This study focuses on the characterization of a porous multifunctional elastomer-CNT nanocomposites for potential use as pressure sensors. A thermoplastic polyurethane (TPU) was chosen as an elastomeric matrix, which was reinforced with multiwall carbon nanotubes (0–10 wt%) by high shear twin screw extrusion mixing. Porosity was introduced to the composites through the phase separation of a single TPU-CO2 solution. Interactions between MWNT and TPU were elucidated through calorimetry, gravimetric decomposition, conductivity measurements and microstructure imaging. The piezoresistance (pressure-resistance) behavior of the nanocomposites was investigated and found to be dependent on MWNT concentration and nanocomposite microstructure.
Volume Subject Area:
Development and Characterization of Multifunctional Materials
Topics:
Nanocomposites,
Pressure,
Multi-walled nanotubes,
Calorimetry,
Carbon nanotubes,
Composite materials,
Elastomers,
Electrical conductivity,
Extruding,
Imaging,
Multi-walled carbon nanotubes,
Phase separation,
Porosity,
Pressure sensors,
Screws,
Shear (Mechanics),
Thermal conductivity,
Urethane elastomers
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Copyright © 2012 by ASME
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