Metal‐Driven Autoantifriction Function of Artificial Hip Joint

Autor: Qiaoyuan Deng, Qingguo Feng, Peipei Jing, Donglin Ma, Mengting Li, Yanli Gong, Yantao Li, Feng Wen, Yongxiang Leng
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Advanced Science, Vol 10, Iss 25, Pp n/a-n/a (2023)
Druh dokumentu: article
ISSN: 2198-3844
20230109
DOI: 10.1002/advs.202301095
Popis: Abstract The service life of an artificial hip joint is limited to 10–15 years, which is not ideal for young patients. To extend the lifespan of these prostheses, the coefficient of friction and wear resistance of metallic femoral heads must be improved. In this study, a Cu‐doped titanium nitride (TiNX–Cu) film with “autoantifriction” properties is deposited on a CoCrMo alloy via magnetron sputtering. When delivered in a protein‐containing lubricating medium, the Cu in TiNX–Cu quickly and consistently binds to the protein molecules in the microenvironment, resulting in the formation of a stable protein layer. The proteins adsorbed on the TiNX–Cu surface decompose into hydrocarbon fragments owing to the shear stress between the Al2O3/TiNX–Cu tribopair. The synergistic effect of the catalysis of Cu and shear stress between the Al2O3/TiNX–Cu tribopair transforms these fragments into graphite‐like carbon tribofilms with an antifriction property. These tribofilms can simultaneously reduce the friction coefficient of the Al2O3/TiNX–Cu tribopair and enhance the wear resistance of the TiNX–Cu film. Based on these findings, it is believed that the autoantifriction film can drive the generation of antifriction tribofilms for lubricating and increasing the wear resistance of prosthetic devices, thereby prolonging their lifespan.
Databáze: Directory of Open Access Journals
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