Development of zinc-halloysite nanotube/minerals substituted hydroxyapatite bilayer coatings on titanium alloy for orthopedic applications

作者：Chozhanathmisra M; Ramya S; Kavitha L; Gopi D^*

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2016, 511: 357-365.

DOI：10.1016/j.colsurfa.2016.10.018

• Zinc-halloysite nanotubes
• Substituted hydroxyapatite
• Bilayer
• Electrodeposition
• Antibacterial activity

In the present investigation, the zinc-halloysite nanotubes (Zn-HNT)/strontium (Sr2+), samarium (Sm2+) substituted hydroxyapatite (M-HA) bilayer coating is obtained on titanium alloy (Ti6Al4V) by electrode position and the Zn-HNT/M-HA bilayer coating can be successfully combined to produce the bioactive and corrosion resistance for orthopaedic applications.
The existence the of the as-developed Zn-HNT/M-HA bilayer coating on Ti6Al4V was confirmed by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), high resolution scanning electron microscopy (HRSEM), energy dispersive X-ray analysis (EDAX) and high resolution transmission electron microscopy (HRTEM). The effects of Zn-HNT/M-HA bilayer coating on anticorrosion property of Ti6Al4V were also investigated using electrochemical studies in the simulated body fluid (SBF) solution.
The antibacterial activity and in-vitro cell viability of the Zn-HNT/M-HA bilayer coating were investigated. As a result of these investigations, it is revealed that the Zn-HNT/M-HA bilayer coating on Ti6Al4V improved the anticorrosion performance and the combination of Zn-HNT and M-HA in the bilayer coating significantly enhanced the bioactivity of the as coated Ti6Al4V which is potential for orthopedic applications.

• 出版日期2016-12-20