High toughness and self-healing conductive hydrogels of chitosan-poly acrylic acid-MXene and capability for strain sensors

被引：0
|
作者：
Li Z. [1 ]
Deng X. [1 ]
Han W. [1 ]
Xie Z. [1 ]
Cai S. [1 ]
Peng X. [1 ]
机构：
[1] Key Laboratory of Optoelectrochemical Materials and Devices, Jianghan University, Ministry of Education, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2024年 / 41卷 / 04期
基金：
中国国家自然科学基金;
关键词：
chitosan; conductive hydrogels; mechanical properties; MXene; strain sensor;
D O I：
10.13801/j.cnki.fhclxb.20231031.005
中图分类号：
学科分类号：
摘要：
Chitosan-based conductive hydrogels have attracted extensive attention in electronic skins, human health monitoring, and flexible wearable sensors. In this work, MXene was dispersed in acrylic acid-chitosan solution, and then the acrylic acid monomer was in situ polymerized to synthesis the chitosan-poly(acrylic acid)-MXene hydrogels (CS-PAA-MXene). CS-PAA-MXene shows excellent mechanical properties. The tensile strength of the CS-PAA-MXene is as high as 0.6 MPa, and its elongation at break and toughness reach 1 450% and 2.6 MJ·m−3, respectively. CS-PAA-MXene can adhere to various surfaces, including glass, plastic, rubber, copper and aluminum, etc. The maximum peeling force on the glass can reach 175 N·m−1. After the cut CS-PAA-MXene contacts each other for 2.5 s, its resistance value returns to the pre-cut value, suggesting CS-PAA-MXene has excellent self-healing performance. CS-PAA-MXene strain sensors have been successfully used to detect a wide range of human movements, such as the joint flexions of finger, elbow and knee. Due to the cationic charge and antibacterial properties of chitosan, CS-PAA-MXene conductive hydrogels will have a good application prospect in self-adhesive and high-extensibility flexible sensors. © 2024 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：2074 / 2082
页数：8
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