Titre : Using Dynamic Chemistry as a Route to New Stimuli-Responsive Materials
Endroit : Pavillon J.A.-Bombardier, salle 1035 à 11 h
Hôte : William Skene
Cette conférence sera prononcée par le professeur Stuart Rowan du Département d'ingénierie et des sciences macromoléculaires de la Case Western Reserve University. Elle est commanditée par le Centre de recherche sur les materiaux auto-assemblés (CRMAA) et sera donnée en anglais.
Résumé : The dynamic bond can be defined as any class of bond that selectively undergoes reversible breaking and reformation, usually under equilibrium conditions. The incorporation of dynamic bonds (which can be either covalent or non-covalent) allows access to structurally dynamic polymers. Such polymers can exhibit macroscopic responses upon exposure to an environmental stimulus, on account of a rearrangement of the polymeric architecture. In such systems the nature of the dynamic bond not only dictates which stimulus the material will be responsive to but also plays a role in the response itself. Thus such a design concept represents a molecular level approach to the development of new stimuli-responsive materials. We have been interested in the potential of such systems to access new material platforms and have developed a range of new mechanically stable, supramolecular structurally dynamic polymer films that change their properties in response to a given stimulus, such as temperature, light or specific chemicals. Such supramolecular materials have been targeted toward applications that include healable plastics, responsive liquid crystalline polymers, chemical sensors, thermally responsive hydrogels, shape memory materials and mechanically dynamic biomedical implants. In this presentation we will focus on two classes of stimuli-responsive materials (1) photo-healable/shape-memory materials and (2) mechanically dynamic cortical implants.
