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Layered structural composite material for low-frequency sound absorption and preparation method of layered structural composite material

A layered structure and composite material technology, applied in the field of material processing, can solve the problems of bulky composite materials and achieve excellent low-frequency sound absorption effect

Inactive Publication Date: 2017-10-24
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional and single materials are far from meeting the current needs, especially in low-frequency sound-absorbing materials, which are mostly thick and bulky composite materials

Method used

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  • Layered structural composite material for low-frequency sound absorption and preparation method of layered structural composite material

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Effect test

Embodiment 1

[0018] A method for preparing a layered structure composite material for low-frequency sound absorption, the preparation steps are as follows:

[0019] (1) Modification of barium titanate powder: take a certain amount of barium titanate powder and 2.5% TMC-101 of the powder mass, put it into a ball mill and mill it for 5 minutes to obtain the modified barium titanate;

[0020] (2) Preparation of piezoelectric composite materials: Add 100 parts of nitrile rubber, 3 parts of ZnO, 0.75 parts of stearic acid, 0.75 parts of zinc stearate, 0.75 parts of magnesium oxide, and antioxidant 0.6 parts of 4010, 0.6 parts of accelerator TMTD, 0.6 parts of accelerator CZ and 1 part of sulfur, the volume ratio of conductive carbon black is 6%, the volume ratio of barium titanate powder is 8%, knead at 40 ° C for 25 minutes The mixed rubber was obtained, and the mixed rubber was vulcanized for 15 minutes under the conditions of 165 ° C and 15 MPa to obtain a piezoelectric composite material; ...

Embodiment 2

[0024] A method for preparing a layered structure composite material for low-frequency sound absorption, the preparation steps are as follows:

[0025] (1) Modification of barium titanate powder: Take a certain amount of barium titanate powder and 3% isopropyl tris(dioctyl phosphate acyloxy) titanate (TMC-102) of the powder mass, put Ball milling in a ball mill for 9 minutes to obtain modified barium titanate;

[0026] (2) Preparation of piezoelectric composite materials: Add 100 parts of nitrile rubber, 4 parts of ZnO, 1.2 parts of stearic acid, 1.2 parts of zinc stearate, 1.2 parts of magnesium oxide, and antioxidant 0.8 parts of 4010, 1.6 parts of accelerator TMTD, 0.8 parts of accelerator CZ and 0.9phr of sulfur, the volume ratio of conductive carbon black is 7%, the volume ratio of barium titanate powder is 10%, mixed at 60°C for 25min The mixed rubber is obtained, and the mixed rubber is vulcanized at 170°C and 15MPa for 20 minutes to obtain a piezoelectric composite ma...

Embodiment 3

[0030] A method for preparing a layered structure composite material for low-frequency sound absorption, the preparation steps are as follows:

[0031] (1) Modification of barium titanate powder: take a certain amount of barium titanate powder and 4% bis(dioctyloxypyrophosphate) ethylene titanate (TMC-201) of the powder mass, put Ball milling in a ball mill for 10 minutes;

[0032] (2) Preparation of piezoelectric composite materials: add 100 parts of nitrile rubber, 5 parts of ZnO, 1.5 parts of stearic acid, 1.5 parts of zinc stearate, 1 part of magnesium oxide, and anti-aging agent in the internal mixer or open mill 1 part of 4010, 2 parts of accelerator TMTD, 1 part of accelerator CZ and 1.5 parts of sulfur, the volume ratio of conductive carbon black is 8%, the volume ratio of barium titanate powder is 18%, mixed at 60 ° C for 28 minutes The mixed rubber is obtained, and the mixed rubber is vulcanized at 170°C and 15MPa for 20 minutes to obtain a piezoelectric composite m...

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Abstract

The invention belongs to the field of material processing, and particularly relates to a layered structural composite material for low-frequency sound absorption and a preparation method of the layered structural composite material. The method comprises the following steps: mixing and ball milling barium titanate powder and a titanate coupling agent to obtain modified barium titanate powder; mixing and vulcanizing ZnO, stearic acid, zinc stearate, magnesium oxide, anti-aging agent, accelerant TMTD, accelerant CZ, conducting carbon black, modified barium titanate powder and sulfur, and obtaining a piezoelectric composite material; and compounding the piezoelectric composite material and polyurethane foam by utilizing a binder to obtain the layered structural composite material according to a structure that an intermediate layer is formed by polyurethane foam, and two sides are formed by the piezoelectric composite material. The piezoelectric composite material and the polyurethane foam are used as a sound absorption material structure, so that by utilizing a synergistic effect of a piezoelectric effect and porous foam, the layered structural composite material obtains an excellent low-frequency sound absorption effect in the case of smaller material thickness.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to a layered structure composite material for low-frequency sound absorption and a preparation method thereof. Background technique [0002] The noise problem in modern society is becoming more and more serious. Noise (especially medium and low frequency noise) not only causes damage to the human body, but also accelerates the aging of machine parts and reduces the service life of the machine. The development and application of vibration and noise reduction technology has become an important research content. Traditional and single materials are far from meeting the current needs, especially in low-frequency sound-absorbing materials, which are mostly thick and bulky composite materials. The sound-absorbing composite structure is a combination of materials that can achieve sound absorption in a specific frequency range. Different combinations are used in different envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/40
CPCB32B9/00B32B5/18B32B9/046B32B2266/0278
Inventor 江学良杨振姚楚游峰姚军龙
Owner WUHAN INSTITUTE OF TECHNOLOGY
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