TY - JOUR
T1 - Bifunctional organic/inorganic nanocomposites for energy harvesting, actuation and magnetic sensing applications
AU - Fiorido, Tomas
AU - Galineau, Jérémy
AU - Salles, Vincent
AU - Seveyrat, Laurence
AU - Belhora, Fouad
AU - Cottinet, Pierre Jean
AU - Hu, Ling
AU - Liu, Yang
AU - Guiffard, Benoît
AU - Moortele, Agnès Bogner Van De
AU - Epicier, Thierry
AU - Guyomar, Daniel
AU - Brioude, Arnaud
PY - 2014/5
Y1 - 2014/5
N2 - The fabrication of a single material being a competitive actuator as well as an electric current generator is no longer a challenge. This article presents novel nanocomposites based on a polyurethane (PU) matrix containing (0-5 wt.%) iron carbide-based nanofillers (Fe3C@C) fabricated by electrospinning. Such materials have both electrostrictive and magnetoelectric properties. The introduction of conductive fillers in PU, which is a good candidate for actuating applications, improved the electro-mechanical coupling due to an increase in the composite permittivity. A significant increase of the dielectric permittivity and an almost 7 fold gain for the deflection strain under 17 V/μm were measured on a diaphragm-type actuator for the PU-2.5 wt.% Fe3C@C nanocomposite. It was shown that a higher loading led to reduced actuation properties, probably due to the presence of Fe3C aggregates in the composite as shown by Focused Ion Beam characterization. The magnetoelectric (ME) properties of the nanocomposites still showed an increase for contents over 2.5 wt.%. The current generated by the nanocomposite, when subjected to a magnetic field, was comparable or higher than several ceramic materials and at least 100 times higher than polymer-based systems studied for their ME behavior.
AB - The fabrication of a single material being a competitive actuator as well as an electric current generator is no longer a challenge. This article presents novel nanocomposites based on a polyurethane (PU) matrix containing (0-5 wt.%) iron carbide-based nanofillers (Fe3C@C) fabricated by electrospinning. Such materials have both electrostrictive and magnetoelectric properties. The introduction of conductive fillers in PU, which is a good candidate for actuating applications, improved the electro-mechanical coupling due to an increase in the composite permittivity. A significant increase of the dielectric permittivity and an almost 7 fold gain for the deflection strain under 17 V/μm were measured on a diaphragm-type actuator for the PU-2.5 wt.% Fe3C@C nanocomposite. It was shown that a higher loading led to reduced actuation properties, probably due to the presence of Fe3C aggregates in the composite as shown by Focused Ion Beam characterization. The magnetoelectric (ME) properties of the nanocomposites still showed an increase for contents over 2.5 wt.%. The current generated by the nanocomposite, when subjected to a magnetic field, was comparable or higher than several ceramic materials and at least 100 times higher than polymer-based systems studied for their ME behavior.
KW - Composite
KW - Electrospinning
KW - Electrostriction
KW - Iron carbide
KW - Magnetoelectric effect
UR - http://www.scopus.com/inward/record.url?scp=84897527092&partnerID=8YFLogxK
U2 - 10.1016/j.sna.2014.02.010
DO - 10.1016/j.sna.2014.02.010
M3 - Article
AN - SCOPUS:84897527092
SN - 0924-4247
VL - 211
SP - 105
EP - 114
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
ER -