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A ternary heterogeneous hydrogel with strength elements for resilient, self-healing, and recyclable epidermal electronics
npj Flexible Electronics ( IF 14.6 ) Pub Date : 2022-06-21 , DOI: 10.1038/s41528-022-00175-7
Ziya Wang, Xiuru Xu, Yingtian Xu, Waner Lin, Zhengchun Peng

Epidermal sensing devices, which mimic functionalities and mechanical properties of natural skin, offer great potential for real-time health monitoring via continuous checking of vital signs. However, most existing skin-mounted electronics use a flexible film with high elastic modulus, which hinders physical activity and causes interfacial delamination and skin irritation. The compliance of hydrogel-based devices can firmly conform to complex, curved surfaces without introducing excessive interfacial stresses. However, most hydrogels still suffer from the weakness of stable and reproducible sensing. In this work, we report a skin-friendly epidermal electronic made of a resilient, self-healing, and recyclable polyvinyl alcohol (PVA) hydrogel. The hydrogel is reinforced through a ternary heterogeneous network for good mechanical robustness while maintaining high stretchability and exceptional conformability. Simultaneously, the abundant dynamic hydrogen bonds give the hydrogel rapid self-healing ability. The assembled hydrogel epidermal electronic is able to stably monitor multiple physiological signals as well as sense the strain level of the skin motion and joint bending. The unique, versatile, environmental and biological friendly epidermal electronics will have broad applications in health care, human-machine interface, augmented reality, and so on.



中文翻译:

一种三元异质水凝胶,具有用于弹性、自愈和可回收的表皮电子器件的强度元件

模拟天然皮肤的功能和机械特性的表皮传感设备通过连续检查生命体征为实时健康监测提供了巨大潜力。然而,大多数现有的皮肤贴装电子产品都使用具有高弹性模量的柔性薄膜,这会阻碍身体活动并导致界面分层和皮肤刺激。基于水凝胶的装置的柔顺性可以牢固地适应复杂的曲面,而不会引入过多的界面应力。然而,大多数水凝胶仍然存在稳定和可重复传感的弱点。在这项工作中,我们报告了一种由弹性、自我修复和可回收的聚乙烯醇 (PVA) 水凝胶制成的亲肤表皮电子产品。水凝胶通过三元异质网络得到增强,具有良好的机械强度,同时保持高拉伸性和出色的顺应性。同时,丰富的动态氢键赋予水凝胶快速的自愈能力。组装的水凝胶表皮电子能够稳定地监测多种生理信号,以及感知皮肤运动和关节弯曲的应变水平。独特、多功能、环保和生物友好的表皮电子产品将在医疗保健、人机界面、增强现实等方面有广泛的应用。组装的水凝胶表皮电子能够稳定地监测多种生理信号,以及感知皮肤运动和关节弯曲的应变水平。独特、多功能、环保和生物友好的表皮电子产品将在医疗保健、人机界面、增强现实等方面有广泛的应用。组装的水凝胶表皮电子能够稳定地监测多种生理信号,以及感知皮肤运动和关节弯曲的应变水平。独特、多功能、环保和生物友好的表皮电子产品将在医疗保健、人机界面、增强现实等方面有广泛的应用。

更新日期:2022-06-21
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