Ordered Nanostructures Formed by Multi-Interactions for Toughening the Ultrastretchable Conductive Hydrogel

The research employs the dual-effect mechanism of “Topological network structure-silver nanofibers (AgNFs)” in combination with stress induction to solve the uncoordinated competitive relationship formed between the conductivity and mechanical properties of conductive hydrogels. Through the synergistic action of topological network reconfiguration of sodium alginate and dynamic entanglement of AgNFs, conductive hydrogel fibers with a multiscale energy dissipation system are fabricated. They demonstrate ultrastretchability (8226%), high strength (220 kPa). Simultaneously, through stress-induced directional alignment of AgNFs and the disentanglement of the polymer topological network, a dynamic coupling relationship between mechanical properties and electrical conductivity is established, attaining a high electrical conductivity of 15.1 S/m and enabling reversible regulation of electrical conductivity within a certain strain range. This multilevel structural synergy strategy transcends the performance triangle constraint of traditional hydrogels in terms of “strength-ductility-conductivity”, offering a novel design concept for the development of flexible electronics.