A Strand Entangled Supramolecular PANI/PAA Hydrogel Enabled Ultra-Stretchable Strain Sensor

Liu, Dong, Zhou, Honghao, Zhao, Yuanyuan, Huyan, Chenxi, Wang, Zibi, Torun, Hamdi, Guo, Zhanhu, Dai, Sheng, Xu, Bin and Chen, Fei (2022) A Strand Entangled Supramolecular PANI/PAA Hydrogel Enabled Ultra-Stretchable Strain Sensor. Small, 18 (47). p. 2203258. ISSN 1613-6810

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Official URL: https://doi.org/10.1002/smll.202203258

Abstract

Hydrogel electronics have attracted growing interest for emerging applications in personal healthcare management, human-machine interaction, etc. Herein, a “doping then gelling” strategy to synthesize supramolecular PANI/PAA hydrogel with a specific strand entangled network is proposed, by doping the PANI with acrylic acid (AA) monomers to avoid PANI aggregation. The high-density electrostatic interaction between PAA and PANI chains serves as a dynamic bond to initiate the strand entanglement, enabling PAA/PANI hydrogel with ultra-stretchability (2830%), high breaking strength (120 kPa), and rapid self-healing properties. Moreover, the PAA/PANI hydrogel-based sensor with a high strain sensitivity (gauge factor = 12.63), a rapid responding time (222 ms), and a robust conductivity-based sensing behavior under cyclic stretching is developed. A set of strain sensing applications to precisely monitor human movements is also demonstrated, indicating a promising application prospect as wearable devices.

Item Type: Article
Additional Information: Funding information: This work was supported partially by the China Postdoctoral Science Foundation (2020M683469), the National Natural Science Foundation of China (No. 21803040), Young Talent Support Plan of Xi’an Jiaotong University and the Engineering and Physical Sciences Research Council (EPSRC, UK) grant -EP/N007921.
Uncontrolled Keywords: strain sensor, ultra-stretchable, hydrogel, doping effect, entanglement
Subjects: F200 Materials Science
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 26 Sep 2022 11:57
Last Modified: 25 Nov 2022 08:45
URI: https://nrl.northumbria.ac.uk/id/eprint/50222

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