Abstract
The piezoelectric performance of polyvinylidene fluoride (PVDF) is shown to double through the controlled incorporation of carbon nanomaterial. Specifically, PVDF composites containing carbon fullerenes (C60) and single-walled carbon nanotubes (SWNT) are fabricated over a range of compositions and optimized for their Young's modulus, dielectric constant, and d31 piezoelectric coefficient. Thermally stimulated current measurements show a large increase in internal charge and polarization in the composites over pure PVDF. The electromechanical coupling coefficients (k 31) at optimal loading levels are found to be 1.84 and 2 times greater than pure PVDF for the PVDF-C60 and PVDF-SWNT composites, respectively. Such property-enhanced nanocomposites could have significant benefit to electromechanical systems employed for structural sensing, energy scavenging, sonar, and biomedical imaging.
| Original language | English (US) |
|---|---|
| Article number | 124104 |
| Journal | Journal of Applied Physics |
| Volume | 112 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 15 2012 |
| Externally published | Yes |
Bibliographical note
Funding Information:Tetramer Technologies acknowledges support from the National Science Foundation SBRIR Phase II Award (Grant No. 0923988). We also thank the NSF I/UCRC Center for Energy Harvesting Materials & Systems (Grant No. 37155043), the Robert A. Welch Foundation (Grant AT-0041) and the National Science Foundation MWN-GOALI program.
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