| People | Locations | Statistics |
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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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Saarimaki, Eetta
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2024Screening of suitable random copolymer polypropylene blends for HVDC cable insulationcitations
- 2023Molecular Layer Deposition of Polyurea on Silica Nanoparticles and Its Application in Dielectric Nanocompositescitations
- 2023Nano-scale nonwoven fabrics by electrospinning of polylactic acid
- 2021Dielectric performance of silica-filled nanocomposites based on miscible (PP/PP-HI) and immiscible (PP/EOC) polymer blendscitations
- 2021Dielectric Performance of Silica-Filled Nanocomposites Based on Miscible (PP/PP-HI) and Immiscible (PP/EOC) Polymer Blendscitations
- 2021Combining good dispersion with tailored charge trapping in nanodielectrics by hybrid functionalization of silicacitations
- 2021Deposition of Ureido and Methacrylate Functionalities onto Silica Nanoparticles and Its Effect on the Properties of Polypropylene-Based Nanodielectricscitations
- 2021PP/PP-HI/silica nanocomposites for HVDC cable insulationcitations
- 2020Silica surface modification with liquid rubbers & functional groups for new polyolefin-based dielectric nano-composites
- 2020Influence of polar and unpolar silica functionalization on the dielectric properties of PP/POE nanocompositescitations
- 2020Feasibility of Mini-Scale Injection Molding for Resource-Efficient Screening of PP-Based Cable Insulation Nanocompositescitations
- 2020Silica Functionalization: How Does it Affect Space Charge Accumulation in Nanodielectrics Under DC?
- 2020From Laboratory to Industrial Scalecitations
- 2019Silica-Polypropylene Nanocomposites for Film Capacitorscitations
- 2018Airborne Dust from Mechanically Recycled Cotton during Ring Spinning
- 2015Novel thermographic inspection method to detect the moisture in early stage of the water ingress and a procedure to remove the moisture from the composite structure
- 2013New high-quality mined nanomaterials mass produced for plastic and wood-plastic nanocomposites
- 2013PVC-wood composite
- 2009Development of thermographic inspection routine exploiting phase transition of water for moisture detection in aircraft structurescitations
- 2006Novel heat durable electromechanical filmcitations
- 2005Novel heat durable electromechanical filmscitations
- 2005Novel heat durable electromechanical film processingcitations
Places of action
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article
Novel heat durable electromechanical film
Abstract
New ferroelectrets were developed on the basis of foams from cyclo-olefin polymers and copolymers. The results obtained on the cyclo-olefin polymer foam demonstrate a significant improvement of the service temperature for ferroelectret transducer materials. Suitable compounding and preparation led to cyclo-olefin ferroelectrets with an electromechanical activity of around 15 pC/N, which is thermally stable at least up to 110degC. The properties in sensor and actuator applications are strongly dependent on the processing parameters related to film-making, sensor and actuator preparation, gas content and electric charging. The processing window for the film stretching was very narrow compared to the earlier developed polypropylene ferroelectrets. The film porosity, softness and thus the electromechanical activity are adjusted by gas-diffusion expansion. The activity of the electromechanically operating sensors and actuators was increased by stacking several layers of cellular cyclo-olefin film. For applications such as flat loudspeakers, the foamed films are tuned by tensioning them on a support frame. Correct tensioning was essential also for reducing the distortion levels.