Construction of segregated double network elastomers: synergizing natural guar gum scaffolds with ionic liquids for high performance flexible electronics

Stretchable solid-state ion-conductive elastomers are essential for next-generation wearable bioelectronics and soft electronics. However, their inherent mechanical-conductive trade-off has been a persistent barrier to practical applications. Here we addressed this challenge by developing an ion-conductive elastomer with segregated double-network (SDN). Its flexible rubber network provides intrinsic elasticity, while the rigid guar gum (GG) / ionic liquid (IL) network enables simultaneous energy dissipation and ion transport, yielding a toughness of 16.60 MJ m − 3 and the conductivity of 0.036 S m − 1 . Furthermore, moisture absorption induces SDN thickness swelling and promotes ion dissociation, further boosting its ionic conductivity. These advances enable the SDN elastomer an ideal candidate for moisture electric generators (MEGs) and respiratory monitoring systems. This network engineering approach provides a universal paradigm for high-performance ion-conductive elastomers and next-generation wearable electronics.