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An environment-stable hydrogel with skin-matchable performance for human-machine interface

Science China Materials 2021年第9期64卷 2313-2324页

作者： Yang Gao Yuanrui Wang Shan Xia Guanghui Gao Polymeric and Soft Materials Laboratory School of Chemical EngineeringAdvanced Institute of Materials ScienceChangchun University of TechnologyChangchun 130012China

Ionic hydrogel-based sensors have shined a spotlight on wearable ***,the sensitivity and reliability of hydrogel devices are significantly hampered by the weak adhesion of skin-sensor interface as well as inferior temperature ***,inspired by the structure and composition of dermis,a novel skin-attachable and environment-stable hydrogel was designed by integrating collagen into the LiCl-containing chemically cross-linked polyacrylamide *** hydrogel exhibited skin-like mechanical properties of low modulus,superior stretchability as well as excellent ***,the introduction of collagen endowed the hydrogel with robust and seamless interfaces with diverse materials,including the curved *** a result,the hydrogel is capable of serving as a human-machine interface for collecting reliable electrocardiography(ECG)signals and discerning various human motions,with high sensitivity(gauge factor=10.7),fast response,negligible hysteresis as well as extensive monitoring ***,the hydrogel that can mimick the temperature-tolerant mechanism of most organisms possesses persistent stabilization of adhesive,conductive,sensory and mechanical performances at subzero or ambient *** skin-inspired strategy paves an effective way for the design of multifunctional materials with potential applications in next-generation electronics.

关键词： hydrogel human-machine interface skin-matchable self-adhesive environment-stable

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