Nouveaux matériaux hybrides organiques-inorganiques multifonctionnels. Impact de l'hybridation sur les propriétés mécaniques de polymères à mémoire de forme

Axe 2 - Matériaux multifonctionnels et environnement

Thèse de Marion Jannot

Travail de recherche commencé le 1er octobre 2015. La thèse est cofinancée avec un partenaire industriel : PSA Peugeot Citroën.

Soutenance le jeudi 13 décembre 2018 à 14h
Lieu : Campus Pierre et Marie Curie, Sorbonne Université – Paris 5^e
(amphi à définir)

Laboratoires co-porteurs

• Laboratoire de Chimie de la Matière Condensée de Paris LCMCP
  Porteuse de projet : Laurence Rozes
• PSA Peugeot Citroën -­‐ Direction Scientifique et Technologies Futures
  Co-encadrant : Fabien Szmytka, Stéphane Delalande

Key words

Polymers, hybrid materials, shape memory properties

Présentation du projet

Shape memory materials have the ability to change their shape and recover their original shape upon application of an external stimulus. One possible way to trigger shape memory effect is to change and increase system temperature. These material are called thermos-responsive. To obtain this ability, two conditions are required. First, switch domain as reversible thermal transition is necessary for temporary shape fixation and partial recovery. This shape memory transition allow to enable chain mobility to fix temporary shape and inversely recovery permanent shape. Then, a cross-linking network determine the permanent shape to prevent chain slipping.

In this study, reversible thermal transition is determined by melting temperature of crystalline phase of poly(ethylene-co-vinyl acetate). This polymer is cross-linked by an inorganic component as transition metal via transesterification reaction to form dynamic covalent bond. We obtain shape memory hybrid material whose shape can be changed via dynamic covalent (transesterification) reaction. Moreover, the use of an organic-inorganic hybrid material enable to obtain custom-made material, specifically by tuning nanostructuration and nature of the hybrid interface. Indeed, hybridation allow to enhance mechanical properties and bring new properties such as thermally induced healing properties and reprocessability.

Interventions orales

• 21/08/2018
  256th ACS National Meeting in Boston - Vitrimers & Other Covalent Adaptable Networks, Boston
  Thermadapt shape memory hybrid materials with healing properties
  M. Jannot, F. Szmytka, S. Delalande, L. Rozes 

Présentations posters

• 20/06/2016
  Journée du Labex Matisse, Paris
  New multifunctional hybrid organic-inorganic materials. Impact of hybridation on mechanical properties of shape memory polymers
  M. Jannot, F. Szmytka, S. Delalande, L. Rozes
• 05/10/2016
  Journée OpenLab, Paris
  Nouveaux matériaux hybrides organiques-inorganiques multifonctionnels
  M. Jannot, A. Tonnelier, L. Nicole, S. Delalande, L. Rozes 
• 20/10/2016
  Journée des doctorants PSA, Vélizy-Villacoublay
  Nouveaux matériaux hybrides organiques-inorganiques multifonctionnels. Impact de l’hybridation sur les propriétés mécaniques de polymères à mémoire de forme  
• 04/07/2017
  Journée du Labex Matisse, Paris
  New multifunctional hybrid organic-inorganic materials. Impact of hybridation on mechanical properties of shape memory polymers
  M. Jannot, F. Szmytka, S. Delalande, L. Rozes 
• 23/11/2017
  Journée des doctorants PSA, Vélizy-Villacoublay
  New multifunctional hybrid organic-inorganic materials. Impact of hybridation on mechanical properties of shape memory polymers
  M. Jannot, F. Szmytka, S. Delalande, L. Rozes