Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, 610041, China.
College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China.
J Mater Chem B. 2024 Mar 20;12(12):3092-3102. doi: 10.1039/d3tb02748a.
Conductive hydrogel sensors have attracted attention for use in human motion monitoring detection, but integrating excellent biocompatibility, mechanical, self-adhesive, and self-healing properties, and high sensitivity into a hydrogel remains a challenge. In this work, a novel multifunctional conductive particle was designed and added to a polyacrylamide (PAM) matrix to prepare the hydrogel. It is worth noting that with the addition of polydopamine@poly(3,4-ethylenedioxythiophene) (PDA@PEDOT), the PAM/PDA@PEDOT hydrogel (PAPP hydrogel) showed excellent mechanical properties and high adhesion strength on different substrate surfaces. Meanwhile, the PAPP hydrogel shows outstanding self-healing properties, the mechanical properties of PAPP hydrogel broken from the middle recovered 92% tensile strength and 95% elongation at break after 12 h, respectively. Furthermore, assembled as strain wireless sensors, the PAPP sensor displays high sensitivity, where the gauge factor (GF) is 2.82, which can be used to accurately detect human facial micro-expressions and movements. Overall, the PAPP hydrogel with excellent mechanical, self-adhesive, and self-healing properties, and high sensitivity, demonstrated promise for use in wearable devices and bionic skins.
导电水凝胶传感器因其在人体运动监测检测中的应用而受到关注，但将优异的生物相容性、机械性能、自粘性、自修复性能和高灵敏度集成到水凝胶中仍然是一个挑战。在这项工作中，设计了一种新型多功能导电颗粒，并将其添加到聚丙烯酰胺 (PAM) 基质中以制备水凝胶。值得注意的是，随着聚多巴胺@聚(3,4-亚乙基二氧噻吩) (PDA@PEDOT) 的加入，PAM/PDA@PEDOT 水凝胶 (PAPP 水凝胶) 表现出优异的机械性能和对不同基底表面的高粘附强度。同时，PAPP 水凝胶表现出出色的自修复性能，从中部断裂的 PAPP 水凝胶的机械性能在 12 小时后分别恢复了 92%的拉伸强度和 95%的断裂伸长率。此外，组装为应变无线传感器，PAPP 传感器显示出高灵敏度，其应变系数 (GF) 为 2.82，可用于准确检测人体面部微表情和运动。总体而言，具有优异的机械性能、自粘性、自修复性能和高灵敏度的 PAPP 水凝胶有望用于可穿戴设备和仿生皮肤。
