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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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Cazacu, Maria
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023A Manganese(II) 3D Metal–Organic Framework with Siloxane-Spaced Dicarboxylic Ligand: Synthesis, Structure, and Propertiescitations
- 2023Fully carboxy-functionalized polyhedral silsesquioxanes as polar fillers to enhance the performance of dielectric silicone elastomerscitations
- 2022Soft silicone elastomers exhibiting large actuation strainscitations
- 2022Bentonite as an active natural filler for silicone leading to piezoelectric-like response materialcitations
- 2020Nanoscale Coordination Polymer of Dimanganese(II) as Infinite, Flexible Nanosheets with Photo‐Switchable Morphologycitations
- 2014Chemical modification of polysiloxanes with polar pendant groups by co-hydrosilylationcitations
- 2014Well-defined silicone–titania composites with good performances in actuation and energy harvestingcitations
- 2013Synthesis and characterization of silicones containing cyanopropyl groups and their use in dielectric elastomer actuatorscitations
- 2009Composite materials based on polydimethylsiloxane and <i>in situ</i> generated silica by using the sol–gel techniquecitations
- 2009Polysiloxane‐lignin compositescitations
Places of action
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article
Soft silicone elastomers exhibiting large actuation strains
Abstract
Poly(dimethyl-co-methylvinyl)siloxane-α,ω-diols with 1.5, 5.5, and 8.5 mol% vinyl group contents, respectively, are obtained via an environmental friendly synthesis and used as platforms for further chemical modification via a green process. This chemical modification consists of UV-activated thiol-ene addition of 3-chloro-1-propanethiol to the vinyl groups, as proven by NMR analysis. Cross-linking with tetraethyl orthosilicate (in excess) of such modified polymers leads to dielectric elastomers with higher values of dielectric permittivity than those of non-chemically modified vinyl copolymers cross-linked under similar conditions. In addition, at high chloropropyl content, there is a significant decrease in Young's modulus, attributed to the plasticizing effect of the alkyl segment of the attached chloropropyl, and only a slight increase in breakdown strength is observed. All these changes induced by the chloropropyl group act synergistically in favor of the electromechanical performances of the resulting elastomers that exhibit large out-of-plane actuation strains of 53% and 61% for polar contents of 5.5 and 8.5 mol%, respectively, at an applied electric field of 40 V/μm. These are to the best of our knowledge the largest out-of-plane actuation strains from silicone elastomers reported in literature.