Leader : Guittard Frédéric
External Collaborators : Dow Chemicals, Seb-Tefal group, European Center - Ispra, Laboratoire Polymères Colloïdes et Interfaces (PCI), Centre de Transfert de Technologie du Mans
Financial supports : ANR Sustainable Chemistry, Industruies, Innovation (2010/2014) duration 48 months, Région PACA starting October 2010
Technological platforms : Surface treatment and analysis
The combination of a chemically hydrophobic and physically rough coating allow a surface to reach very high contact angles with water. When this contact angle is larger than 150 degrees, it is called superhydrophobic. We are interested in new fabrication techniques of these surfaces which also present superoleophobic characteristics. Thus for hexadecane, we have reached more than 150 degrees.
Our approach consists in generating a microstructure made of an ordered array of micropillars using photolithography and to make it conductive by a thin gold layer coating. The photolithography part is realized in the clean room of the lab. It has been built recently by the participant of the present project. It contains the basic elements (UV exposure, spin coater, vacuum bell-jar, hood...) to realize microfluidic devices and microstructured surfaces. Over the microstructured conductive surfaces, we add by electropolymerisation a hydrophobic and oleophobic coating, the conductive surface consists in one of the electrodes. The surface obtained by electropolymerisation is rough, but at nanoscopic scales, coming from a diffusion limited aggregation mechanism of the conductive monomers. This part is realized by the F. Guittard team from the CMOM, Nice. The strong interest of our method consists in the significant time reaction and product quantity reduction, compare to the treatment of a flat surface.
Fluides & Matériaux Complexes, Surfaces & Interfaces, Fluides Complexes, MIMIC
Dans la même rubrique :