Carbon fiber cannot always reduce the wear of PEEK for orthopedic implants under DPPC lubrication

Friction

Research Article

Shuai Yan¹  Tianyi Sui¹  Hongbo Zou¹  Bin Lin¹  Haoji Wang¹  Shichao Men¹  Zhongjiang Zhang¹  Chunshen Wang¹ 

[1] Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China;

关键词: polyetheretherketone (PEEK);    carbon fiber-reinforced PEEK (CF-PEEK);    dipalmitoylphosphatidylcholine (DPPC);    orthopedic implants;    self-assembly;   

DOI  :  10.1007/s40544-022-0604-y

 received in 2021-10-21, accepted in 2022-01-29,  发布年份 2022

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY   
© The author(s) 2022

【 图 表 】

Fig. 2