Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 17, 2025
Abstract Intelligent materials with tunable microwave absorption are crucial for addressing challenges in complex electromagnetic environments. A significant challenge this field is achieving large, continuous, and precise control over properties. To address these issues, a series of intelligent hydrogels directly fabricated by the dynamic interaction natural polyphenols graphene oxide, which enabled large‐scale variability continuously temperature change. This tunability attributed to interplay between π–π stacking hydrogen bonding at different temperatures. At elevated temperatures, can boost electron transfer, impedance matching, loss capacity. Notably, demonstrate near‐linear change up 88.7% dielectric constant 20–80 °C range, maximum reflection difference 43.99 dB an effective bandwidth 3.08 GHz. Furthermore, also exhibit excellent switching function wireless charging tests, near‐field scanning, image communication, Radar Cross Section (RCS) simulations aircraft.
Language: Английский