Recherche sur les biopolymères

Abstrait

Stopping and Range of Ions in Matter data of polymeric materials simulating the process of ion implantation in plasma immersion

Péricles Lopes Sant’Ana

This work introduces the physico-chemical surface properties of three commercial polymers: white polyvinyl chloride (PVC), polyethylene terephthalate (PET) from two- liter bottles, and low-density polyethylene (LDPE) as results of plasma immersion ion implantation (PIII) using SF6 and N2 plasmas at low-pressure vacuum system. The experiments were conducted in the Technological Plasmas Laboratory (LapTec) between 2011 and 2013. For comparison, SRIM/TRIM calculations/Monte Carlo code were used to access the following output data: ion range and distribution (screening a Gaussian histogram); number of backscattered ions nB; and vacancies produced nVaccording to Kinchin–Pease formalism. In both approaches (experimental andsimulated), it was used as inputting data: the main ion implantation parameter: -1000 Vof high-voltage negative pulses in PIII experiments which are matched to 1 keV of inputenergy data in the virtual SRIM environment using F+ and N+ as projectiles ions, and rigid PVC, PET mylar and LDPE marlex as targets. The purpose was to link the surfaceproperties of the polymeric samples obtained in laboratory by PIII technique: Ɵ; Ɵ(t); R(z); T(λ) and B (by WVTR) with the output data about ion ranges and distribution, provided by the SRIM simulation.