Enhanced corrosion resistance and biocompatibility of AZ31 Mg alloy using PCL/ZnO NPs <i>via</i> electrospinning

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>In the efforts to improve corrosion resistance and biocompatibility of magnesium alloys, polycarprolactone (PCL) and zinc oxide nanoparticles (ZnO NPs) composite coatings were applied onto AZ31 Mg alloys <I>via</I> electrospinning technique in this study. The PCL/ZnO composite coatings on Mg alloys were characterized by using FE-SEM, EDX, XPS, and FT-IR. Moreover, coating adhesion test, electrochemical corrosion test, and biocompatibility test <I>in vitro</I> were performed to measure coating performance. Our results revealed that the increase in the content of ZnO NPs in the composite coatings not only improved the coating adhesion of composite coatings on Mg alloys, but also increased the corrosion resistance. Furthermore, the biocompatibility of MC3T3-E1 osteoblasts of the PCL/ZnO composite coated samples was superior to the biocompatibility of the bare samples. Such data suggest that applying PCL/ZnO composite coating to the magnesium alloys has suitable potential in biomedical applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> PCL/ZnO composite coating layer by electrospinning techniques showed the nano-scaled and porous surface structure. </LI> <LI> Addition of zinc oxide NPs in the PCL fibers led to enhanced coating adhesion and corrosion resistance. </LI> <LI> The composite coated surfaces on Mg substrates improved cell attachment and proliferation. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>