Thermochemical Stability and Friction Properties of Soft Organosilica Networks for Solid Lubrication
AbstractIn view of their possible application as high temperature solid lubricants, the tribological and thermochemical properties of several organosilica networks were investigated over a range of temperatures between 25 and 580 °C. Organosilica networks, obtained from monomers with terminal and bridging organic groups, were synthesized by a sol-gel process. The influence of carbon content, crosslink density, rotational freedom of incorporated hydrocarbon groups, and network connectivity on the high temperature friction properties of the polymer was studied for condensed materials from silicon alkoxide precursors with terminating organic groups, i.e., methyltrimethoxysilane, propyltrimethoxysilane, diisopropyldimethoxysilane, cyclohexyltrimethoxysilane, phenyltrimethoxysilane and 4-biphenylyltriethoxysilane networks, as well as precursors with organic bridging groups between Si centers, i.e., 1,4-bis(triethoxysilyl)benzene and 4,4′-bis(triethoxysilyl)-1,1′-biphenyl. Pin-on-disc measurements were performed using all selected solid lubricants. It was found that materials obtained from phenyltrimethoxysilane and cyclohexyltrimethoxysilane precursors showed softening above 120 °C and performed best in terms of friction reduction, reaching friction coefficients as low as 0.01. This value is lower than that of graphite films (0.050 ± 0.005), a common bench mark for solid lubricants. View Full-Text
- Supplementary File 1:
PDF-Document (PDF, 628 KB)
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Gonzalez Rodriguez, P.; Dral, A.P.; van den Nieuwenhuijzen, K.J.H.; Lette, W.; Schipper, D.J.; ten Elshof, J.E. Thermochemical Stability and Friction Properties of Soft Organosilica Networks for Solid Lubrication. Materials 2018, 11, 180.
Gonzalez Rodriguez P, Dral AP, van den Nieuwenhuijzen KJH, Lette W, Schipper DJ, ten Elshof JE. Thermochemical Stability and Friction Properties of Soft Organosilica Networks for Solid Lubrication. Materials. 2018; 11(2):180.Chicago/Turabian Style
Gonzalez Rodriguez, Pablo; Dral, A. P.; van den Nieuwenhuijzen, Karin J.H.; Lette, Walter; Schipper, Dik J.; ten Elshof, Johan E. 2018. "Thermochemical Stability and Friction Properties of Soft Organosilica Networks for Solid Lubrication." Materials 11, no. 2: 180.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.