A kind of sound-absorbing structure composite material and preparation method thereof

Abstract

The invention relates to a sound-absorption structured composite material. The sound-absorption structured composite material is composed of a resin matrix, a high-performance fiber-reinforced body and a plurality of layers of through micro-porous passages; the composite material is of a plate shape, planes formed by the plurality of layers of through micro-porous passages in the plate are parallel with one other and are parallel to the upper surface and the lower surface of the plate, a plurality of through micro-porous passages in each layer are parallel with one another and the trends of the micro-porous passages of each two adjacent layers are orthogonally overlaid in space; the diameter of each micro-porous passage is 1001microns-1mm, and the distance of the center lines of each two adjacent micro-porous passages is 1mm-2mm. A preparation method of the sound-absorption structured composite material comprises the steps of laying multiple layers of high-performance fiber prepregs impregnated with epoxy resin, arranging prefabricated straight metal pipelines among the layers, laminating, fixing, compositely forming with an epoxy resin matrix by a molding process, and then carrying out electrochemical corrosion on the prefabricated straight metal pipelines. The sound-absorption structured composite material integrates a structure material and a sound absorption property, the construction process is simplified, the cost is reduced, and the sound-absorption structured composite material has the excellent performance of good sound-absorption effect, corrosion resistance, environment protection, light weight, high strength and the like.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a sound-absorbing structure composite material and a preparation method thereof. Background technique [0002] With the development of science and technology and modern industry, noise pollution has become a worldwide problem. At the same time, with the enhancement of environmental protection awareness, people's requirements for the sound environment are getting higher and higher. Sound absorption and noise reduction has gradually evolved into an important issue related to the coordinated development of high technology, the environment and human beings that needs to be solved urgently, such as the absorption and isolation of noise and vibration generated by high-speed trains, especially the "silent sound" technology of submarines. The characteristics of submarines are concealment and surprise attack. In the era of highly developed modern anti-submarine tec...

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Problems solved by technology

[0007] However, the sound-absorbing materials mentioned in the above-mentioned patents are all used as a single sound-absorbing layer or decorative layer. In actual use, structural materials are required to bear external forces, and the sound-absorbing layer is prone to peeling off and failure due to increased process links. high cost

Resonant sound-absorbing structural materials have high low-frequency sound absorption coefficients, but poor processing performance. At present, the most widely used porous sound-absorbing materials have low low-frequency sound absorption coefficients. The preparation process of foam metal sound-absorbing materials is complicated, and molding difficulties restrict its development; foam rubber Inorganic fibers in plastic composite sound-absorbing materials such as rock wool, glass wool, and aluminum silicate fiber cotton are brittle and easy to break, and the sound-absorbing performance decreases seriously when they are damp, which is easy to cause harm to the environment

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