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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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Owusu, Francis
KTH Royal Institute of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2023On-demand cross-linkable bottlebrush polymers for voltage-driven artificial musclescitations
- 2023Tailor-made Piezoelectric Elastomer Materials
- 2022Synthesis of polar polynorbornenes with high dielectric relaxation strength as candidate materials for dielectric applicationscitations
- 2022Stress effects on the impedance and ferroelectricity of PVDF- BiFeO 3 -MWCNT films using xanthan gum as dispersantcitations
- 2022High dielectric permittivity elastomers: synthesis, processability, and device manufacturingcitations
- 2022Stretchable high response piezoelectric elastomers based on polable polynorbornene fillers in a polydimethylsiloxane matrixcitations
Places of action
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thesis
Tailor-made Piezoelectric Elastomer Materials
Abstract
Recent advancements in miniature devices with higher computational capabilities and ultralow power consumption have accelerated the development of wearable sensors, actuators, and energy harvesters everywhere. The ultimate aim of such a technological revolution is to create an ecosystem of connected devices and transform physical objects into information sources. To achieve this, flexible materials with the versatility to be designed into complex architectures will be of relevance. Among the different energy transducing technologies, piezoelectricity has been earmarked as one of the leading routes due to its simple conversion mechanism, relatively high power density, and easy integration into various systems. However, conventional piezoelectric materials are limited in many applications due to their rigidity, high density, lack of machinability, inability to conform to delicate parts of systems and arbitrary interfaces. For this reason, there is an appreciable demand for developing new materials, which can sustain large mechanical deformation while retaining superb characteristics in their performance. This thesis systematically presents processing steps for preparing highly elastic piezoelectric materials solely from organic constituents. The approach combines selected organic reactions available in the synthesis toolbox and composite preparation technique. Novel polar amorphous polymers bearing different dipole moieties were synthesized, processed into nano-particles, and embedded as fillers in a polydimethylsiloxane (PDMS) matrix. To this end, we employed the power and versatility of ring-opening metathesis polymerization (ROMP) to synthesize polar amorphous polymers with high dielectric relaxation strength and glass transition temperature (Tg) significantly above room temperature. The collection of novel polymers was thoroughly characterized by NMR spectroscopy, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The dielectric behaviors were ...