Journal
CHEMICAL ENGINEERING JOURNAL
Volume 438, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.135600
Keywords
Flexible strain sensors; Juncus effusus; Biomass-derived strain sensors; Three-dimensional reticular structure; Sensitivity
Categories
Funding
- Deakin University and Wuhan Textile University (WTU) through the Deakin-WTU Joint PhD Program
- National Natural Science of China [21905214]
- Foundation of Science Research Program from the Hubei Provincial Department of Education [Q20201711]
- Opening Project of State Key Laboratory of Silkworm Genome Biology, Ministry of Agriculture, Southwest Univer-sity
- [sklsgb-2019KF08]
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In this study, a fiber-based stretchable strain sensor with a unique three-dimensional (3D) reticular structure was reported for human motion monitoring, displaying high sensitivity and stretchability. The sensor can accurately detect a full range of body motions and subtle signals, and has potential as a Morse code generator for cryptographic communication.
Flexible strain sensors have received extensive attention owing to their booming development. However, achieving high sensitivity and stretchability simultaneously for strain sensors is still a challenge. Herein, we report a fiber-based stretchable strain sensor with a unique three-dimensional (3D) reticular structure for human motion monitoring. The biomass Juncus effusus (JE) fiber was functionalized with carbon nanotubes (CNTs) and Ecoflex (EF) using a facile dip-coating-drying approach, and a syringe extraction method, respectively. The resulted JE/CNTs/EF fiber strain sensors exhibited advanced performance of strong flexibility, high sensitivity, and multifunctionality, which displayed a superior sensitivity (gauge factor of 24.95-76.79) and high stretchability (600%). Moreover, good repellency to chemicals and stable responses to various stimuli frequencies over 270 cycles were obtained for the as-prepared sensors. The microfibrils of the JE fiber formed a complicated 3D reticular structure acting as the conductive bridges when stretching. Consequently, the fiber-based JE/CNTs/EF strain sensor can not only accurately detect a full range of body motions and subtle signals, but also can be a promising candidate as a Morse code generator for cryptographic communication.
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