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X-WR-CALNAME:Chimie ParisTech - PSL
X-ORIGINAL-URL:https://www.chimieparistech.psl.eu
X-WR-CALDESC:Évènements pour Chimie ParisTech - PSL
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211209T110000
DTEND;TZID=Europe/Paris:20211209T120000
DTSTAMP:20211209T183826Z
CREATED:20211209T182740Z
LAST-MODIFIED:20211209T183826Z
UID:22690-1639047600-1639051200@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Recent developments and future challenges in vitrimer materials\nWhere: amphi Holweck \nDamien Montarnal\, Laboratoire Catalyse\, Polymérisation\, Procédés et Matériaux (UMR 5128)\, Lyon\n\nAbstract: Vitrimers aim at combining the benefits of thermoplastics and thermosets by incorporating in polymer networks dynamic covalent crosslinks governed by associative\, exchangeable reactions in chemical equilibrium.[1] At high temperatures or in the presence of catalysts\, chemical equilibria are fast enough to enable large scale reorganisation and stress relaxation of the network\, and as a consequence plastic deformation\, reprocessing and welding of the sample. In contrast with dissociative reversible networks that depolymerize at high temperatures\, associative vitrimer networks remain crosslinked at all times and display a high melt elasticity and therefore a large adaptability to mould-free (re)processing techniques. \nThis very versatile concept has been successfully applied to different polymer systems by taking advantage of a variety of equilibrated reactions\, either textbook or purposely developed.[2\,3] Most vitrimers share however a common technological bottleneck: no satisfactory compromise has yet been found between fast (re)processing at high temperatures and very slow dynamics at service temperature guarantying creep resistance of the materials. We will discuss in this scope the main features of dissociative and associative dynamic networks\, and their respective linear rheological behaviors.[3] We will address some of our recent efforts to go beyond the weak temperature dependence of the exchange dynamics\, presenting in particular “deactivable silicone vitrimers”. \nAdditionally to these developments on dynamic networks\, we will present the synthesis of new functional porous materials that enable transportable Dynamic Nuclear Polarisation\,[4] a recent NMR technique with revolutionary perspectives in both in-vitro and in-vivo detection of chemical transformations (reactional intermediates\, metabonomics\,…). \nREFERENCES \n1.       Montarnal\, D.; Capelot\, M.; Tournilhac\, F.; Leibler\, L. Science 2011\, (334)\, 965–968.\n2.       Denissen\, W.; Winne\, J. M.; Du Prez\, F. E. Chemical Science 2016\, (7)\, 30–38.\n3.       Jourdain\, A.; Asbai\, R.; Anaya\, O.; Chehimi\, M.; Drockenmuller\, E; Montarnal\, D. Macromolecules 2020\, (53)\, 1884–1900\n4.       El Darai\, T. et al\, Nature Comm. 2021\, (12)\, 4695.\n\n\nThe list of upcoming SIMM seminars:\nhttps://www.simm.espci.fr/-Seminaires-.html
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-63/
LOCATION:ESPCI Paris\, 10 Rue Vauquelin\, Paris\, 75005\, France
CATEGORIES:Séminaire
ATTACH;FMTTYPE=image/png:https://www.chimieparistech.psl.eu/wp-content/uploads/2020/06/chimie1.png
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211209T140000
DTEND;TZID=Europe/Paris:20211209T150000
DTSTAMP:20211126T114936Z
CREATED:20211126T114531Z
LAST-MODIFIED:20211126T114936Z
UID:22631-1639058400-1639062000@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Anodic Oxidations of Carboxylic Acids in Batch and Flow:\nNew Tricks for an Old Reaction\nDr Kevin Lam\, The University of Greenwich School of Science\, Chatham Maritime\, ME4 4TB\, UK \nWhere ? Amphi Friedel (Chimie ParisTech – PSL)  \n \nSynthetic organic electrochemistry takes its roots from Faraday and Kolbe’s classic works on electrolysis of aliphatic carboxylic acids. Although a plethora of transformations have been developed ever since and many of them were successfully used in several industrial processes\, the potential of preparative organic electrochemistry remains underestimated. \n  \nHowever\, the growing impetus to look for greener and more costeffective alternatives to traditional synthetic methodologies recently led to the development of novel electrosynthetic methods. \nWe will disclose new\, safe\, green\, affordable and efficient ways to generate highly reactive organic intermediates\, such as isocyanates\, orthoesters\, and oxycarbonyl radicals during this presentation. We will also discuss their scale up by using flow electrosynthesis.
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-61/
LOCATION:Chimie ParisTech – PSL\, 11\, rue Pierre et Marie Curie\, Paris\, 75005\, France
CATEGORIES:Séminaire
ATTACH;FMTTYPE=image/png:https://www.chimieparistech.psl.eu/wp-content/uploads/2020/06/chimie1.png
ORGANIZER;CN="Kevin Lam":MAILTO:k.lam@greenwich.ac.uk
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211209T140000
DTEND;TZID=Europe/Paris:20211209T150000
DTSTAMP:20211209T184535Z
CREATED:20211209T184459Z
LAST-MODIFIED:20211209T184535Z
UID:22697-1639058400-1639062000@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Scanning Tunneling Microscopy at high magnetic fields\n\n\n\n\nBeilun WU\, Laboratorio de Bajas Temperaturas y Altos Campos Magnéticos\, Departamento de Física de la Materia Condensada\, Instituto Nicolás Cabrera and Condensed Matter Physics Center (IFIMAC)\, Universidad Autónoma de Madrid\, E-28049 Madrid\, Spain\n \nAbstract: In this talk\, I will discuss recent advances in our scanning tunneling microscopy and spectroscopy experiment at magnetic fields of 22 T. First\, I will present improvements in the instrumentation that have allowed to build compact microscopes with which we have been able to make measurements up to 20 T. I will then discuss results obtained in iron pnictide superconductors. I will focus on the recent family of CaKFe4As4 materials\, which have very high critical temperatures (up to 38 K) and present isotropic two gap superconductivity. I will show measurements of the properties of the vortex lattice and of the band structure\, the latter obtained using quasiparticle interference. I will further present recent results on the vortex phase and the band structure of other iron pnictide superconductors.\n\n\n\n\n \nWHERE ?\nThe seminar will be held on a hybrid format. You can attend the seminar in person at ESPCI (Room Charpak) or you can follow it on Zoom Education.\nIn person: Room Charpak\, Entrance Building\, ground floor (a COVID certificate is requested at the entrance of ESPCI)\n\n\n\n\n\n\n\nand\nZoom link: https://espci.zoom.us/j/83934141072?pwd=SkJqL01WMHc3YTdFaW9ZeXFlZzYzZz09\nID: 839 3414 1072\nPassword: JJThomson\nContact/to subscribe or unsubscribe: seminaires-lpem@espci.fr
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-65/
LOCATION:ESPCI Paris\, 10 Rue Vauquelin\, Paris\, 75005\, France
CATEGORIES:Séminaire
ATTACH;FMTTYPE=image/png:https://www.chimieparistech.psl.eu/wp-content/uploads/2020/06/chimie1.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211209T140000
DTEND;TZID=Europe/Paris:20211209T150000
DTSTAMP:20211209T185738Z
CREATED:20211209T185647Z
LAST-MODIFIED:20211209T185738Z
UID:22701-1639058400-1639062000@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Hyaluronic Acid Based Hydrogels for Tissue Engineering and Regenerative Medicine\n\n\n\n\n\n\nProfesseur David Eglin\, Département Biomatériaux au Centre Ingénierie Santé\, Ecole des Mines de Saint-Etienne et INSERM SAINBIOSE \nWhere ? Ecole des Mines\, amphi L.109 \n\n\nAbstract : Hyaluronic acid (HA) Hydrogels have shown great potential as biomaterials for tissue repair strategies. This lecture aims to present the optimization and the biophysical properties of hyaluronan-based hydrogels and investigate their capabilities for stem cell engineering and tissue repair. In addition to advancing our understanding of crosslinking strategies\, investigation on how hyaluronan networks influence mesenchymal stem cells will be shown. Recent advance in biofabrication processes and hyaluronan bioinks will be reported in the context of cell-instructive biomaterials.
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-66/
LOCATION:Mines ParisTech – PSL\, 60 boulevard Saint Michel\, Paris\, Ile de France\, 75272\, France
CATEGORIES:Séminaire
ATTACH;FMTTYPE=image/png:https://www.chimieparistech.psl.eu/wp-content/uploads/2020/06/chimie1.png
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