This work developed a facile approach to fabricate highly sensitive and flexible polyurethane/graphene platelets composite film for wearable strain sensor. The composite film was fabricated via layer-by-layer laminating method which is simple and cost-effective; it exhibited outstanding electrical conductivity of 1430 ± 50 S/cm and high sensitivity to strain (the gauge factor is up to 150). In the sensor application test, the flexible strain sensor achieves real-time monitoring accurately for five bio-signals such as pulse movement, finger movement, and cheek movement giving a great potential as wearable-sensing device. In addition, the developed strain sensor shows response to pressure and temperature in a certain region. A multifaceted comparison between reported flexible strain sensors and our strain sensor was made highlighting the advantages of the current work in terms of (1) high sensitivity (gauge factor) and flexibility, (2) facile approach of fabrication, and (3) accurate monitoring for body motions.
Bibliographical noteThe final publication is available at Springer via http://dx.doi.org/10.1007/s10853-019-03650-1
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- Composite films;
- Electrical conductivity;
- Strain sensor;
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Materials Science(all)
- School of Mechanical, Aerospace and Automotive Engineering - Lecturer in Mechanical and Automotive Engineering Design
- Institute for Future Transport and Cities - Associate
Person: Teaching and Research