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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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Correia, Daniela Maria Silva
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2023Humidity sensors based on magnetic ionic liquids blended in poly(vinylidene fluoride-co-hexafluoropropylene)citations
- 2023Multifunctional magnetoelectric sensing and bending actuator response of polymer-based hybrid materials with magnetic ionic liquidscitations
- 2023Solid polymer electrolytes based on a high dielectric polymer and ionic liquids for lithium batteriescitations
- 2023High performance ternary solid polymer electrolytes based on high dielectric poly(vinylidene fluoride) copolymers for solid state lithium-ion batteriescitations
- 2022Poly(lactic-co-glycolide) based biodegradable electrically and magnetically active microenvironments for tissue regeneration applicationscitations
- 2022Sustainable lithium-ion battery separators based on poly(3-Hydroxybutyrate-Co-Hydroxyvalerate) pristine and composite electrospun membranescitations
- 2022Poly(vinylidene fluoride-co-hexafluoropropylene) based tri-composites with zeolite and ionic liquid for electromechanical actuator and lithium-ion battery applicationscitations
- 2022Structural organization of ionic liquids embedded in fluorinated polymerscitations
- 2022Lithium-Ion battery solid electrolytes based on poly(vinylidene fluoride)-metal thiocyanate ionic liquid blendscitations
- 2022Ionic liquid-based electroactive materials: a novel approach for cardiac tissue engineering strategiescitations
- 2021Photocurable temperature activated humidity hybrid sensing materials for multifunctional coatingscitations
- 2021Enhanced ionic conductivity in poly(vinylidene fluoride) electrospun separator membranes blended with different ionic liquids for lithium ion batteriescitations
- 2021Thermal degradation behavior of ionic liquid/ fluorinated polymer composites: Effect of polymer type and ionic liquid anion and cationcitations
- 2020Polymer-based actuators: back to the futurecitations
- 2020Development of poly(l-Lactic Acid)-based bending actuatorscitations
- 2020Ionic liquid-polymer composites: a new platform for multifunctional applicationscitations
- 2020Lithium-ion battery separator membranes based on poly(L-lactic acid) biopolymercitations
- 2020Cellulose nanocrystal and water-soluble cellulose derivative based electromechanical bending actuatorscitations
- 2019Ionic-liquid-based printable materials for thermochromic and thermoresistive applicationscitations
- 2018Ionic and conformational mobility in poly(vinylidene fluoride)/ionic liquid blends: dielectric and electrical conductivity behaviorcitations
- 2018Low-field giant magneto-ionic response in polymer-based nanocompositescitations
- 2016Poly(vinylidene fluoride-hexafluoropropylene)/bayerite composites membranes for efficient arsenic water removalcitations
Places of action
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article
Humidity sensors based on magnetic ionic liquids blended in poly(vinylidene fluoride-co-hexafluoropropylene)
Abstract
Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) films incorporating 40 %wt. of different types of imidazolium ionic liquids (ILs) comprising different magnetic anions (tetrachloroferrate [FeCl4] - , tetrathiocyanatocobaltate [(SCN)4Co]2 - and tetrachlorocobaltate [CoCl4] - ) and imidazolium cation chain lengths 1-butyl-3-methyl imidazolium and 1-ethyl-3-methyl imidazolium, have been developed for humidity sensing applications. The influence of the different ILs into the morphology of the IL/PVDF-HFP composites has been evaluated, being observed a porous structure independently of the IL anion type and cation chain length. The inclusion of the ILs into PVDF-HFP induces the polymer crystallization into the electroactive β phase, being the increase more noticeable for PVDF-HFP/[Bmim][FeCl4], which reaches a β phase content of 85%. The degree of crystallinity slightly decreases with the incorporation of the filler, the incorporation of [Bmim]2[CoCl4], [Bmim]2[Co(SCN)4], and [Emim]2[Co(SCN)4] leading to a degree of crystallinity between 11 and 13%. A decrease in the thermal stability and the yield strength is observed in the hybrid samples with respect to neat PVDF-HFP, being this decrease more noticeable for the PVDF-HFP/[Bmim]2[Co(SCN)4] samples. Further, the highest magnetization has been obtained for the PVDF-HFP/[Bmim]2[Co(SCN)4] and PVDF-HFP/[Bmim][FeCl4] composites with similar filler concentrations. The suitability of the developed materials for humidity sensing has been evaluated by analysing the impedance variation with varying relative humidity from 30% to 85%. [Bmim]2[CoCl4]/PVDF-HFP displays the highest relative humidity (RH) sensing response of -2245 ±240 Ω/RH. Finally, the applicability of the developed hybrid IL/polymer composites has been demonstrated by the development of a real time breathing monitoring device. ; This work was supported by the Portuguese Foundation for Science and Technology (FCT) under strategic funding UIDB/04650/2020, UID/FIS/04650/2020, UID/QUI/0686/2020, ...