摘要
Soft iontronic materials are highly desirable for flexible electronics that operate under deformation and temperature fluctuations, yet practical platforms that combine solid state ionic transport, mechanical robustness, and reprocessability while integrating multiple responsive functions remain limited. Here, a series of X-PEG networks is constructed by integrating acylurea based dynamic covalent linkages, semicrystalline poly(ethylene glycol) segments, and a homogeneously dispersed imidazolium ionic liquid phase. This architecture couples dynamic exchange, associative reinforcement, and reversible crystallinity within one matrix, enabling microstructure governed regulation of mechanics and ion transport. A broad mechanical window is achieved across compositions, with high stretchability and useful strength retained at representative formulations, while ionic conduction is maintained in the 10 −3 to 10 −2 mS·cm −1 range. Robust electromechanical coupling is demonstrated by smooth and repeatable resistance outputs under bending and subtle physiological motions, together with stable cycling performance. Rapid thermal following and heat triggered shape regulation are enabled through PEG crystallization and melting coordinated with relaxation of hydrogen bonded hard domains. Notably, heating produces a resistance decrease that supports temperature triggered circuit warning, consistent with thermally driven microphase reconstruction, primarily through the melting of crystalline domains, which improves the effective connectivity of ion-conducting pathways. The networks are melt-reprocessable, and ionic conductivity as well as strain and temperature responsive sensing outputs are largely preserved after repeated hot pressing cycles. This work establishes a recyclable ionic network platform in which dynamic bonding and semicrystalline switching jointly program microstructure and function, offering a practical materials strategy for sustainable soft iontronic devices.
危险品化学品经营许可证（带存储）