodiment 3

[0035] A method for preparing a low-frequency sound-absorbing rubber composite material based on a cavity structure. The preparation steps are as follows:

[0036] (1) Modification of lead zirconate titanate powder: a certain amount of lead zirconate titanate powder is heat-treated in a muffle furnace at a constant temperature of 1200°C for 2 hours, and then placed in a ball mill for 25 minutes;

[0037] (2) Preparation of piezoelectric composite material: add 100phr of nitrile rubber, 4phr of nano zinc oxide, 1.2phr of stearic acid, 1.2phr of zinc stearate, antiaging agent RD 0.8phr, and accelerator TMTD 1.6phr in the open mill. , Accelerator CZ 0.8phr, conductive carbon black 1.0phr, carbon black 9.0phr, lead zirconate titanate 190phr and sulfur 1.2phr, mixed under 80℃ for 25min to obtain a rubber compound, and the rubber compound is at 170℃, 15MPa conditions Vulcanize for 20 minutes to obtain piezoelectric composites;

[0038] (3) Composite structure of sound-absorbing material: ...

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Abstract

The invention belongs to the field of material processing, and particularly relates to a low-frequency sound absorption rubber composite material based on a cavity structure and a preparation method thereof. The preparation method comprises the following steps of performing heat treatment on lead zirconate titanate ceramic powder; putting the lead zirconate titanate ceramic powder into a ball millto perform ball milling, so as to obtain modified lead zirconate titanate ceramic powder; sequentially adding nitrile rubber, zinc oxide, stearic acid, zinc stearate, anti-aging agents, accelerants,conductive carbon black, carbon black, sulfur and the modified lead zirconate titanate ceramic powder into an open mill; performing milling and vulcanization treatment to obtain a piezoelectric composite material; performing assembling according to principles that the side facing the sound waves is the piezoelectric composite material, and the other side forms a certain cavity structure so as to obtain the sound absorption rubber composite material. The microscopic piezoelectric effect and the cavity structure resonance principle are used for performing sound absorption material preparation; through the combination of the cavity resonance, the sound absorption effect of the piezoelectric composite material moves to a low-frequency region; the low-frequency sound absorption rubber compositematerial realizing wider and stronger absorption is obtained. Wide application prospects are realized in the sound absorption field.

Description

Technical field [0001] The invention belongs to the field of material processing, and specifically relates to a low-frequency sound-absorbing rubber composite material based on a cavity structure and a preparation method thereof. Background technique [0002] With the rapid development of modern industries, noise pollution has become increasingly serious. In order to reduce the harm of noise to people's physical and mental health, sound-absorbing materials play a pivotal role in noise control. Nowadays, sound absorption and noise reduction materials have been widely used in various fields of people's production and life. [0003] Early sound-absorbing materials were mainly natural fiber materials such as cotton, hemp, and felt. Although natural fiber sound-absorbing materials have lower cost and wide sound absorption frequency, they have poor fire resistance, moisture resistance and corrosion resistance. Subsequently, people developed inorganic porous materials, polymer foamed so...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08K13/06C08K3/24C08K9/00C08K3/04C08K5/098G10K11/162
CPCC08K3/04C08K3/24C08K5/098C08K9/00C08K13/06C08K2201/011C08K2201/014G10K11/162C08L9/02
Inventor 江学良王知杰姚楚游峰
Owner WUHAN INSTITUTE OF TECHNOLOGY
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