State Key Laboratory of Organic-Inorganic Composites, Key Laboratory of Carbon Fibre and Functional Polymer, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Inner Mongolia Aerospace Hong Gang Machinery Corporation Limited, Inner Mongolia, 010076, P. R. China.
Small. 2022 Apr;18(13):e2105411. doi: 10.1002/smll.202105411. Epub 2022 Feb 9.
Developing microwave absorption (MA) materials with ultrahigh efficiency and facile preparation method remains a challenge. Herein, a superior 1D@2D@1D hierarchical structure integrated with multi-heterointerfaces via self-assembly and an autocatalytic pyrolysis is designed to fully unlock the microwave attenuation potential of materials, realizing ultra-efficient MA performance. By precisely regulating the morphology of the metal organic framework precursor toward improved impedance matching and intelligently integrating multi-heterointerfaces to boosted dielectric polarization, the specific return loss value of composites can be effectively tuned and optimized to -1002 dB at a very thin thickness of 1.8 mm. These encouraging achievements shed fresh insights into the precise design of ultra-efficient MA materials.
开发具有超高效率和简便制备方法的微波吸收（MA）材料仍然是一个挑战。在此，通过自组装和自催化热解设计了一种具有优越的 1D@2D@1D 分级结构的复合材料，该结构集成了多种异质界面，可以充分释放材料的微波衰减潜力，实现超高效的 MA 性能。通过精确调控金属有机骨架前驱体的形态以改善阻抗匹配，并巧妙地集成多种异质界面以增强介电极化，可有效调节和优化复合材料的特定回波损耗值，使其在 1.8mm 很薄的厚度下可达到-1002dB。这些令人鼓舞的成果为超高效 MA 材料的精确设计提供了新的思路。
