材料科学
纳米复合材料
导电体
数码产品
电导率
自愈水凝胶
纳米技术
电极
柔性电子器件
摩擦电效应
复合材料
光电子学
电气工程
工程类
物理化学
化学
高分子化学
作者
Hongling Sun,Yi Zhao,Sulin Jiao,Chunfeng Wang,Yanyan Jia,Kun Dai,Guoqiang Zheng,Chuntai Liu,Pengbo Wan,Changyu Shen
标识
DOI:10.1002/adfm.202101696
摘要
Abstract Conductive hydrogels (CHs) have been highlighted in the design of flexible strain sensors and stretchable triboelectric nanogenerators (TENGs) on the basis of their excellent physicochemical properties such as large stretchability and high conductivity. Nevertheless, the incident freezing and drying behaviors of CHs by using water solvent as the dispersion medium limit their application scopes significantly. Herein, an environment tolerant and ultrastretchable organohydrogel is demonstrated by a simple solvent‐replacement strategy, in which the partial water in the as‐synthesized polyacrylamide/montmorillonite/carbon nanotubes hydrogel is replaced with the glycerol, leading to excellent temperature toleration (−60 to 60 °C) and good stability (30 days under normal environment) without sacrificing the stretchability and conductivity. The organohydrogel exhibits an ultrawide strain sensing range (0–4196%) with a high sensitivity of 8.5, enabling effective detection and discrimination of human activities that are gentle or drastic under various conditions. Furthermore, the organohydrogel is assembled in a single‐electrode TENG, which displays excellent energy harvesting ability even under a stretchability of 500% and robustness to directly power wearable electronics in harsh cold conditions. This work inspires a simple route for multifunctional organohydrogel and promises the practical application of flexible and self‐powered wearable devices in extreme environments.
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