Shih-Chen Shi, Dieter Rahmadiawan, Chun-Wei Kang
This study investigates the development of silica (SiO2), cellulose nanocrystals (CNC), lignin, and polymethyl methacrylate (PMMA) composites to enhance wear and corrosion resistance for joint implants. The lignin and SiO2 fillers were grafted with polymer molecular chains, forming a network structure that effectively blocks corrosion pathways and reduces interchain spacing. CNC was added to further improve mechanical properties and act as lubricating additives. The resulting composite films demonstrated a 242% decrease in wear rate and a 135% reduction in the coefficient of friction with the addition of 0.01 wt% CNC. Corrosion resistance was significantly enhanced, with a 99.7% reduction in corrosion current density (Icorr) to 1.38 × 10−10 A/cm2 and a 1.145 V increase in corrosion potential (Ecorr) at an optimal CNC filler ratio. This research presents a promising approach to enhancing the longevity and performance of biomedical materials. © 2026 The Authors.
Department of Mechanical Engineering, National Cheng Kung University (NCKU), No.1, University Road, Tainan, 70101, Taiwan; Department of Mechanical Engineering, Universitas Negeri Padang, Sumatera Barat, Padang, 25173, Indonesia
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