Journal
IEEE SENSORS JOURNAL
Volume 13, Issue 10, Pages 4045-4048Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2013.2272098
Keywords
Carbon nanotubes; chemical vapor sensing; deformation sensing; polymer composite
Funding
- Operational Program Education for Competitiveness
- European Social Fund (ESF)
- national budget of Czech Republic [CZ.1.07/2.3.00/20.0104]
- Centre of Polymer Systems [CZ.1.05/2.1.00/03.0111]
- Institute of Hydrodynamics [AV0Z20600510]
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A sensor was made of a polymer composite composed of electrically-conductive carbon nanotubes embedded in elastic polyurethane. The composite was prepared using a polyurethane filter membrane, enmeshing it, and melding together with carbon nanotubes. Testing has shown that the composite can be elongated as much as 400% during which the electrical resistance is increased 270 times. The composite is also sensitive to compression and to organic solvent vapors. These properties indicate the composite could have applications as a highly-deformable strain and chemical vapors sensing element and also as flexible electromagnetic shielding or protection against lightning. As an example of the use of the composite as a strain sensor, the pressure variation between a shoe and floor during walking and knee flexion during cycling has been monitored.
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