聚吡咯
聚丙烯酰胺
标度系数
压阻效应
材料科学
生物相容性
导电体
韧性
自愈
导电聚合物
自愈水凝胶
应变计
纳米技术
复合材料
聚合物
高分子化学
聚合
冶金
替代医学
病理
制作
医学
作者
Yansong Zhang,Shuo Li,Zhongda Gao,Dejin Bi,Na Qu,Sanqing Huang,Xueqin Zhao,Renhong Li
标识
DOI:10.1016/j.carbpol.2023.120953
摘要
Conductive hydrogels have attracted widespread attention because of their integrated characteristics of being stretchable, deformable, adhesive, self-healable, and conductive. Herein, we report a highly conductive and tough double-network hydrogel based on a double cross-linked polyacrylamide (PAAM) and sodium alginate (SA) network with conducting polypyrrole nanospheres (PPy NSs) uniformly distributed in the network (PAAM-SA-PPy NSs). SA was employed as a soft template for synthesis of PPy NSs and distribution of PPy NSs uniformly in the hydrogel matrix to construct SA-PPy conductive network. The PAAM-SA-PPy NS hydrogel exhibited both high electrical conductivity (6.44 S/m) and excellent mechanical properties (tensile strength of 560 kPa at 870 %), as along as high toughness, high biocompatibility, good self-healing and adhesion properties. The assembled strain sensors showed high sensitivity and a wide sensing range (a gauge factor of 1.89 for 0–400 % strain and 4.53 for 400–800 % strain, respectively), as well as fast responsiveness and reliable stability. When used as a wearable strain sensor, it was able to monitor a series of physical signals from human large-scale joint motions and subtle muscle movements. This work provides a new strategy for the development of electronic skins and flexible strain sensors.
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