Development of Polydopamine Coating on Biodegradable Zn Implant for Cardiovascular Stent Application

Document Type

Conference Proceeding

Publication Date

1-1-2026

Abstract

Bioactive polymerPolymer-metal ion coatings on biodegradable implantsBiodegradable implant can significantly enhance biocompatibilityBiocompatibility and support vascular remodeling through controlled metal ion release. Mussel-inspired polydopamine (PDA) is a biocompatible polymerPolymer that forms strong bonds with metal surfaces using its catechol and amine groups. Its potential for secondary functionalization makes it ideal for creating bioactive coatings. In this study, PDA coatings loaded with copper ions (PDA-Cu) were applied to zincZinc (Zn) implants using an immersion method. The microstructureMicrostructure of the PDA-Cu coating revealed the deposition of spherical polydopamine particles on the substrate surface, measuring 150–160 nm in diameter, which indicates a homogeneous PDA-Cu coating on the Zn substrate. The PDA-Cu coatings were characterized using Fourier Transform Infrared (FTIR) spectroscopy and X-ray Photoelectron Spectroscopy (XPS), confirming uniform chemical bonding. The successful formation of a homogeneous PDA-Cu layer on Zn improved the corrosionCorrosion resistance of the implants. Electrochemical tests showed that the corrosionCorrosion rate decreased from approximately 0.8 to 0.3 mm/year after applying the PDA-Cu coating. This reductionReduction in corrosionCorrosion rate compared to bare zincZinc suggests enhanced degradation control, making it a promising option for implant applications.

Publication Title

Minerals Metals and Materials Series

ISBN

[9783032138279]

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