Puncture-Resistant Hydrogel: Placing Molecular Complexes Along Phase Boundaries.

Trendy advances in electric cars and wearable electronics triggered growing awareness in device lethality/survivability from accidents. A divergent design in protection calls for high stress resistance, large ductility, as well as efficient energy dissipation, all from the device itself while keeping the weight-specific device performance to its premium. Unfortunately, the polymer electrolyte or the ductile elastomer lacked a mechanistic design to resist puncture or tear at a high stress level. Here we designed molecular complexes along phase boundaries to mitigate the damages, by placing those mechanically strong complexes along the phase boundaries or between two immiscible polymers. This puncture-resistant gel, dubbed as gel-nacre, is able to survive a few challenging incidents, including a 400-MPa-puncture from a sharp nail, a 1-cm steel ball traveling at 540 km/h, and attempted rupture on stitched samples.