Effect of MoS2/polydopamine coating on surface properties and biocompatibility of Ti implants

서지정보

· 발행기관 : 대한치과재료학회
· 수록지 정보 : 대한치과재료학회지 / 51권 / 3호 / 129 ~ 143페이지
· 저자명 : 유민서, 송요한, 한미경

초록

This study investigates the role of polydopamine (PDA) as an intermediate layer for enhancing the adhesion, surface properties and corrosion resistance of molybdenum disulfide (MoS2) coatings on titanium (Ti) implants. Two approaches are compared: one involving direct MoS2 coating on Ti and the other involving MoS2 coating on PDA-treated Ti surfaces. The modified surfaces are comprehensively characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and scanning electron microscopy (SEM). Characterization results from Raman spectroscopy and SEM confirm that the PDA layer facilitates more uniform and finely structured MoS2 coatings. Wettability tests demonstrate that MoS2-PDA-treated surfaces exhibit improved hydrophilicity compared to direct MoS2 coatings. Corrosion resistance tests using potentiodynamic polarization reveal that MoS2-PDA-treated samples show a lower corrosion current density and more noble corrosion potential compared to directly coated MoS2 samples. Cell viability assays show comparable biocompatibility for both MoS2-PDA-treated and direct MoS2-coated surfaces, with a slight preference for the MoS2 group in terms of cell compatibility. These findings suggest that while the PDA interlayer improves structural and surface properties, further studies are needed to fully understand the biocompatibility differences between the two approaches. The PDA interlayer still shows promise in enhancing surface properties and corrosion resistance for potential orthopedic applications.

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