A temperature sensor based on a MWCNT/SEBS nanocomposite

The fabrication of a temperature sensor based on multi-walled carbon nanotubes (MWCNTs)/styrene-b-(ethylene-co-butylene)-b-styrene (SEBS) triblock copolymer composite is reported. The device was realized by drop casting 10μl of a MWCNTs dispersion in a toluene solution of SEBS onto gold electrodes f...

Full description

Saved in:
Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2012-05, Vol.178, p.94-99
Main Authors: Matzeu, G., Pucci, A., Savi, S., Romanelli, M., Di Francesco, F.
Format: Article
Language:English
Subjects:
Devices
Dispersions
Electrodes
Heating
MWCNT
Nanocomposites
Nanomaterials
Nanostructure
Polymer nanocomposite
SEBS
Sensor
Temperature
Temperature sensors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The fabrication of a temperature sensor based on multi-walled carbon nanotubes (MWCNTs)/styrene-b-(ethylene-co-butylene)-b-styrene (SEBS) triblock copolymer composite is reported. The device was realized by drop casting 10μl of a MWCNTs dispersion in a toluene solution of SEBS onto gold electrodes fabricated onto a polyimide support. Thermogravimetric and electrical resistance measurements highlighted a good reproducibility of film composition and sensing properties. A negative temperature coefficient with an absolute value comparable to the highest values in metals was measured when a substantial amount of MWCNTs was incorporated into the nanocomposite (40% by weight), and a five-fold increase was observed close to the percolation threshold. Though such sensitivity seems to be partly lost after the first heating, the results allowed us to be optimistic about the feasibility of realizing nanocomposite films with temperature sensitivities comparable to that of common thermistors in the range 20–60°C.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2012.02.043