Dynamic Network- and Microcellular Architecture-Driven Biomass Elastomer toward Sustainable and Versatile Soft Electronics

Conductive elastomers combining micromechanical sensitivity, lightweight adaptability, and environmental sustainability are critically needed for advanced flexible electronics requiring precise responsiveness and long-term wearability; however, the integration of these properties remains a significant challenge. Here, we present a biomass-derived conductive elastomer featuring a rationally engineered dynamic crosslinked network integrated with a tunable microporous architecture. This structural design imparts pronounced micromechanical sensitivity, an ultralow density (~ 0.25 g cm^-3), and superior mechanical compliance for adaptive deformation. Moreover, the unique micro-spring effect derived from the porous architecture ensures exceptional stretchability (> 500% elongation at break) and superior resilience, delivering immediate and stable electrical response under both subtle (< 1%) and large (> 200%) mechanical stimuli. Intrinsic dynamic interactions endow the elastomer with efficient room temperature self-healing and complete recyclability without compromising performance. First-principles simulations clarify the mechanisms behind micropore formation and the resulting functionality. Beyond its facile and mild fabrication process, this work establishes a scalable route toward high-performance, sustainable conductive elastomers tailored for next-generation soft electronics.