Piezoelectric properties of polyamide 11/NaNbO3nanowire composites

Charlotte David (1) , Jean-Fabien Capsal (2) , Lydia Laffont-Dantras (1) , Eric Dantras (1) , Colette Lacabanne (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 LGEF - Laboratoire de Génie Electrique et Ferroélectricité

Polyamide 11(PA 11)/sodium niobate nanowire (NW) 0-3 composites with different volume fractions of NWs were synthesized. The electric polarization (P) was measured as a function of the applied electric field (E). The P-E hysteresis loop was used to work out the remanent polarization Pr of these materials. The dielectric permittivity and the piezoelectric strain constant were determined. Good impedance matching between inorganic and organic phases leads to higher electroactivity than conventional lead-free 0-3 composites. The piezoelectric voltage of the PA 11/NaNbO3 NW composites is of the same order as those obtained for fluorinated piezoelectric polymers. These composites could have some applications in flexible, low-cost, environmentally friendly piezoelectric sensors and actuators.

Mots clés: PA 11 composite; Nanowire : dielectric permittivity; Piezoelectric sensor

Domaines: Matériaux

Charlotte David, Jean-Fabien Capsal, Lydia Laffont-Dantras, Eric Dantras, Colette Lacabanne. Piezoelectric properties of polyamide 11/NaNbO3nanowire composites. Journal of Physics D: Applied Physics, 2012, vol. 45 (n° 41), pp. 1-7. ⟨10.1088/0022-3727/45/41/415305⟩. ⟨hal-00822238⟩