کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1492205 | 992373 | 2007 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis of amorphous calcium phosphate using various types of cyclodextrins Synthesis of amorphous calcium phosphate using various types of cyclodextrins](/preview/png/1492205.png)
Amorphous calcium phosphate (ACP) was synthesised in aqueous solution at room temperature using cyclodextrins. Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX) and thermal analysis (DTA/TGA) were performed on the calcium phosphate precipitates obtained from solutions. We observed that only β-CD could stabilise the amorphous phase in the mother solution because of the lower solubility of β-CD in water and the ACP remained stable in aqueous solution for more than 24 h at room temperature. The ACP particle has an initial particle size of less than 40 nm, Ca/P molar ratio of 1.67 and β-CD absorbed on its surface. The mechanism for the stabilisation of ACP is proposed.
Journal: Materials Research Bulletin - Volume 42, Issue 5, 3 May 2007, Pages 820–827