Change of Wettability of PTFE Surface by Sputter Etching and Excimer Laser

Abstract

PTFE (Polytetrafluoroethylene) is one of the most chemically stable polymers. This means the small surface energy and the poor wettability. However, it is difficult to change the surface properties of PTFE. In this study, PTFE surface was treated by reactive sputter etching using H₂O gas and irradiation of KrF excimer laser in H₂O. The contact angles to water and ESCA spectra were measured. As a result the contact angles decreased and the surfaces of PTFE were changed chemically. Therefore, it is conclused that PTFE surfaces change chemically and to be wettable by irradiation of ions or UV strong light in H₂O gas or H₂O.