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Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers
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 respon...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8587960/ https://www.ncbi.nlm.nih.gov/pubmed/34771310 http://dx.doi.org/10.3390/polym13213751 |
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author | von Seggern, Heinz Zhukov, Sergey Dali, Omar Ben Hartmann, Claas Sessler, Gerhard M. Kupnik, Mario |
author_facet | von Seggern, Heinz Zhukov, Sergey Dali, Omar Ben Hartmann, Claas Sessler, Gerhard M. Kupnik, Mario |
author_sort | von Seggern, Heinz |
collection | PubMed |
description | 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)) [Formula: see text] coefficients were achieved. The isothermal stability of the [Formula: see text] 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 [Formula: see text] 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 [Formula: see text] coefficients of the suggested structure indicating a potential for further optimization. |
format | Online Article Text |
id | pubmed-8587960 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-85879602021-11-13 Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers von Seggern, Heinz Zhukov, Sergey Dali, Omar Ben Hartmann, Claas Sessler, Gerhard M. Kupnik, Mario Polymers (Basel) Article 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)) [Formula: see text] coefficients were achieved. The isothermal stability of the [Formula: see text] 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 [Formula: see text] 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 [Formula: see text] coefficients of the suggested structure indicating a potential for further optimization. MDPI 2021-10-29 /pmc/articles/PMC8587960/ /pubmed/34771310 http://dx.doi.org/10.3390/polym13213751 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article von Seggern, Heinz Zhukov, Sergey Dali, Omar Ben Hartmann, Claas Sessler, Gerhard M. Kupnik, Mario Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers |
title | Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers |
title_full | Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers |
title_fullStr | Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers |
title_full_unstemmed | Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers |
title_short | Highly Efficient Piezoelectrets through Ultra-Soft Elastomeric Spacers |
title_sort | highly efficient piezoelectrets through ultra-soft elastomeric spacers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8587960/ https://www.ncbi.nlm.nih.gov/pubmed/34771310 http://dx.doi.org/10.3390/polym13213751 |
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