In this project, we will consider the PDMS surface modification by means of plasma activation and further chemical functionalization with bio-sourced molecules, extracted from natural sources. The ICMMO group has so far shown the feasibility to graft chemical species after plasma treatment on PDMS. The generation of the plasma in catheters will be then studied and intensified camera imaging (ICCD) will be used to monitor the spatio-temporal dynamics of the plasma. The LPGP group is equipped with a high resolution mass spectrometer (FT ICR system), which could be useful to have access to information on the action of the plasma on the tube surface, through the detection of organic species resulting from this action and coming out of the catheter in the gas flow. The goal is to identify and quantify those molecular species to get insight into the physico-chemical processes involved in the plasma-tube interaction. If we succeed in this task, we will have a better idea of the grafting mechanism of our bio-sourced molecules and we will then be better able to adapt the grafting, which will be done by filling the freshly plasma-treated catheters with the solutions of geraniol oxide (GO). The analysis of the grafting process will be conducted through analytical tools available at the ICMMO (ATR-FTIR, XPS, AFM, SEM, contact angle measurements, NMR,…) or through collaborations (ToF SIM, confocal laser-scanning microscopy,…).

Publié le 19/03/2023