Self‐Healing Super Flexible Ionogels With Interpenetrating Dynamic‐Bond and Lossy‐Filler Networks for Robust and Efficient Microwave Absorption

ABSTRACT Traditional microwave absorption (MA) materials are generally brittle and non‐stretchable with limited functionality, making them susceptible to physical damage and electromagnetic performance degradation in harsh marine environments. Ionogels with high toughness and environmental adaptability hold considerable potential for developing advanced microwave absorbers, but their functional incorporation with electromagnetic loss fillers remains a challenge. Herein, a polymer–nanowire hybrid interpenetrating network design, silicon carbide nanowires interpenetrated poly thioctic acid ionogel (SPTA) is proposed. This network realizes the integration of highly flexible robustness, instant self‐healing, excellent MA performance, and stability in marine environments. The fabricated SPTA with 7 wt.% silicon carbide nanowires demonstrates remarkable stretchability (1548%), high toughness (340 kJ m −3 ), and a broad effective absorption bandwidth (6.14 GHz, 2.30 mm). Notably, the ionogel exhibits instant self‐healing capability at room temperature, achieving 100% recovery in MA property and 92% recovery in mechanical strength, which is attributed to the multiple dynamic bonds acting as reversible crosslinks within the interpenetrating network. Furthermore, the ionogel has strong corrosion and swelling resistance in seawater, acidic, and alkaline solutions. Overall, this study provided an effective strategy to fabricate a novel MA material which has great application prospects in complex marine electromagnetic environments.