Eucommia Ulmoides Gum-Inspired Topological Confinement Enables Direct Spinning of All-Solid-State Ionic Conductive...

Stretchable conductive fibers have attracted considerable attention owing to their exceptional flexibility, deformation adaptability, and structural integrability. Many ionic conductive elastomers have been developed as promising materials for wearable electronics; however, their spinning into fibers remains challenging due to the inherent conflict between ionic conductivity and mechanical robustness. Herein, inspired by Eucommia ulmoides gum (EUG), we develop a topological confinement strategy to construct all-solid-state ionic conductive elastomers featuring a hyperbranched-nanocluster-bridged network, thereby achieving high mechanical robustness and programmable viscoelasticity, which enables the direct spinning of ionic conductive fibers. The topological confinement achieved through hyperbranched nanoclusters couples a robust covalent network with a dynamic supramolecular network, enabling efficient stress dissipation while preserving segmental mobility required for ion transport. Meanwhile, the confined topology enhances intermolecular cohesion and stabilizes the integrity of the interwoven network in ionic conductive elastomers, endowing them with a broad processing window for direct spinning. We further demonstrate a simple yet scalable direct spinning of ionically conductive fibers and validate their practical versatility in multifunctional sensing applications. This work provides a general topology-guided design principle for spinnable ionic conductive elastomers and broadens the materials foundation for next-generation wearable fiber electronics.