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2025
Nov
23
Research Paper: From Filament to Print: Structural Evolution and Its Impact on the Mechanical Properties of PEEK–HA–Mg₂SiO₄ Composites
Our Centre PI Prof Naresh Kumar and his research team have published a new paper titled “From Filament to Print: Structural Evolution and Its Impact on the Mechanical Properties of PEEK–HA–Mg₂SiO₄ Composites”, presenting advances in 3D printable, bioactive polymer composites for orthopedic and spinal implant applications.
While polyether ether ketone (PEEK) is valued for its biocompatibility and mechanical performance, its limited osteoconductivity restricts broader clinical use. This study addresses this challenge through the development of a PEEK-based composite reinforced with hydroxyapatite (HA) and magnesium orthosilicate (Mg₂SiO₄), formulated for extrusion-based additive manufacturing.
The composite was successfully processed into filaments and fabricated using Fused Deposition Modeling (FDM). Detailed structural and compositional analyses revealed differences between filament and printed parts that directly influenced mechanical behaviour. Mechanical testing showed significant improvements in flexural strength and modulus, alongside moderate enhancements in tensile properties compared to unfilled PEEK. Importantly, cell studies using SAOS-2 cells demonstrated high viability on both filament and printed surfaces, confirming the cytocompatibility of the composite.
These findings underscore the importance of filler dispersion and interfacial bonding in tailoring the mechanical performance of 3D printed composites and highlight the potential of this material system for customised, load-sharing orthopedic implants.
Read the review paper here
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