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117 results on '"Tencé‐Girault, Sylvie"'

4. Enhanced Pyroelectricity Over Extended Thermal Range in Flexible Polymer Thin Films.

Author

Xie, Kaili, Housseini, Joulia, Resende, Pedro M., Le Goupil, Florian, Isasa, Jean‐David, Tencé‐Girault, Sylvie, Fleury, Guillaume, Kellay, Hamid, and Hadziioannou, Georges

Subjects
POLYMER films, INFRARED detectors, CORE materials, CRYSTALLINE polymers, TRANSITION temperature, FERROELECTRIC polymers
Abstract

Polymer‐based pyroelectric thin films are crucial functional materials at the core of flexible and lightweight electronic devices, such as wearable monitoring sensors, energy harvesters, and infrared detectors. Nevertheless, the pyroelectric properties of the polymer films, such as poly(vinylidene fluoride‐trifluoroethylene) (P(VDF‐TrFE)), vanish when the surrounding temperature exceeds the ferroelectric‐to‐paraelectric transition temperature, and thus limits their pyroelectric performance to a low‐temperature range. Herein, to mitigate this issue by employing a new class of P(VDF‐TrFE) copolymer which has a low TrFE molar content is proposed. Fine‐tuning of the structure through thermal annealing in a vacuum environment significantly favors robust and highly polarized polymer films with a large area. Electric poling combined with an optimal annealing temperature (110–120 °C) gives highly ordered ferroelectric crystalline domains in the polymer films. Consequently, this remarkably broadens the temperature range (roughly up to 140 °C) for which the polymer film still presents high pyroelectric properties (pyroelectric coefficient 50 µC (m2K)−1). This study provides an alternative choice for pyroelectric polymer films with enhanced pyroelectricity in applications that require wider temperature ranges. [ABSTRACT FROM AUTHOR]

Published
2024
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19. Improvement of the self‐assembly of low χABA triblock copolymers with the addition of an ionic liquid.

Author

Guliyeva, Aynur, Pung, Hélène, Tencé‐Girault, Sylvie, Rébillat, Marc, Serghei, Anatoli, Gervais, Matthieu, Sollogoub, Cyrille, and Roland, Sébastien

Subjects
COPOLYMERS, MOLECULAR self-assembly, INDUSTRIAL chemistry, BLOCK copolymers, MOLECULAR weights, GLASS transitions, IONIC liquids
Abstract

Self‐assembly of high molecular weight commercially available low χ ABA triblock copolymers with ionic liquids (ILs) was observed after solvent casting without the implementation of an additional annealing step. Here, the addition of an IL to a triblock copolymer poly(methyl methacrylate‐b‐butyl acrylate‐b‐methyl methacrylate) (MAM) with an elastomeric central block and rigid end blocks is proposed to tune the self‐assembled morphology. Two different compositions of this copolymer with different initial microstructures (ill‐defined morphology without long‐range order and a lamellar morphology) were selected. The selectivity of the IL addition in one of the block phases was studied through the evolution of the glass transition of both blocks. The impact of the IL weight concentration on the morphology as well as the domain spacing is presented. Adding IL to the first copolymer detected a lyotropic disorder–order transition towards a gyroid morphology, observed even for a high molecular weight copolymer due to the low χ parameter, and for higher IL content a second transition to a lamellar morphology was observed. For the second copolymer, only an order–order transition (lamellae to cylinders) could be detected at high IL content. IL also enhanced the long‐range ordering of the MAM morphology obtained through solvent casting without additional annealing steps, compared with the same composition without IL. © 2022 Society of Industrial Chemistry. [ABSTRACT FROM AUTHOR]

Published
2023
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24. Enhanced Electrocaloric Response of Vinylidene Fluoride–Based Polymers via One‐Step Molecular Engineering

Author

Le Goupil, Florian, primary, Kallitsis, Konstantinos, additional, Tencé‐Girault, Sylvie, additional, Pouriamanesh, Naser, additional, Brochon, Cyril, additional, Cloutet, Eric, additional, Soulestin, Thibaut, additional, Domingue Dos Santos, Fabrice, additional, Stingelin, Natalie, additional, and Hadziioannou, Georges, additional

Published
2020
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26. Electrostrictive multilayer polymer actuator dimensioning and modelling for continuum snake like robot application

Author

Jacquemin, Quentin, Thuau, Damien, Monteiro, E., TENCÉ-GIRAULT, Sylvie, MECHBAL, Nazih, Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), and Arkema (Arkema)

Subjects
[PHYS]Physics [physics], [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

27. Crystal-Crystal transitions in poly(VDF-ter-TrFE-ter-CTFE): Influence of CTFE termonomers

Author

BARGAIN, François, THUAU, Damien, PANINE, Pierre, HADZIIOANNOU, Georges, DOMINGUES-DOS SANTOS, Fabrice, TENCÉ-GIRAULT, Sylvie, Laboratoire Matière Molle et Chimie (MMC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), European Synchrotron Radiation Facility (ESRF), Laboratoire de Chimie des Polymères Organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Piezotech SAS (Piezotech SAS), Piezotech SAS, Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), TENCE-GIRAULT, Sylvie, and THUAU, DAMIEN

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, Electro-active-polymers, [CHIM] Chemical Sciences, Polymères [Chimie], Fluorinated polymers, [CHIM]Chemical Sciences, Electroactive fluorinated copolymers, Crystalline structures, Cristallographie [Chimie], [CHIM.MATE]Chemical Sciences/Material chemistry, Electro-active polymers, ComputingMilieux_MISCELLANEOUS
Abstract

The increasing industrial interest for printed organic electronics these last years has led to the development of VDF-based electroactive polymers for numerous energy-related applications (sensors, actuators, capacitors) [1]. Depending on their CTFE content (from 0 to 10 mol %), poly (VDF-ter-TrFE-ter-CTFE), poly(vinylidene fluoride-ter-trifluoroethylene-ter-chlorotrifluoroethylene) copolymers exhibit ferroelectric (FE) or relaxor ferroelectric (RFE) properties at low temperature whereas they all present paraelectric (PE) behavior at high temperature. This thermal evolution of their electro-active properties is related to reversible crystal-crystal transitions. Using simultaneous SAXS-WAXS experiments along thermal cycles, we studied these structural transitions for three different copolymers with various amount of CTFE (0,  5 and  10 mol %). We identified two types of crystalline phase at low temperature with their proper crystal-crystal transition: the first one containing all-trans conformations (orthorhombic FE phase) presents a discontinuous transition towards the hexagonal PE phase, the second one which incorporates gauche disordered conformations (orthorhombic DFE (Defective Ferroelectric) or RFE) transits continuously towards the same hexagonal PE phase. The discontinuous FE to PE transition is the predominant transition observed in the copolymer without CTFE, it is the well-known Curie transition. The unique transition observed in the terpolymer with 10 mol % of CTFE is the continuous RFE to PE transition. For the intermediate composition, we observe the coexistence of these two simultaneous phase transitions, FE to PE and RFE to PE. These observations are well correlated with the ferroelectric and relaxor-ferroelectric behaviors of each terpolymer. All the conclusions and discussion of this study were recently published in Polymer [2]. At the epf2019 congress, we will focus on the SAXS-WAXS structural study.

Published
2019

28. Spin coating and micro-patterning optimization of composite thin films based on PVDF

Author

Nguyen, Anh Ngoc, Solard, Jeanne, Nong, Huyen Thi Thanh, Ben Osman, Chirine, Gómez Rodríguez, Andrés, Bockelée, Valérie, Tencé-Girault, Sylvie, Schoenstein, Frédéric, Simón-Sorbed, Maite, Carrillo Fernández, Anna Esther, Mercone, Silvana, Nguyen, Anh Ngoc, Solard, Jeanne, Nong, Huyen Thi Thanh, Ben Osman, Chirine, Gómez Rodríguez, Andrés, Bockelée, Valérie, Tencé-Girault, Sylvie, Schoenstein, Frédéric, Simón-Sorbed, Maite, Carrillo Fernández, Anna Esther, and Mercone, Silvana

Abstract

We optimize the elaboration of very thin film of poly(vinylidene fluoride) (PVDF) polymer presenting a well-controlled thickness, roughness, and nano-inclusions amount. We focused our effort on the spin coating elaboration technique which is easy to transfer to an industrial process. We show that it is possible to obtain continuous and smooth thin films with mean thicknesses of 90 nm by properly adjusting the concentration and the viscosity of the PVDF solution as well as the spin rate and the substrate temperature of the elaboration process. The electro-active phase content versus the magnetic and structural properties of the composite films is reported and fully discussed. Last but not least, micro-patterning optical lithography combined with plasma etching has been used to obtain well-defined one-dimensional micro-stripes as well as squared-rings, demonstrating the easy-to-transfer silicon technology to polymer-based devices.

Published
2020

32. Enhanced Electrocaloric Response of Vinylidene Fluoride–Based Polymers via One‐Step Molecular Engineering.

Author

Le Goupil, Florian, Kallitsis, Konstantinos, Tencé‐Girault, Sylvie, Pouriamanesh, Naser, Brochon, Cyril, Cloutet, Eric, Soulestin, Thibaut, Domingue Dos Santos, Fabrice, Stingelin, Natalie, and Hadziioannou, Georges

Subjects
DOUBLE bonds, ADIABATIC temperature, PYROELECTRICITY, POLYMERS, UNIT cell, ELECTRIC fields
Abstract

Electrocaloric refrigeration is one of the most promising environmentally‐friendly technologies to replace current cooling platforms—if a notable electrocaloric effect (ECE) is realized around room temperature where the highest need is. Here, a straight‐forward, one‐pot chemical modification of P(VDF‐ter‐TrFE‐ter‐CTFE) is reported through the controlled introduction of small fractions of double bonds within the backbone that, very uniquely, decreases the lamellar crystalline thickness while, simultaneously, enlarging the crystalline coherence along the a‐b plane. This increases the polarizability and polarization without affecting the degree of crystallinity or amending the crystal unit cell—undesirable effects observed with other approaches. Specifically, the permittivity increases by >35%, from 52 to 71 at 1 kHz, and ECE improves by >60% at moderate electric fields. At 40 °C, an adiabatic temperature change >2 K is realized at 60 MV m−1 (>5.5 K at 192 MV m−1), compared to ≈1.3 K for pristine P(VDF‐ter‐TrFE‐ter‐CTFE), highlighting the promise of a simple, versatile approach that allows direct film deposition without requiring any post‐treatment such as mechanical stretching or high‐temperature annealing for achieving the desired performance. [ABSTRACT FROM AUTHOR]

Published
2021
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36. Supramolecular thermoplastic with 0.5 Pa.s melt viscosity

Author

Réda, Agnaou, Capelot, Mathieu, Tencé-Girault, Sylvie, Tournilhac, François, Leibler, Ludwik, Laboratoire Matière Molle et Chimie (MMC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), and Boucher, Marie-France

Subjects
[CHIM] Chemical Sciences, [CHIM]Chemical Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2014

37. Order-Disorder Transition in Supramolecular Polymers

Author

Cortese, Jessalyn, Soulié-Ziakovic, Corinne, Cloitre, Michel, Tencé-Girault, Sylvie, Leibler, Ludwik, Boucher, Marie-France, Laboratoire Matière Molle et Chimie (MMC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2011

38. The influence of blend morphology (co-continuous or sub-micrometer droplets dispersions) on the nucleation and crystallization kinetics of double crystalline polyethylene/polyamide blends prepared by reactive extrusion

Author

Cordova, Miguel, Müller, Alejandro, Lorenzo, Arnaldo, Gani, Léa, Tencé-Girault, Sylvie, Leibler, Ludwik, Universidad Simon Bolivar (USB), Laboratoire Matière Molle et Chimie (MMC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2011

40. Co-continuous nanostructured blend by reactive blending: incorporation of high molecular weight polymers

Author

Gani, Léa, Tencé-Girault, Sylvie, Millequant, Michèle, Bizet, S., Leibler, Ludwik, Laboratoire Matière Molle et Chimie (MMC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Centre de recherche, développement, applications et technique de l'ouest (CERDATO), and Arkema (Arkema)

Subjects
ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2010
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41. Control of morphology by counterion in fluorinated polymer/polyelectrolyte blends for fuel cell membranes

Author

Norvez, Sophie, Gibon, Cécile, Tencé-Girault, Sylvie, Goldbach, James, Laboratoire Matière Molle et Chimie (MMC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Arkema (ARKEMA), and Arkema (Arkema)

Subjects
ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2009

42. Control of morphology and crystallization in polyelectrolyte/polymer blends

Author

Gibon, Cécile, Norvez, Sophie, Tencé-Girault, Sylvie, Goldbach, James, Laboratoire Matière Molle et Chimie (MMC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Arkema (ARKEMA), and Arkema (Arkema)

Subjects
ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2008

46. Macromol. Chem. Phys. 13/2011

Author

Córdova, Miguel E., primary, Lorenzo, Arnaldo T., additional, Müller, Alejandro J., additional, Gani, Léa, additional, Tencé-Girault, Sylvie, additional, and Leibler, Ludwik, additional

Published
2011
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47. Macromol. Chem. Phys. 7/2010

Author

Gani, Léa, primary, Tencé-Girault, Sylvie, additional, Milléquant, Michèle, additional, Bizet, Stéphane, additional, and Leibler, Ludwik, additional

Published
2010
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