Enhancing the piezoelectric performance of PVDF-TrFE thin films using zinc oxide nanoparticles

John S. Dodds; Frederick N. Meyers; Kenneth J. Loh

doi:10.1117/12.915072

3 April 2012 Enhancing the piezoelectric performance of PVDF-TrFE thin films using zinc oxide nanoparticles

John S. Dodds, Frederick N. Meyers, Kenneth J. Loh

Proceedings Volume 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012; 834515 (2012) https://doi.org/10.1117/12.915072
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

Structural health monitoring (SHM) is crucial for detecting sudden and progressive damage and for preventing catastrophic structural failure. Piezoelectric materials have been widely adopted for their use as sensors and as actuators. Piezoceramics (such as lead zirconate titanate) offer high piezoelectricity but are mechanically brittle. Poly(vinylidene fluoride) (PVDF) piezopolymers are conformable to complex structural surfaces but exhibit lower piezoelectricity. So as to achieve a combination of these desirable properties, piezoelectric zinc oxide (ZnO) nanomaterials are proposed for embedment in flexible polymer matrices during fabrication to yield high-performance piezoelectric nanocomposites. The main objective of this research is to characterize the piezoelectricity of nanocomposites formed by embedding ZnO nanoparticles in a PVDF-trifluoroethylene (TrFE) matrix. Film fabrication is performed by dispersing ZnO into a PVDFTrFE solution and then by spin coating the solution onto a rigid substrate. A high electric field is applied to each of the films for poling, and the films' remnant polarization is quantified by measuring their ferroelectric response using a Sawyer-Tower circuit. Graphs of electric field compared to electric displacement can be obtained for determining the films' piezoelectricity. Finally, validation of their sensing performance is achieved by hammer impact testing.

Citation Download Citation

John S. Dodds, Frederick N. Meyers, and Kenneth J. Loh "Enhancing the piezoelectric performance of PVDF-TrFE thin films using zinc oxide nanoparticles", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 834515 (3 April 2012); https://doi.org/10.1117/12.915072

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