Tribological Interaction of Plasma-Functionalized Polytetrafluoroethylene Nanoparticles with ZDDP and Ionic Liquids
| Autor: | Richard B. Timmons, Pranesh B. Aswath, Jens Johansson, Braham Prakash, Vinay Sharma |
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| Rok vydání: | 2018 |
| Předmět: |
Polytetrafluoroethylene
Materials science Silicon Mechanical Engineering chemistry.chemical_element Nanoparticle 02 engineering and technology Surfaces and Interfaces Zinc 021001 nanoscience & nanotechnology Methacrylate Surfaces Coatings and Films chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Chemical engineering X-ray photoelectron spectroscopy Mechanics of Materials Ionic liquid Phosphonium 0210 nano-technology |
| Zdroj: | Tribology Letters. 66 |
| ISSN: | 1573-2711 1023-8883 |
| Popis: | Polytetrafluoroethylene (PTFE) nanoparticles were coated with consecutive plasma deposited siliceous and methacrylate coatings. Secondary zinc dialkyldithiophosphate (ZDDP), phosphonium cation and phosphate anion ionic liquid (IL), and IL with phosphonium cation and dithiophosphate anion were mixed with the functionalized nanoparticles. Tribological studies were carried out for seven separate formulations including base oil, oils with only additives, and oils with additives and functionalized PTFE particles. Results indicate strong synergistic interactions of ZDDP and ILs with functionalized nanoparticles providing enhanced friction and wear performance. Chemical analysis of the tribofilms using X-ray photoelectron spectroscopy and X-ray absorption near edge structure spectroscopy indicates functionalized PTFE nanoparticles interact synergistically with ZDDP and ILs to form silicon- and fluorine-doped tribofilms resulting in superior tribological performance. |
| Databáze: | OpenAIRE |
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