Stability-limited ion-exchange of calcium with zinc in biomimetic hydroxyapatite
نویسندگان
چکیده
The exchange of Ca2+ ions in hydroxyapatite (HAp) with Zn2+ into Zn-HAp is interest for applications ranging from bone tissue engineering to the use as a precursor subsequent ion-exchange reactions. Previous studies, using direct synthesis, showed that ~ 20 mol% can be incorporated HAp, before byproducts are observed. However, this realized at cost loss crystallinity and control over crystal size shape increasing amounts ion incorporation. In work simple post-synthetic strategy formation has been investigated. By merely exposing HAp high concentrations zinc nitrate water, up 22 displaced by without any measured preservation crystallite shape. It was found incorporation destabilizes crystals resulting their gradual dissolution reprecipitation. Consequently, promoting Zn2+ions increased reaction times, sonication temperature results an precipitation hopeite crystals, thereby preventing more rich Zn-HAp.
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ژورنال
عنوان ژورنال: Materials & Design
سال: 2021
ISSN: ['1873-4197', '0264-1275']
DOI: https://doi.org/10.1016/j.matdes.2021.109846