Paper Type |
Contributed Paper |
Title |
Sol-gel synthesis and characterization of strontium/zinc-substituted hydroxyapatites |
Author |
Hemun Paennarin*[a] and Suphasinee L. Seet [a,b] |
Email |
chocolateiceberg@hotmail.com |
Abstract: Ionic substitutions in hydroxyapatite (HA) have been excessively studied in order to improve its properties. Among various ions, strontium (Sr) and zinc (Zn) have attracted remarkable interest for their possible biological relevance. The incorporation of Sr and Zn ions in HA could promote bone formation and retard bone absorption. Moreover, Zn ion has been used as an antibacterial agent. In this work, Sr/Zn-substituted hydroxyapatites (Sr/Zn-HA) were prepared via a sol-gel method in water:ethanol solution. Calcium nitrate tetrahydrate, strontium acetate and zinc acetate were used as starting materials. They were mixed at various Ca:M mole ratios, where M is Sr/Zn at the mole ratio of 1:1. The structural, functional and morphological characterizations were carried out on the calcined powders. It was found that HA is the main phase for all samples, with CaZn2(PO4)2(H2O)2 and ZnSr(HPO3)2(H2O)2 as second phases when the Ca:M mole ratio was 0.5 or above. As the amounts of Sr/Zn were higher, the lattice parameter a increased, on the other hand, the lattice parameter c decreased. Broadening and shifting of FT-IR spectra also supported the ion substitution in the HA structure. The calculated crystal sizes did not change much with the ion substitution. Finally, the crystal sizes obtained from SEM micrographs were much bigger than the calculated ones suggesting the agglomeration of the nanocrystallites. |
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Start & End Page |
1055 - 1060 |
Received Date |
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Revised Date |
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Accepted Date |
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Keyword |
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Volume |
Vol.40 No.6 SPECIAL ISSUE 2 |
DOI |
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Citation |
Paennarin H. and Seet S.L., Sol-gel synthesis and characterization of strontium/zinc-substituted hydroxyapatites, Chiang Mai J. Sci., 2013; 40(6): 1055-1060. |
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