Comparative Study of Dynamic Behaviors of PFPE Zdol And Pfpe Ztetraol on A Diamond Like Carbon (Dlc) Substrate
PFPE (Perfluoropolyether)Zdol and PFPE Ztetraol lubricant films are simulated on a diamond like carbon (DLC) substrate using finitely extensible non-linear elastic (FENE) potential to understand the comparison of the dynamic behaviors of PFPE Zdol and PFPE Ztetraol.Varying the film thickness of the lubricant layers on a DLC substrate desorption rates of PFPE Zdol and PFPE Ztetraol are studied using Quartic potential. Increasing the number of functional beads in lubricant chains, the desorption rates are studied as a comparative manner. Why at low temperature functional beads in a lubricant chain deplete as the opposite way as it is expected, it is analyzed considering the point of desorption phenomenon.
Keywords - PFPE Zdol, PFPE Ztetraol, desorption, film thickness.