Method for preparing novel sound absorption composite material

A technology of sound-absorbing composite materials and nano-composite materials, which is applied in the direction of sound-generating devices and instruments, and can solve problems such as limited application range

Pending Publication Date: 2019-08-30
邳州易萨新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, foam-type sound-absorbing materials are widely used in automobiles. This material has high porosity and three-dimensionally uniform pores. The scope of application is limited

Method used

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  • Method for preparing novel sound absorption composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1) Take 90 parts by weight of dimethyl sulfoxide and 10 parts by weight of deionized water in the reaction kettle, stir at 400 r / min for 2 hours, then heat up to 90°C, add 40 parts by weight of amylose, keep stirring for 2 hours, and then cool to room temperature , adding 20 parts by weight of a mixed solution of Span 80 and Tween 80 in absolute ethanol with a mass fraction of 60%, sonicating for 30 min, centrifuging, washing, and drying at 80 ° C for 48 h, the obtained powdery product was mixed with 10 parts by weight KH570 was blended in a torque rheometer at 170°C for 10min, washed with absolute ethanol, and dried to obtain powdery modified nanostarch;

[0014] 2) Put 70 parts by weight of ethylene vinyl acetate (EVA) and 5 parts by weight of dimethyl silicone oil in a mixing mixer and fully stir it evenly, then transfer it to a drying incubator, dehydrate it at 80 °C for 2~3 hours, and place it in In the reaction kettle, add 12 parts by weight of modified nano-starc...

Embodiment 2

[0019] It is exactly the same as Example 1, except that 50 parts by weight of ethylene vinyl acetate, 6 parts by weight of modified nanostarch, and 20 parts by weight of polystyrene / ZnO nanocomposite are added.

Embodiment 3

[0021] It is exactly the same as Example 1, except that 60 parts by weight of ethylene vinyl acetate, 9 parts by weight of modified nanostarch, and 18 parts by weight of polystyrene / ZnO nanocomposite are added.

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Abstract

The invention discloses a method for preparing a novel sound absorption composite material. According to the method, ethylene vinyl acetate (EVA), dimethicone and dicumyl peroxide are taken as main raw materials, meanwhile, a polystyrene / ZnO nano composite material is introduced, and a porous sound absorption material which is good in sound absorption capability and high in sound absorption coefficient is prepared under the action of a polymer and an additive. Compared with a conventional sound absorption material, the porous sound absorption material prepared by using the method has pores ofa high porosity in three-dimensional uniform distribution, is high in sound absorption coefficient, is applicable to a wide audio frequency band range, and is excellent in sound absorption.

Description

technical field [0001] The invention relates to a preparation method of a novel sound-absorbing composite material, belonging to the field of acoustic materials. Background technique [0002] The NVH problem of vehicles (problems caused by noise, vibration and harshness, etc.) is one of the concerns of major vehicle manufacturers and parts companies in the international automotive industry. Statistics show that about 1 / 3 of vehicle failures are related to vehicle NVH problems, and nearly 20% of the R&D expenses of major companies are spent on solving vehicle NVH problems. With the development of the automobile industry today, people have higher and higher requirements for ride comfort, and the NVH performance of automobiles has become a prominent issue. Noise is an important indicator for evaluating ride comfort. How to reduce the noise level in the passenger room has become a concern of major car manufacturers. [0003] One of the effective ways to reduce the noise level ...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L3/14C08L83/04C08L25/06C08L91/06C08K3/22C08K5/14C08K5/23
CPCC08K2003/2296C08K2201/011C08L23/0853C08L2205/035G10K11/162C08L3/14C08L83/04C08L25/06C08L91/06C08K3/22C08K5/14C08K5/23
Inventor 杜良芹刘明
Owner 邳州易萨新型材料有限公司
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