TY - JOUR
T1 - Tungsten disulfide inorganic nanotubes functionalized by ptfe for friction application
AU - Levin, Tzuriel
AU - Harel, Yifat
AU - Lellouche, Jean Paul
AU - Moshkovich, Alexey
AU - Lapsker, Igor
AU - Laikhtman, Alex
AU - Rapoport, Lev
N1 - Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/8
Y1 - 2021/8
N2 - 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.
AB - 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.
KW - Agglomeration
KW - Friction
KW - PTFE
KW - Surface functionalization
KW - WS2 inorganic nanotubes
UR - http://www.scopus.com/inward/record.url?scp=85112514194&partnerID=8YFLogxK
U2 - 10.3390/lubricants9080078
DO - 10.3390/lubricants9080078
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AN - SCOPUS:85112514194
SN - 2075-4442
VL - 9
JO - Lubricants
JF - Lubricants
IS - 8
M1 - 78
ER -