College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
J Mater Chem B. 2019 Sep 25;7(37):5704-5712. doi: 10.1039/c9tb01214a.
Conductive materials including graphene, metal and conjugated polymers, combined with self-healing hydrogels are attracting increasing attention in biosensors and bioelectrodes. In this work, we propose one self-healing conductive hydrogel with good morphology and performance based on an alginate-gelatin network and polypyrrole (Ppy) via low-temperature fabrication. The alginate/gelatin network consists of extensive reversible Schiff base units that can act as dynamic crosslinking agents to self-heal the hydrogel. Ppy as one conductive polymer provides the hydrogel with conductivity and good mechanical properties. To demonstrate the applications, we insert the hydrogel into a disconnected circuit to repair or act as one component to light up bulbs. In addition, the conductive hydrogel possesses mechanical responses towards bending or compression, thus it can monitor hand movements and paves the way to a flexible, mechanical sensor. This work proposes a facile method to fabricate one novel self-healing conductive hydrogel and demonstrates its applications in repairable circuits and mechanical sensors that may have potential prospects in circuit repair materials, biocompatible/medical devices, and flexible sensors.
导电材料包括石墨烯、金属和共轭聚合物，与自修复水凝胶结合，在生物传感器和生物电极中引起了越来越多的关注。在这项工作中，我们提出了一种基于海藻酸钠-明胶网络和聚吡咯（Ppy）的低温制备的具有良好形态和性能的自修复导电水凝胶。海藻酸钠/明胶网络由广泛的可逆席夫碱单元组成，可作为动态交联剂自修复水凝胶。Ppy 作为一种导电聚合物为水凝胶提供了导电性和良好的机械性能。为了展示应用，我们将水凝胶插入断开的电路中，以修复或充当一个组件来点亮灯泡。此外，导电水凝胶对弯曲或压缩具有机械响应，因此可以监测手部运动，为柔性机械传感器铺平道路。这项工作提出了一种简便的方法来制备一种新型的自修复导电水凝胶，并展示了其在可修复电路和机械传感器中的应用，这些应用可能在电路修复材料、生物相容性/医疗设备和柔性传感器方面具有广阔的前景。
