TY - JOUR
T1 - A Strand Entangled Supramolecular PANI/PAA Hydrogel Enabled Ultra-Stretchable Strain Sensor
AU - Liu, Dong
AU - Zhou, Honghao
AU - Zhao, Yuanyuan
AU - Huyan, Chenxi
AU - Wang, Zibi
AU - Torun, Hamdi
AU - Guo, Zhanhu
AU - Dai, Sheng
AU - Xu, Ben Bin
AU - Chen, Fei
N1 - 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.
PY - 2022/11/24
Y1 - 2022/11/24
N2 - 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.
AB - 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.
KW - strain sensor
KW - ultra-stretchable
KW - hydrogel
KW - doping effect
KW - entanglement
UR - http://www.scopus.com/inward/record.url?scp=85139611778&partnerID=8YFLogxK
U2 - 10.1002/smll.202203258
DO - 10.1002/smll.202203258
M3 - Article
VL - 18
JO - Small
JF - Small
SN - 1613-6810
IS - 47
M1 - 2203258
ER -
