Tough, Transparent, Self-healing Ionogel with Exceptional Moisture and Impact Resistance

Supramolecular materials that combine toughness, transparency, self-healing, and environmental stability are crucial for advanced applications, such as flexible electronics, wearable devices, and protective coatings. However, integrating these properties into a single system remains challenging because of the inherent trade-offs between the mechanical strength, elasticity, and structural reconfigurability. Herein, we report a supramolecular ionogel designed via a simple one-step polymerization strategy that combines hydrogen bonding and ion-dipole interactions in a physically crosslinked network. This dual-interaction architecture enables the ionogel to achieve high tensile strength (9 MPa), remarkable fracture toughness (23.6 MJ·m⁻³), and rapid self-healing under mild thermal stimulation. The material remains highly transparent and demonstrates excellent resistance to moisture, acid, and salt environments, with minimal swelling and performance degradation. Furthermore, it effectively dissipates over 80 MJ·m⁻³ of energy during high-speed impacts, providing reliable protection to fragile substrates. This study offers a broadly applicable molecular design framework for resilient and adaptive soft materials.