Thứ hai, 09/06/2025 | 21:20 GMT+7
Abstract In this paper, the effects of hydrothermal and calcination conditions on the structure of nano-hydroxyapatite synthesized from Thunnus tonggol bone were studied. The characteristics of samples were determined by various techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and optical X-ray fluorescence spectroscopy (XRF). XRD results showed that the hydrothermal and calcination conditions affect the crystallinity and purity of nano-hydroxyapatite product. The suitable conditions for the synthesis of nano-hydroxyapatite have been proposed such as hydrothermal at 120°C in 7 hours and calcination at 800°C in 1 hour. Under the conditions, the hydroxyapatite had the nanoparticle size in a range of 30–100 nm, and reached a BET surface area of 15.8 m2/g, a pore volume of 0.018 cm3/g, and a pore diameter of 23.0 Å. The molar ratio of Ca/P in the nano-hydroxyapatite was 1.67, which would be the expected ratio for hydroxyapatite. The nano-hydroxyapatite product has high crystallinity and biological compatibility when tested in Simulated Body Fluid (SBF). Keywords: nano-hydroxyapatite, Thunnus tonggol, biocompatibility, fish bone |
Đối với ngành da giày, các hiệp định thương mại tự do không chỉ mang lại cơ hội gia tăng xuất khẩu mà còn thúc đẩy sự đổi mới, chuyển đổi chuỗi cung ứng và cải thiện chất lượng sản phẩm để đáp ứng các tiêu chuẩn quốc tế.
04/06/2025