The Lubricating Properties of Human Whole Saliva

@article{Bongaerts2007TheLP,
  title={The Lubricating Properties of Human Whole Saliva},
  author={J.H.H. Bongaerts and Damiano Rossetti and Jason R Stokes},
  journal={Tribology Letters},
  year={2007},
  volume={27},
  pages={277-287}
}
We demonstrate the efficient boundary lubricating properties of human whole saliva (HWS) in a soft hydrophobic rubbing contact, consisting of a poly(dimethylsiloxane) (PDMS) ball and a PDMS disk. The influence of applied load, entrainment speed and surface roughness was investigated for mechanically stimulated HWS. Lubrication by HWS results in a boundary friction coefficient of μ ≈ 0.02, two orders of magnitude lower than that obtained for water. Dried saliva on the other hand results in μ ≈ 2… CONTINUE READING

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