As noninvasive wearable electronic devices, epidermal sensors enable continuous, real-time, and remote monitoring of various human physiological parameters. Conductive biomaterials-based hydrogels as sensor matrix materials have good biocompatibility, biodegradability, and efficient stimulus response capabilities and are widely applied in motion monitoring, healthcare, and human–machine interaction. However, biomass hydrogel-based epidermal sensing devices still need excellent mechanical properties, prolonged stability, multifunctionality, and extensive practicality. Therefore, this paper reviews the common biomass hydrogel materials for epidermal sensing (proteins, polysaccharides, polyphenols, etc.) and the various types of noninvasive sensing devices (strain/pressure sensors, temperature sensors, glucose sensors, electrocardiograms, etc.). Moreover, this review focuses on the strategies of scholars to enhance sensor properties, such as strength, conductivity, stability, adhesion, and self-healing ability. This work will guide the preparation and optimization of high-performance biomaterials-based hydrogel epidermal sensors.

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用于无创表皮传感器的导电且环保的生物材料水凝胶：综述

表皮传感器作为无创可穿戴电子设备，能够连续、实时、远程监测人体各种生理参数。基于导电生物材料的水凝胶作为传感器基质材料具有良好的生物相容性、生物可降解性和高效的刺激响应能力，广泛应用于运动监测、医疗保健和人机交互等领域。然而，基于生物质水凝胶的表皮传感装置仍然需要优异的机械性能、长期的稳定性、多功能性和广泛的实用性。因此，本文综述了用于表皮传感的常见生物质水凝胶材料（蛋白质、多糖、多酚等）和各类无创传感装置（应变/压力传感器、温度传感器、葡萄糖传感器、心电图等）。此外，本文重点讨论了学者们增强传感器性能的策略，如强度、导电性、稳定性、粘附性和自愈能力。这项工作将指导基于高性能生物材料的水凝胶表皮传感器的制备和优化。