摩擦电效应
自愈水凝胶
壳聚糖
导电体
材料科学
碳纳米管
极限抗拉强度
可穿戴技术
纳米技术
可穿戴计算机
复合材料
高分子化学
化学工程
计算机科学
工程类
嵌入式系统
作者
Ting Xie,Fung Suong Ou,Ningren Cui,Liang Tang,Zhichao Zhang,Yi Gao,Wei‐Ping Pan,Zequan Li,Wei Gao
标识
DOI:10.1016/j.carbpol.2024.121960
摘要
With the development of technology, there is a growing demand for wearable electronics that can fulfill different application scenarios. Hydrogel-based sensors are considered ideal candidates for realizing multifunctional wearable flexible devices. However, there are great challenges in preparing hydrogel-based sensors with both superior mechanical and electrical properties. Herein, we report a composite conductive hydrogel prepared by using a dynamically crosslinked carboxymethyl chitosan network and a covalently crosslinked polymer network, and carboxylated carbon nanotubes as conductive filler. The carboxymethyl chitosan-based hydrogels had excellent mechanical properties and strength (tensile strength of 475.4 kPa, and compressive strength of 1.9 MPa) and ultra-high conductivity (0.19 S·cm-1). Based on the above characteristics, the hydrogel could accurately identify the movement signals of the human body and different writing signals, and achieve encrypted transmission of signals, broadening the application scenarios. In addition, a triboelectric nanogenerator (TENG) was fabricated based on the hydrogel, which had an outstanding output performance with open-circuit voltage of 336 V, short-circuit current of 18 μA, transferred charge of 52 nC and maximum power density of 340 mW·m-2, and could power small devices. This work is expected to provide new ideas for the development of self-powered, multi-functional wearable, and flexible polysaccharide-based devices.
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