(A–C) Tensile stress–strain curves, UTS,
and Young’s
modulus of pure PDLA, the biomimetic Sr/Cu-doped 1D HA/PDLA composite
with 25 wt % Sr/Cu-doped 1D HA, and the Nano HA/PDLA composite with
25 wt % Nano HA, respectively. (D–F) SEM micrographs of the
fracture surface after the tensile test of pure PDLA, the biomimetic
Sr/Cu-doped 1D HA/PDLA composite with 25 wt % Sr/Cu-doped 1D HA, and
the Nano HA/PDLA composite with 25 wt % Nano HA, respectively. (G–I)
Compressive stress–strain curves, compressive strength, and
compressive modulus of pure PDLA, the biomimetic Sr/Cu-doped 1D HA/PDLA
composite with 25 wt % Sr/Cu-doped 1D HA, and the Nano HA/PDLA composite
with 25 wt % Nano HA, respectively. (*) for p <
0.05, (**) for p < 0.01, (***) for p < 0.001, and (****) for p < 0.0001.