Evaluating the Mechanical and Tribological Properties of 3D Printed PLA/n-HA/PA66 Composite

Artificial implants are necessary for orthopedic treatment and the recovery of bone and joint function in disabled individuals. However, existing materials present challenges in manufacturing complex structures and are limited in terms of mechanical and frictional properties. Current research is focused on the development of new environmentally friendly polymer composites for the manufacture of artificial implants, combined with 3D printing technology to improve design flexibility. In this study, nine kinds of PLA/n-HA/PA66 composite scaffolds with different proportions were prepared using light-curing 3D printing technology. The physical, mechanical, and tribological properties of the composite scaffolds were compared. The results showed that the PLA/n-HA/PA66 composite scaffold was superior to traditional polymers, with compressive strength increased by 30-40 MPa and wear resistance increased by 27%-64%. This indicates that it has wide application potential in bone tissue engineering.