Journal of Magnesium and Alloys, cilt.12, sa.9, ss.3758-3771, 2024 (SCI-Expanded)
Magnesium
(Mg) stands out in temporary biomaterial applications due to its
biocompatibility, biodegradability, and low Young's modulus. However,
controlling its corrosion through next-generation polymer-based
functional coatings is crucial due to the rapid degradation behavior of
Mg. In this study, the function of 2D lamellar Ti3C2Tx
(MXene) in Hydroxyapatite (HA) and Halloysite nanotube (HNT) hybrid
coatings in biodegradable poly– (lactic acid) (PLA) was investigated.
The morphological and structural characterizations of the coatings on Mg
were revealed through HRTEM, XPS, SEM-EDX, XRD, FTIR, and contact angle
analyses/tests. Electrochemical in vitro corrosion tests (OCP,
PDS, and EIS-Nyquist) were conducted for evaluate corrosion resistance
under simulated body fluid (SBF) conditions. The bioactivity of the
coatings in SBF have been revealed in accordance with the ISO 23,317
standard. Finally, antibacterial disk diffusion tests were conducted to
investigate the functional effect of MXene in coatings. It has been
determined that the presence of MXene in the coating increased not only
surface wettability (131°, 85°, 77°, and 74° for uncoated, pH, PHH, and
PHH/MXene coatings, respectively) but also increased corrosion
resistance (1857.850, 42.357, 1.593, and 0.085 × 10–6, A/cm2 for uncoated, pH, PHH, and PHH/MXene coatings, respectively). It has been proven that the in vitro
bioactivity of PLA-HA coatings is further enhanced by adding HNT and
MXene, along with SEM morphologies after SBF. Finally, 2D lamellar
MXene-filled coating exhibits antibacterial behavior against both E. coli and S. aureus bacteria.