Li Lumin, Ji Xiaofeng, Chen Kai
School of Resources and Chemical Engineering, 66283Sanming University, Sanming, Fujian, China.
117895Affiliated Sanming First Hospital of Fujian Medical University, Sanming, Fujian, China.
J Biomater Appl. 2023 Feb;37(7):1169-1181. doi: 10.1177/08853282221131137. Epub 2022 Oct 3.
The rapid development of flexible electronic technology has led to the in-depth study of flexible wearable sensors to achieve accurate sensing under different external stimuli. However, it is still a huge challenge to develop hydrogel-based wearable skin-like sensors with super ductility, high sensitivity, and self-healing properties. Herein, the TiC type of MXene was synthesized, and the Ag/MXene nanocomplexes were incorporated into polyvinyl alcohol-borax matrix to construct a novel composite hydrogel as the multifunctional nanofillers, which could bring both improved properties and novel functionalities. The Ag/MXene-Poly (vinyl alcohol) (PVA) hydrogel displayed integrated merits of highly strain sensitive (GF = 3.26), self-healing (within 10 min, 91% healing efficiency), and excellent antibacterial activity. The hydrogel could be assembled into a wearable skin-like sensor to monitor human movement, including large deformations (finger, elbow, wrist, and knee bending) and tiny deformations (mouth's movement and throat vocalization) in real time. Therefore, this work shed a new light on the development of flexible wearable skin-like sensors for the personalized healthcare monitoring, human-machine interfaces, and artificial intelligence.
柔性电子技术的快速发展促使人们对柔性可穿戴传感器进行深入研究，以实现不同外部刺激下的精确传感。然而，开发具有超延展性、高灵敏度和自愈合性能的水凝胶基可穿戴类皮肤传感器仍然是一个巨大的挑战。在此，合成了TiC型MXene，并将Ag/MXene纳米复合物掺入聚乙烯醇-硼砂基质中，构建了一种新型复合水凝胶作为多功能纳米填料，其既能改善性能又能带来新功能。Ag/MXene-聚乙烯醇（PVA）水凝胶具有高应变敏感性（GF = 3.26）、自愈合（10分钟内，愈合效率91%）和优异抗菌活性等综合优点。该水凝胶可组装成可穿戴类皮肤传感器，用于实时监测人体运动，包括大变形（手指、肘部、手腕和膝盖弯曲）和微小变形（嘴巴运动和喉咙发声）。因此，这项工作为用于个性化医疗监测、人机接口和人工智能的柔性可穿戴类皮肤传感器的发展提供了新的思路。
