Hierarchically engineered Janus fiber-hydrogel architecture: An ultrathin biomimetic skin for multiple-response sensing
Hydrogels served as core materials for wearable sensors in recent years, yet their practical application was constrained by water-loss-induced instability, suboptimal mechanical properties, and insufficient functionality in complex scenarios. To overcome these challenges, this study innovatively engineered a Janus fiber scaffold-based composite hydrogel biomimetic skin with a triple humidity-responsive mechanism, achieving substantial breakthroughs in performance optimization and multifunctional integration. HSBS leveraged triple humidity response mechanisms: chitosan-gelatin buffering, Janus scaffolds' unidirectional conduction, and LiCl deliquescence, achieving high hygroscopic sensitivity across 30–90 % RH. Concurrently, the HSBS exhibited wide temperature adaptability from −20 °C to 50 °C, exceptional strain-sensing stability, and mechanical durability, with a water retention rate of 76 % at room temperature and a tensile strength of 3.09 MPa. It could also precisely detect variations in skin temperature and humidity, as well as fluctuations in physiological signals. Endowed with a triple humidity-responsive mechanism as its core advantage, this novel biomimetic skin was poised to significantly expand the application frontier of wearable sensors in domains such as healthcare monitoring and sports science.
危险品化学品经营许可证（带存储）