Abstract
Polytetrafluoroethylene (PTFE) was implanted by titanium ions in a MEVVA (MEtal Vapour Vacuum Arc) implanter. The influence of implantation parameters was studied by varying the ion dose over a wide range. The samples were implanted with 40 keV Ti ions with doses from 5 × 1015 to 5 × 1017 Ti/cm2, and investigated by ESCA, XRD, SEM, and wettability. All the as-implanted PTFE samples were aged in air for one year. After aging the surface-restructuring behavior was observed on the samples implanted with doses of 5 × 1015, 1 × 1016, and 5 × 1016 Ti/cm2. The water contact angle of all the aged samples decreased to a certain extent except for the sample implanted with a dose of 5 × 1017 Ti/cm2. The experimental results suggest that the surface chemical bond, morphology, wettability, and aging stability of as-implanted PTFE samples exhibited fairly strong dependence on the ion dose.
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