졸-겔법을 이용한 은 담지 하이드록시아파타이트의 제조
Preparation of Silver-doped Hydroxyapatite Using Sol-gel Method
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Abstract
In the present study, silver-doped antibacterial hydroxyapatites were successfully prepared by the sol-gel method. For the starting solution, the molar ratio of Ca(NO3)2·4H2O, P(OC2H5)3, C2H5OH, and H2O was set to 0.075:0.045:20:0.135; AgNO3 was added to a ratio of Ag to total cation concentration of 0.5-12 mol%. The prepared sol was dried at 100℃ for 48h and heat-treated at 1000℃ for 2h to obtain particles in the 200-500 nm size range. The product from the synthesis of silver-doped hydroxyapatite was investigated through X-ray diffraction experiments and scanning electron microscopy. The product showed high antibacterial properties, with a disinfection ratio of Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 25922) over 99.9% as calculated from an antimicrobial effects evaluation by the shake flask method.
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