Journal
APPLIED PHYSICS LETTERS
Volume 108, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4939265
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Funding
- National Natural Science Foundation of China-Henan Talents Fostering joint Funds [U1204507]
- National Natural Science Foundation Item [11572290, 11432003]
- Special Science Foundation for Excellent Youth Scholars of Zhengzhou University [1421320041]
- University of Tennessee
- China Scholarship Council
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Ultrahigh compressibility has been observed in the lightweight porous carbon nanotube (CNT)-thermoplastic polyurethane (TPU) nanocomposites prepared by the thermally induced phase separation (TIPS) technique. The porous structure has significantly reduced the density to approximately 0.1 g.cm(-3). The nanocomposites prepared with a sonication time of 16 min and a filler content of 0.51 vol. % possess uniform CNT distribution and show the highest saturated electrical conductivity. Furthermore, the observed CNT-dependent cell structure changes indicate that the added CNTs favor the formation of thicker and stronger cell structure to enhance its reproductivity as a piezoresistive sensor. Piezoresistive behaviors were then conducted under stepwise and cyclic compression. The porous nanocomposites possess fast sensing capacity over a wide strain range (up to 90%). In addition, good piezoresistive recoverability and reproducibility were observed in the nanocomposites after stabilization by cyclic compression. This study provides a guideline for fabricating porous electrically conductive nanocomposites as promising candidates for the flexible, high sensitive, and stable piezoresistance sensors. (C) 2016 AIP Publishing LLC.
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