@article{YAN2023, 
author = {Shuai YAN and Shichao MEN and Hongbo ZOU and Haoji WANG and Zhongjiang ZHANG and Chunshen WANG and Tianyi SUI and Bin LIN},
title = {Carbon fiber cannot always reduce the wear of PEEK for orthopedic implants under DPPC lubrication},
year = {2023},
journal = {Friction},
volume = {11},
number = {3},
pages = {395-409},
keywords = {self-assembly, polyetheretherketone (PEEK), carbon fiber-reinforced PEEK (CF-PEEK), dipalmitoylphosphatidylcholine (DPPC), orthopedic implants},
url = {https://www.sciopen.com/article/10.1007/s40544-022-0604-y},
doi = {10.1007/s40544-022-0604-y},
abstract = {Excellent wear resistance is an important feature of orthopedic implants. However, although pure polyetheretherketone (PEEK) is outperformed by carbon fiber-reinforced PEEK (CF-PEEK) for stability and durability under laboratory conditions, it is not clear whether CF-PEEK should be preferred in all real-world applications. Results indicate that, under dipalmitoylphosphatidylcholine (DPPC) lubrication, the wear rates of PEEK are 35%–80% lower than the wear rates of CF-PEEK for different implant materials, speeds, loadings, and DPPC concentrations. Molecular dynamics calculations confirm that DPPC self-assembles on the PEEK surface to form an easily adsorbed continuous phospholipid lubricating film. In contrast, the carbon fibers on the CF-PEEK surface hinder the formation of the protective DPPC film and the CF-PEEK surface is thus subject to faster wear.}
}