abstract |
The invention relates to a flexible polyurethane foam and a resonance cavity structure formed by the flexible polyurethane foam. Alumina nanoparticles are attached to the skeleton of the flexible polyurethane foam, and the resonance cavity structure is composed of the flexible polyurethane foam. Compared with the prior art, the invention has the advantages of simple preparation process, better sound absorption and noise removal effect, and the like. |