This study examines the piezoresistive behavior of polyethylene (PE) composites containing different types of nano-particle fillers. The fillers investigated are single-wall carbon nanotube (SWNT), multi-wall carbon nanotube (MWNT) and graphene nanoplatelets (GNP), which were dispersed in PE through melt blending in concentrations ranging between 0.5–10 wt%. The lowest percolation threshold and highest electrical conductivity was found for SWNT composites, followed by MWNT and GNP. The piezoresistance of the nano-particle-PE composites was investigated and a negative piezoresistance behavior was observed signifying a reducing mean inter-particulate distance in the composites. The highest sensitivity was exhibited by MWNT and SWNT composites at compositions closer to the percolation threshold. The time dependence of piezoresistivity was also investigated through stress relaxation and cyclic loading experiments.
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ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 18–21, 2011
Scottsdale, Arizona, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5471-6
PROCEEDINGS PAPER
Effect of Nano-Particle Filler Type on the Piezoresistance of Polyethylene Composites
Reza Rizvi,
Reza Rizvi
University of Toronto, Toronto, ON, Canada
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Brendan Cochrane,
Brendan Cochrane
University of Toronto, Toronto, ON, Canada
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Elaine Biddiss,
Elaine Biddiss
Holland Bloorview Research Institute, Toronto, ON, Canada
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Hani Naguib
Hani Naguib
University of Toronto, Toronto, ON, Canada
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Reza Rizvi
University of Toronto, Toronto, ON, Canada
Brendan Cochrane
University of Toronto, Toronto, ON, Canada
Elaine Biddiss
Holland Bloorview Research Institute, Toronto, ON, Canada
Hani Naguib
University of Toronto, Toronto, ON, Canada
Paper No:
SMASIS2011-5136, pp. 157-163; 7 pages
Published Online:
February 7, 2012
Citation
Rizvi, R, Cochrane, B, Biddiss, E, & Naguib, H. "Effect of Nano-Particle Filler Type on the Piezoresistance of Polyethylene Composites." Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 157-163. ASME. https://doi.org/10.1115/SMASIS2011-5136
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