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

Dong Liu, Honghao Zhou, Yuanyuan Zhao, Chenxi Huyan, Zibi Wang, Hamdi Torun, Zhanhu Guo, Sheng Dai, Ben Bin Xu*, Fei Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)
53 Downloads (Pure)


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.
Original languageEnglish
Article number2203258
Number of pages9
Issue number47
Early online date10 Oct 2022
Publication statusPublished - 24 Nov 2022


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