Seggern, Heinz von ; Zhukov, Sergey ; Ben Dali, Omar ; Hartmann, Claas ; Sessler, Gerhard M. ; Kupnik, Mario (2022)
Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers.
In: Polymers, 2022, 13 (21)
doi: 10.26083/tuprints-00019969
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Item Type: | Article |
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Type of entry: | Secondary publication |
Title: | Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers |
Language: | English |
Date: | 2 May 2022 |
Place of Publication: | Darmstadt |
Year of primary publication: | 2022 |
Publisher: | MDPI |
Journal or Publication Title: | Polymers |
Volume of the journal: | 13 |
Issue Number: | 21 |
Collation: | 14 Seiten |
DOI: | 10.26083/tuprints-00019969 |
Corresponding Links: | |
Origin: | Secondary publication DeepGreen |
Abstract: | Piezoelectrets are artificial ferroelectrics that are produced from non-polar air-filled porous polymers by symmetry breaking through high-voltage-induced Paschen breakdown in air. A new strategy for three-layer polymer sandwiches is introduced by separating the electrical from the mechanical response. A 3D-printed grid of periodically spaced thermoplastic polyurethane (TPU) spacers and air channels was sandwiched between two thin fluoroethylene propylene (FEP) films. After corona charging, the air-filled sections acted as electroactive elements, while the ultra-soft TPU sections determined the mechanical stiffness. Due to the ultra-soft TPU sections, very high quasi-static (22,000 pC N⁻¹) and dynamic (7500 pC N⁻¹) d₃₃ coefficients were achieved. The isothermal stability of the d₃₃ coefficients showed a strong dependence on poling temperature. Furthermore, the thermally stimulated discharge currents revealed well-known instability of positive charge carriers in FEP, thereby offering the possibility of stabilization by high-temperature poling. The dependences of the dynamic d₃₃ coefficient on seismic mass and acceleration showed high coefficients, even at accelerations approaching that of gravity. An advanced analytical model rationalizes the magnitude of the obtained quasi-static d₃₃ coefficients of the suggested structure indicating a potential for further optimization. |
Uncontrolled Keywords: | ferroelectret, piezoelectret, fluoropolymer, elastomer, FEP, TPU |
Status: | Publisher's Version |
URN: | urn:nbn:de:tuda-tuprints-199691 |
Classification DDC: | 500 Science and mathematics > 540 Chemistry 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering |
Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Electronic Materials 18 Department of Electrical Engineering and Information Technology > Measurement and Sensor Technology |
Date Deposited: | 02 May 2022 11:25 |
Last Modified: | 14 Nov 2023 19:04 |
SWORD Depositor: | Deep Green |
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/19969 |
PPN: | 505649217 |
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