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

LI Zeyu; DENG Xialing; HAN Wei; XIE Zukun; CAI Shaojun; PENG Xianghong

doi:10.13801/j.cnki.fhclxb.20231031.005

Volume 41 Issue 4

Apr. 2024

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Article Navigation > Acta Materiae Compositae Sinica > 2024 > 41(4): 2074-2082

LI Zeyu, DENG Xialing, HAN Wei, et al. High toughness and self-healing conductive hydrogels of chitosan-poly acrylic acid-MXene and capability for strain sensors[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2074-2082. doi: 10.13801/j.cnki.fhclxb.20231031.005

Citation:

LI Zeyu, DENG Xialing, HAN Wei, et al. High toughness and self-healing conductive hydrogels of chitosan-poly acrylic acid-MXene and capability for strain sensors[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2074-2082. doi: 10.13801/j.cnki.fhclxb.20231031.005

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

doi: 10.13801/j.cnki.fhclxb.20231031.005

Key Laboratory of Optoelectrochemical Materials and Devices, Jianghan University, Ministry of Education, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, China

Funds: National Natural Science Foundation of China (52103213); Plan of Jianghan University (2021yb019)

Received Date: 2023-07-25
Accepted Date: 2023-10-10
Rev Recd Date: 2023-09-15

Available Online: 2023-11-01

Publish Date: 2024-04-15

Abstract

Abstract

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 1450% 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.
- chitosan,
- MXene,
- conductive hydrogels,
- mechanical properties,
- strain sensor
Long Abstrsct
Innovation Points

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References(38)

References

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