Sensors | |
Stretchable and Flexible High-Strain Sensors Made Using Carbon Nanotubes and Graphite Films on Natural Rubber | |
Sreenivasulu Tadakaluru1  Wiradej Thongsuwan1  | |
[1] Materials Science Research Center, Department of Physics and Materials Science, Faculty of Science, Chiangmai University, Chiangmai 50200, Thailand; | |
关键词: piezoresistive sensor; soft wearable sensors; electro-mechanical properties; film composite; stretchable device; carbon nanotubes; health monitoring; | |
DOI : 10.3390/s140100868 | |
来源: mdpi | |
【 摘 要 】
Conventional metallic strain sensors are flexible, but they can sustain maximum strains of only ∼5%, so there is a need for sensors that can bear high strains for multifunctional applications. In this study, we report stretchable and flexible high-strain sensors that consist of entangled and randomly distributed multiwall carbon nanotubes or graphite flakes on a natural rubber substrate. Carbon nanotubes/graphite flakes were sandwiched in natural rubber to produce these high-strain sensors. Using field emission scanning electron microscopy, the morphology of the films for both the carbon nanotube and graphite sensors were assessed under different strain conditions (0% and 400% strain). As the strain was increased, the films fractured, resulting in an increase in the electrical resistance of the sensor; this change was reversible. Strains of up to 246% (graphite sensor) and 620% (carbon nanotube sensor) were measured; these values are respectively ∼50 and ∼120 times greater than those of conventional metallic strain sensors.
【 授权许可】
CC BY
© 2014 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
Files | Size | Format | View |
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RO202003190030162ZK.pdf | 927KB | download |