Multi-stage foam sound-absorbing black body material and preparation method thereof
US12215211B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2023 |
| Grant date | Feb 4, 2025 |
| Priority date | — |
| Expiry date | Feb 28, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2379/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In the present invention, a multi-stage foam sound-absorbing black body material is provided for the first time. A graphene aerogel is introduced into a commercialized polymer foam skeleton by using a solvent plasticizing and foaming technology, so as to embed ultra-thin graphene drums in the foam skeleton. When sound waves enter the foam black body, a large number of graphene drums generate a severe resonance effect, thereby rapidly achieving attenuation of the sound waves, and combined with the friction loss of the porous structure of the polymer foam on the sound waves, excellent sound-absorbing performance is achieved in a wide frequency range. The present solution is provided on the basis of commercialized foam materials, has a simple method, low costs, and the potential of wide industrial application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.