Fabrication and Bioactivity of Porous Hydroxyapatite Coating by Electrophoretic Deposition Using Different Porogens

doi:10.3724/SP.J.1095.2011.00070

Chinese Journal of Applied Chemistry ›› 2012, Vol. 29 ›› Issue (01): 46-51.DOI: 10.3724/SP.J.1095.2011.00070

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Fabrication and Bioactivity of Porous Hydroxyapatite Coating by Electrophoretic Deposition Using Different Porogens

ZHANG Lan, HUANG Ziyang^*

(College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007)

Received:2011-02-22 Revised:2011-05-13 Published:2012-01-10 Online:2012-01-10
Contact: HUANG Ziyang

Abstract

Abstract:

To improve the bioactivity and adhesion strength of hydroxyapatite(HA) coatings on titanium substrate, porous nano-HA coatings were deposited on titanium substrate using porogens such as glucose, starch and chitosan by electrophoretic deposition and sintering processes. The changes of surface morphology, chemical composition and phase composition of the porous HA coatings before and after immersion in simulated body fluid(SBF) were also investigated. The results showed that the porous HA coating was obtained by sintering at 700 ℃. These porous HA coating surfaces were covered by carbonate-apatite particles after immersion in 1.5 times ion concentration of SBF for 5 days, with diameter about 5~25 μm, indicating that these coatings possessed an excellent bioactivity on its surface. The adhesion strength between coating and substrate was up to 19.5 MPa using CS as porogens. The developed method is promising to develop new implant bioceramic materials of human bone.

Key words: electrophoretic deposition, titanium substrate, porous hydroxyapatite, carbonate-apatite, bioactivity

CLC Number:

ZHANG Lan, HUANG Ziyang*. Fabrication and Bioactivity of Porous Hydroxyapatite Coating by Electrophoretic Deposition Using Different Porogens[J]. Chinese Journal of Applied Chemistry, 2012, 29(01): 46-51.

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Fabrication and Bioactivity of Porous Hydroxyapatite Coating by Electrophoretic Deposition Using Different Porogens

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