Preparation and characterization of Mg-HA/PLA composites

In order to further neutralize the acidity during the degradation of HA(hydroxyapatite)/PLA(poly lactide acid) composites, a new type Mg-HA/PLA composites was proposed. The Mg-HA/PLA composites were prepared by using the solution blending method and combining injection molding process. The morphology and physical phase constitute of Mg-HA/PLA composites were analyzed by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD). The mechanical properties of composites materials were tested by electronic tensile testing machine, the simulated body fluid(SBF) was used to study the degradation behavior of Mg-HA/PLA composites. The results showed that Mg-HA/PLA composites were successfully fabricated by the solution blending method and combining the injection molding process, HA and Mg particles didn't aggregated obviously in the PLA matrix and they maintained their phases respectively, the addition of 1.5wt% Mg had little effect on the mechanical properties of 5wt% HA/PLA composites, after 4 th week, the pH value of solution of Mg-HA/PLA composites was 7.41, while the pH of the HA / PLA composites was 6.95.