Mechanical properties and in vitro degradation behavior of additively manufactured phosphate glass particles/fibers reinforced polylactide

Abstract

Phosphate glass/polylactide (PG/PLA) composites were additively manufactured via fused deposition modeling. The incorporation of 10 wt % PG particles improved the flexural modulus of composites by ~14% (3.53 GPa) but led to 5% reduction in flexural strength (92.4 MPa). The trend was more pronounced as the particle loading doubled. Comparing to a particulate composite of the same weight fraction, milled PG fibers (PGFs) reinforcement led to more effectively improved flexural modulus (~30%, 4.10 GPa). After 28 days of in vitro degradation in phosphate buffered saline, the particulate composites lost more than 30% of their initial mechanical properties, in contrast to less than 10% reduction of strength/modulus reported from fiber reinforced composites. The additively manufactured PG/PLA matrix composites have potential for application as customized bone fixation plates to repair the fractures under modest load‐bearing applications. © 2019 The Authors. Journal of Applied Polymer Science published by Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48171.

Additive-Manufactured Gyroid Scaffolds of Magnesium Oxide, Phosphate Glass Fiber and Polylactic Acid Composite for Bone Tissue Engineering

“…Recently, the PG/PLA composites were successfully fabricated via fused deposition modelling (FDM). Patient-specific fixation plates and porous BTE scaffold with the well-defined porous structure were successfully prepared [ 19 , 20 ]. Comparing to phosphate glass particles, the milled phosphate glass fibers (PGF) induced more effective mechanical reinforcement and a prolonged term of degradation of the corresponding PG/PLA composite [ 19 ].…”

A comparative study for the behavior of 3D‐printed and compression molded PLA/POSS nanocomposites

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