Conductive hydrogels are crucial to intelligent robotics and wearable devices, but their adoption is hindered by limited functionality and energy‐intensive petrochemical synthesis. To address this challenge, a nanolignins (NLs)‐reinforced polyacrylamide hydrogel (NL@PAM) was prepared via a green strategy at room temperature. Lignin nanoparticles were synthesized by a green method and integrated into the polyacrylamide network through extensive hydrogen bonding and interchain interactions. This structure imparts the NL@PAM hydrogel with a unique combination of mechanical and functional properties, including high tensile strength (1.32 MPa), ultrahigh stretchability (1880%), strong self‐adhesion (196 kPa), and high ionic conductivity (13.96 mS cm −1 ). As a demonstration, the hydrogel was used as a wearable sensor on human fingers; it converted real‐time finger movements into control signals for a robotic arm, which faithfully replicated the gestures. These results demonstrate a high‐performance multifunctional hydrogel and establish a sustainable paradigm for soft electronics, leveraging green chemistry and renewable biomass for future intelligent systems.
Song et al. (Mon,) studied this question.
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