A novel method to synthesize hydroxyapatite coating with hierarchical structure.
A novel process has been developed for the preparation of a hydroxyapatite (HA) coating with a hierarchical structure on a Ti substrate. The Ti substrate was first subjected to electrolytic deposition at -1.6V (versus Ag/AgCl/KCl) in a solution of 0.042M Ca(NO(3))(2)·4H(2)O and 0.025M NH(4)H(2)PO(4) at 85°C for 3min, and then post-treated in a 0.25M NaOH solution, with the addition of 0.05M Na(3)Cit at 85°C for 5h. The experimental results showed that the coating experienced a phase conversion from octacalcium phosphate to HA after the post-treatment step. The HA coating had well-distributed, micro-sized pores comprising three-dimensional interconnected mesoporous HA belts, which would greatly increase the porosity and surface area of the coating.
Department of Materials Science and Engineering, Zhejiang University, 38# Zheda Road, Hangzhou 310027, China. dylin@yahoo.cn
Dong-Yang
DY
Lin
Xiao-Xiang
XX
Wang
D020099:Coated Materials, Biocompatible / Q000737:chemistry; D003460:Crystallization; D017886:Durapatite / Q000737:chemistry*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning / Q000379:methods; D016062:Porosity; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014025:Titanium / Q000737:chemistry
D020099:Coated Materials, Biocompatible; D017886:Durapatite; D014025:Titanium