Three-phase composite structure sound absorption material and preparation method and application thereof

A technology of sound-absorbing materials and composite structures, which is applied in the direction of sound-generating devices and instruments, can solve the problems of poor sound absorption performance at medium and low frequencies and weak mechanical properties, and achieve improved sound absorption performance at medium and low frequencies, improved cushioning performance, and improved response conditions. mild effect

Pending Publication Date: 2019-12-03
XI'AN POLYTECHNIC UNIVERSITY
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Problems solved by technology

[0010] In order to solve the defects of poor mid-low frequency sound absorption performance and weak mechanical properties of sound-absorbing materials in the above-mentioned prior art, the present invention discloses a sound-absorbing material with a thre

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  • Three-phase composite structure sound absorption material and preparation method and application thereof

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[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0039] Such as figure 1 , Is the three-phase composite structure sound-absorbing material of the present invention, including a 3D spacer fabric 1, a polyurethane matrix 2 and hollow microbeads 3; the surface layer of the 3D spacer fabric 1 adopts a knitted fabric formed by a braided chain structure and a weft inserted structure. The 3D spacer fabric 1 is composited with the polyurethane matrix 2, the volume fraction of the hollow microspheres 3 in the polyurethane matrix 2 is 20%-50%, and the hollow microspheres 3 are filled in the polyurethane matrix 2. The chain-knitting yarn of the chain-knitting organization can be polyester, and the weft-inserting yarn of the weft-insertion organization can be carbon fiber tow. The hollow microbeads 3 can be made of glass, with a particle size of less than 100 μm, and a wall thickness of 2%-10% of the particle size.

[0040...

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Abstract

The invention discloses a three-phase composite structure sound absorption material and a preparation method and application thereof, and belongs to the technical field of sound absorption materials.The preparation method includes a step of compounding the polyurethane matrix filled with the hollow microspheres with the 3D spacer fabric; so that the obtained sound absorption material with the three-phase composite structure has the characteristics of a cavity resonance sound absorption material and a particle filling sound absorption material; meanwhile, the 3D spacer fabric is added into thematerial to form micro-perforated holes with the hole diameters being the diameters of the spacer wires and filled with the spacer wires, so that the low and medium frequency sound absorption performance of the material is further improved, and the mechanical property of the material can be obviously improved due to the good buffering performance of the 3D spacer fabric. The sound absorption material can be used as a building sound absorption material and an underwater sound absorption material, and is wide in application range and good in market prospect. The preparation method is simple inprocess, mild in reaction condition, short in preparation period and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of sound-absorbing materials, and in particular relates to a three-phase composite structure sound-absorbing material and its preparation method and application. Background technique [0002] Polyurethane material is a widely used sound-absorbing material because it has both the sound-absorbing mechanism of porous materials and the damping sound-absorbing mechanism of flexible materials, and has the characteristics of light weight. However, the existing polyurethane sound-absorbing materials are generally difficult to effectively absorb medium and low-frequency sound waves, and the sound-absorbing frequency band is narrow. At the same time, the absolute mechanical properties of polyurethane materials are still insufficient, which seriously limits the further application of such materials. [0003] The particle-filled sound-absorbing structure is to add scatterers such as hollow balls to the viscoelastic homo...

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Application Information

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IPC IPC(8): G10K11/162
CPCG10K11/162
Inventor 支超杜明娟余灵婕孟家光程燕婷樊威魏亮孙昭玲涂莉郜仲元
Owner XI'AN POLYTECHNIC UNIVERSITY
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