Improving Wear Resistance of Teflon
University of Arkansas researchers will receive a $450,000 grant from the National Science Foundation to further their study of a novel approach that significantly improves wear resistance of polytetrafluoroethylene coatings. Polytetrafluoroethylene (PTFE) is better known by its trademarked brand name: Teflon.
“Obviously, PTFE is a great material with many wonderful applications,” said Min Zou, professor of mechanical engineering. “But its coatings are easily worn because of their poor adhesion to substrates, and this severely limits its applications.”
The funding will support the work of Zou and Jingyi Chen, assistant professor of chemistry in the J. William Fulbright College of Arts and Sciences. Zou and Chen are investigating a novel approach to improve wear resistance of PTFE coatings by incorporating polydopamine as an adhesive under layer. As part of the same project, to increase adhesiveness, the researchers are also studying the integration of polydopamine-coated nanostructures in both the under layer material and the PTFE coating.
The new approach will allow thin, wear-resistant PTFE coatings to be deposited on any substrate material without changing the underlining surface topography. Achieving this could promote the execution of a wide range of properties – such as self-cleaning, anti-fogging, anti-icing, anti-corrosion and others – that rely on surface topography and chemistry for proper function.
PTFE is used not only in cooking tools, but also has various applications in the energy, aerospace, automotive, oil and natural gas, health care and biomedical industries.
Zou, who holds the Twenty-First Century Professorship in mechanical engineering, serves as director of the statewide Center for Advanced Surface Engineering, which was created last summer with a $20 million NSF/EPSCoR (Experimental Program to Stimulate Competitive Research) grant and an additional $4 million matching funds from the state. The center promotes statewide scientific progress by establishing partnerships with government, higher education and industry.
In a different research project, Chen and a colleague at the University of Arkansas for Medical Sciences recently published their findings on an alternative therapeutic approach that uses polydopamine coated gold nanostructures to deliver both heat and the drug to successfully combating antibiotic-resistant infections.