Date of Graduation
Doctor of Philosophy in Microelectronics-Photonics (PhD)
Second Committee Member
Third Committee Member
Fourth Committee Member
Coatings, Friction, Nanoparticle, Polymer, PTFE, Wear
This dissertation presents an investigation into the effect of nanoparticle fillers and a polydopamine adhesive primer on the tribological performance of thin PTFE films. The principal objective of this investigation was to reduce wear in PTFE films, an issue which precludes the use of PTFE films in tribological applications requiring high durability. The friction and wear of the composite films were evaluated using a ball-on-flat configuration in linear reciprocating motion. It was found that the use of a polydopamine adhesive primer reduces the wear of PTFE films more than 600 times. X-ray photoelectron spectroscopy (XPS) results show that a tenacious layer of PTFE remains adhered to the polydopamine primer, which enables the durability of the polydopamine/PTFE film. Furthermore, the combination of a polydopamine primer, Cu nanoparticle fillers in the PTFE film, and optimal fabrication processes provided a collective effect that increased the wear life of PTFE films by more than 940 times. Because of the relatively low thickness of the film, it shows great potential for use in applications where durable, thin films are desirable.
Beckford, S. G. (2014). Wear Resistant Polydopamine/PTFE Nanoparticle Composite Coating for Dry Lubrication Applications. Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/2002