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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Zhang, Yan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2023Recyclable 3D‐Printed Aqueous Lithium‐Ion Batterycitations
- 2023Controlling Charge Transport in 2D Conductive MOFs─The Role of Nitrogen-Rich Ligands and Chemical Functionality.citations
- 2022Interface Stability between Na3Zr2Si2PO12 Solid Electrolyte and Sodium Metal Anode for Quasi-Solid-State Sodium Batterycitations
- 2022Ultrasonic Transducers made from Freeze-Cast Porous Piezoceramicscitations
- 2021Piezoelectric tunability and topological insulator transition in a GaN/InN/GaN quantum-well devicecitations
- 2021Patch test–relevant concentrations of metal salts cause localized cytotoxicity, including apoptosis, in skin ex vivocitations
- 2021Correlation between dielectric, mechanical properties and electromechanical performance of functionalized graphene / polyurethane nanocompositescitations
- 2020Self-healing dielectric elastomers for damage-Tolerant actuation and energy harvestingcitations
- 2020Harnessing Plasticity in an Amine-Borane as a Piezoelectric and Pyroelectric Flexible Filmcitations
- 2019Piezoelectric performance of PZT-based materials with aligned porosity::experiment and modellingcitations
- 2019Ice-templated poly(vinylidene fluoride) ferroelectretscitations
- 2019Piezoelectric performance of PZT-based materials with aligned porosity:citations
- 20181-3-Type Composites Based on Ferroelectrics:Electromechanical Coupling, Figures of Merit, and Piezotechnical Energy-Harvesting Applicationscitations
- 2018Understanding the effect of porosity on the polarisation-field response of ferroelectric materialscitations
- 20181-3-Type Composites Based on Ferroelectricscitations
- 2018Ice-templated poly(vinylidene fluoride) ferroelectretscitations
- 2016Tannic Acid and Cholesterol-Dopamine as Building Blocks in Composite Coatings for Substrate-Mediated Drug Deliverycitations
- 2016Tannic Acid and Cholesterol-Dopamine as Building Blocks in Composite Coatings for Substrate-Mediated Drug Deliverycitations
Places of action
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article
Ice-templated poly(vinylidene fluoride) ferroelectrets
Abstract
Ferroelectrets are piezoelectrically-active polymer foams that can convert externally applied loads into electric charge for sensor or energy harvesting applications. Existing processing routes used to create pores of the desired geometry and degree of alignment appropriate for ferroelectrets are based on complex mechanical stretching and chemical dissolution steps. In this work, we present the first demonstration of the use of freeze casting as a cost effective and environmentally friendly approach to produce polymeric ferroelectrets. The pore morphology, phase analysis, relative permittivity and direct piezoelectric charge coefficient (d33) of porous poly(vinylidene fluoride) (PVDF) based ferroelectrets with porosity volume fractions ranging from 24% to 78% were analysed. The long-range alignment of pore channels produced during directional freezing is shown to be beneficial in forming a highly polarised structure and high d33 ∼ 264 pC N−1 after breakdown of air within the pore channels during corona poling. This new approach opens a way to create tailored pore structures and voids in ferroelectret materials for transducer applications related to sensors and vibration energy harvesting.