Dresden 2009 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
PV: Plenarvorträge
PV IX
PV IX: Plenarvortrag
Donnerstag, 26. März 2009, 08:30–09:15, HSZ 01
Self-healing rubbers and glasses from supramolecular assembly — •Ludwik Leibler — Matière Molle et Chimie, CNRS – ESPCI ParisTech (UMR 7167), 10 rue Vauquelin, 75005 Paris, France
Supramolecular chemistry can help to solve the dilemma of making easily processable materials with good polymer-like properties and thereby contribute to alleviate some important social issues of 21st century. It can also allow synthesis of materials with unique hitherto unimaginable properties. My lecture will try to answer the question of how small molecules can exhibit polymer-like properties thanks to direction interactions. I will also show how direction interactions say multiple parallel hydrogen bonds and dynamic correlation effects can be harnessed to lead to self-healing supramolecular rubbers and glasses. Such materials when broken or cut can be simply mended and basically recover their initial mechanical properties by bringing together fractured surfaces to self-heal at room temperature. The process of breaking and healing can be repeated many times and healing does not require heating or using chemical reactions. Interestingly, the discovery of self-healing rubbers could shed new light on physics of association.
The discovery of self-healing rubbers opens challenging questions about unusual glassy-like dynamics, physics of fracture and adhesion but also interestingly it could shed new light on physics of simple liquids such as water or water/alcohol mixtures.