Detail publikace

The Influence of Proteins and Speed on Friction and Adsorption of Metal/UHMWPE Contact Pair

NEČAS, D. SAWAE, Y. FUJISAWA, T. NAKASHIMA, K. MORITA, T. YAMAGUCHI, T. VRBKA, M. KŘUPKA, I. HARTL, M.

Anglický název

The Influence of Proteins and Speed on Friction and Adsorption of Metal/UHMWPE Contact Pair

Typ

Článek Scopus

Jazyk

en

Originální abstrakt

It was reported in several studies that friction and wear of joint prosthesis are apparently influenced by the proteins contained in the synovial fluid. However, detailed mechanisms of these tribological processes have not been clarified yet. The present study aims on the effect of adsorbed protein film on frictional behaviour of metal/polyethylene contact pair. Reciprocating pin-on-plate test was conducted, while the CoCrMo pin was sliding against UHMWPE plate. The contact was lubricated by various solutions of albumin and γ-globulin solved in PBS. After the friction test, the thickness of adsorbed film was evaluated using spectroscopic ellipsometry. Structure of the adsorbed proteins was later examined by FT-IR. The results showed that at low sliding speed equal to 10 mm/s, there was a linear correlation between the friction coefficient and the thickness of the adsorbed protein film. An increase of friction was thus accompanied by the evolution of protein film. In that case, both proteins undergone substantial conformational changes, losing their original structure. On the contrary, proteins could sustain their secondary structure to some extent at higher sliding speed (50 mm/s), when different behaviour of the both proteins could be observed. This phenomenon was attributed to different structure of albumin and γ-globulin in its native state. It might be concluded that friction coefficient of metal-on-polyethylene joint prosthesis is influenced by protein content, as well as kinematic conditions, since the sliding conditions have a certain effect on both the adsorbed film formation and structure of the adsorbed molecules.

Klíčová slova anglicky

Joint prosthesis; proteins; friction; UHMWPE; adsorption

Vydáno

2017-09-01

Nakladatel

Elsevier

Místo

United Kingdom

ISSN

2352-5738

Časopis

Biotribology

Ročník

11

Číslo

2017

Strany od–do

51–59

Počet stran

9

BIBTEX


@article{BUT135440,
  author="NEČAS, D. and SAWAE, Y. and FUJISAWA, T. and NAKASHIMA, K. and MORITA, T. and YAMAGUCHI, T. and VRBKA, M. and KŘUPKA, I. and HARTL, M.",
  title="The Influence of Proteins and Speed on Friction and Adsorption of Metal/UHMWPE Contact Pair",
  journal="Biotribology",
  year="2017",
  volume="11",
  number="2017",
  pages="51--59",
  doi="10.1016/j.biotri.2017.03.003",
  issn="2352-5738",
  url="http://www.sciencedirect.com/science/article/pii/S2352573816300749"
}