Preparation method of anf / gmwcnt / pvdf composite metamaterial with double-layered prismatic superstructure with resonant cavity
By fabricating a double-layer truncated pyramidal superstructure of ANF/GMWCNT/PVDF with a resonant cavity, the contradiction between lightweight and broadband absorption performance of existing materials has been resolved, achieving lightweight and efficient electromagnetic wave absorption, which is applicable to the field of electromagnetic wave absorbing materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HARBIN INST OF TECH
- Filing Date
- 2026-06-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing electromagnetic wave absorbing materials face a contradiction between high density, impedance characteristics, and high loss capacity when achieving multi-band absorption, making it difficult to balance lightweight and broadband absorption performance. Furthermore, the bonding method of multi-layer structures and the integrated molding process present technical challenges.
Using aramid nanofibers as the framework, multi-walled carbon nanotubes as the wave absorption loss medium, and polyvinylidene fluoride as the binder, a double-layer truncated pyramidal superstructure of ANF/GMWCNT/PVDF with a resonant cavity was prepared by sol-gel transformation-freeze-drying process. A porous structure and a three-dimensional conductive network were constructed, and impedance matching was optimized.
It achieves lightweight broadband electromagnetic wave absorption performance, has excellent electromagnetic wave energy loss and load-bearing capacity, adapts to electromagnetic wave absorption at different incident angles, and is suitable for service conditions subject to loads.
Smart Images
Figure CN122404792A_ABST