Wear behavior of non-hydrogenated and hydrogenated dlc films under protein lubricated condition
The differences in structure and wettability of diamond like carbon (DLC) films can influence the outcome of a wear test under protein lubricated condition. The aim of this study is to analyze the wear behavior of different structure of DLC films (ta-C and a-C:H) under bovine serum albumin as an att...
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| Main Authors: | , , , |
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| Format: | Article |
| Published: |
Malaysian Tribology Society (Mytribos)
2020
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/86880/ https://jurnaltribologi.mytribos.org/v25/JT-25-136-145.pdf. |
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| Summary: | The differences in structure and wettability of diamond like carbon (DLC) films can influence the outcome of a wear test under protein lubricated condition. The aim of this study is to analyze the wear behavior of different structure of DLC films (ta-C and a-C:H) under bovine serum albumin as an attempt to simulate synovial fluid protein in artificial joints. The hardness, structure and surface wettability of films were investigated. Fourier transform infrared spectroscopy (FT-IR) was employed to investigate changes of protein conformation on the film surfaces after incubation for 24 h at 37°C. The wear behavior of DLC films and its counterpart, ultra-height molecular weight polyethylene (PE) were assessed by reciprocating tribo tester. There is a correlation between surface wettability, protein absorption and wear behavior, and in this study, it has been found that the surface of a hydrophobic a-C:H film tends to bind more protein due to the contribution of hydrogen bonds. As a result, the wear rate of PE against a-C:H film is found to be low due to adsorbed protein acts as a lubricant film and protects the surface from wear. |
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