Tungsten Disulfide Inorganic Nanotubes Functionalized by PTFE for Friction Application
| Autor: | Igor Lapsker, A. Moshkovich, Tzuriel Levin, Jean-Paul Lellouche, A. Laikhtman, Lev Rapoport, Yifat Harel |
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| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
agglomeration Polytetrafluoroethylene Materials science Science Mechanical Engineering Sonication friction Tungsten disulfide Nanoparticle Tribology Surfaces Coatings and Films chemistry.chemical_compound WS2 inorganic nanotubes chemistry Chemical engineering Transmission electron microscopy Surface modification PTFE surface functionalization |
| Zdroj: | Lubricants, Vol 9, Iss 78, p 78 (2021) Lubricants Volume 9 Issue 8 |
| ISSN: | 2075-4442 |
| DOI: | 10.3390/lubricants9080078 |
| Popis: | Inorganic nanotubes (INTs) and fullerene-like nanoparticles (NPs) of WS2/MoS2 penetrate and exfoliate at the contact interface and facilitate tribofilm formation. While the tribological properties are greatly improved by exfoliated NPs that shed easily, they may be diminished by agglomeration in oil. Therefore, surface functionalization is employed to improve dispersion in oil-based suspensions. Here, WS2 INTs were functionalized by polytetrafluoroethylene (PTFE) in a simple and cost-effective bath sonication method. WS2-INTs with two concentrations of added PTFE were characterized by scanning and transmission electron microscopy, micro-Raman spectroscopy, and thermogravimetric analysis. Superior distribution of WS2 was observed before and during friction experiments. Chemical analysis showed a significantly greater amount of PTFE-coated INTs on rubbed surfaces, in accordance with the improved friction and wear properties. |
| Databáze: | OpenAIRE |
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