Accueil > Séminaires > Précédents séminaires > Collapse, adhesion and friction of thermoresponsive polymer brushes probed with the surface forces apparatus

Collapse, adhesion and friction of thermoresponsive polymer brushes probed with the surface forces apparatus

Lionel Bureau Institut des Nanosciences de Paris

Temperature-sensitive polymers are widely used in designing smart surfaces or interfaces, which properties (wettability, adhesion, friction...) can be deeply altered by an external thermal stimulus. Grafting brushes of such polymers on the surface of biomedical devices represents a very promising way to achieve fine tuning of e.g. cell/substrate adhesion in tissue engineering. This requires the precise knowledge of how the brush properties are affected by its molecular structure.
In this talk, I will present very recent results about the temperature-dependent mechanical response, under compression and shear, of thermosensitive brushes immersed in water. This work has been performed on a custom-built Surface Forces Apparatus (SFA), and relies on a method for chemical modification of the mica substrates used in such experiments which greatly extends the range of systems that can be probed with the SFA.