A kind of metal organic framework-based broadband wave absorbing material and its preparation method and use
Patent Information
- Application Number
- CN202311210560.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-19
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2043-09-19
AI Technical Summary
但是，该结构在改善阻抗匹配的同时，牺牲了材料衰减电磁波的能力，增加了匹配厚度，材料不具备轻质的特性
[0023]This invention utilizes the porous framework structure of melamine foam (MF) and the layered network structure of carboxymethyl cellulose (CMC) to construct a metal-organic framework-based carbon foam material. In this carbon foam material, the metal-organic framework grows in situ within the porous framework and layered network, uniformly distributing to surround all electromagnetic wave transmission paths. This significantly enriches the electromagnetic wave loss mechanism and enhances the material's attenuation capability. The metal-organic framework-based carbon foam material of this invention possesses high impedance matching characteristics and can absorb electromagnetic waves over a relatively small thickness range. Among them, the effective absorption bandwidth (EAB) of the carbon foam material Co/C@MC-2 based on the metal-organic framework ZIF67 exceeded 8 GHz in the thickness range of 3.5 to 8 mm, and the EAB was 11.5 GHz at 5.4 mm. The carbon foam materials Fe/C@MC based on the metal-organic framework MIL-88A and Ni/C@MC based on the metal-organic framework Ni-MOF-74 had the widest absorption bandwidths of 7.7 and 8.5 GHz, respectively. At the same time, they showed minimum reflection losses of -76.9 and -53.8 dB, respectively, at matching thicknesses of 2.5 mm and 2.7 mm. L ).