Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Flexible and Stretchable MXene/Waterborne Polyurethane Composite-Coated Fiber Strain Sensor for Wearable Motion and Healthcare Monitoring

Junming Cao
,
Yuanqing Jiang
,
Xiaoming Li
,
Xueguang Yuan
ORCID logo ,
Jinnan Zhang
ORCID logo ,
Qi He
,
Fei Ye
,
Geng Luo
,
Shaohua Guo
,
Yangan Zhang
,
Qi Wang
*
Version 1 : Received: 9 December 2023 / Approved: 11 December 2023 / Online: 11 December 2023 (09:34:38 CET)

A peer-reviewed article of this Preprint also exists.

Cao, J.; Jiang, Y.; Li, X.; Yuan, X.; Zhang, J.; He, Q.; Ye, F.; Luo, G.; Guo, S.; Zhang, Y.; Wang, Q. A Flexible and Stretchable MXene/Waterborne Polyurethane Composite-Coated Fiber Strain Sensor for Wearable Motion and Healthcare Monitoring. Sensors 2024, 24, 271. Cao, J.; Jiang, Y.; Li, X.; Yuan, X.; Zhang, J.; He, Q.; Ye, F.; Luo, G.; Guo, S.; Zhang, Y.; Wang, Q. A Flexible and Stretchable MXene/Waterborne Polyurethane Composite-Coated Fiber Strain Sensor for Wearable Motion and Healthcare Monitoring. Sensors 2024, 24, 271.

Abstract

Fiber-based flexible sensors have promising applications potential in human motion and healthcare monitoring, owing to their merits of lightweight, flexibility, and easy processing. Now, high-performance elastic fiber-based strain sensors with high sensitivity, large working range and excellent durability are in great demand. Herein, we have easily and quickly prepared a highly-sensitive, durable fiber-based strain sensor by dip-coating of highly-stretchable polyurethane (PU) elastic fiber in MXene/ waterborne polyurethane (WPU) dispersion solution. Benefiting from the electrostatic repulsion force between the negatively charged WPU and MXene sheets in the mixed solution, very homogeneous and stable MXene/WPU dispersion was successfully obtained and the interconnected conducting networks were correspondingly formed in coated MXene/WPU shell layer, which makes as-prepared strain sensor exhibit a gauge factor of over 960, a large sensing range of over 90% and detection limit as low as 0.5% strain. As elastic fiber and mixed solution have the same polymer constitute, tight bonding of MXene/WPU conductive composite on PU fibers was achieved, enabling the as-prepared strain sensor endure over 2500 stretching-releasing cycles and thus show good durability. Full-scale human motion detection was also performed by the strain sensor, and a body posture monitoring, analysis, and correction prototype system was developed via embedding the fiber-based strain sensors into sweater, strongly indicating the great application prospect in exercise, sports and healthcare.

Keywords

MXene; polyurethane; fiber; dip coating; strain sensor; motion detection; body posture; healthcare

Subject

Engineering, Electrical and Electronic Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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