摘要
利用简单的氨气扩散的方法分别合成出了花状多孔和空心微球羟基磷灰石,研究了磷酸根浓度和非离子表面活性剂PVA对最终产物羟基磷灰石形貌的影响,并用场发射扫描电子显微镜(FESEM)、傅里叶变换红外光谱(FT-IR)、X射线衍射等方法对所得产物进行了表征。研究结果显示,在不含有PVA的溶液中,最初形成的物质为无定形磷酸钙(ACP),其随后转变为花状羟基磷灰石;增加磷酸根的浓度而保持钙离子浓度不变,得到的最终产物为空心羟基磷灰石微球。在溶液中加入非离子表面活性剂PVA,无论是否改变磷酸根浓度,得到的产物均为花状羟基磷灰石。
Flowerlike porous hydroxyapatite spheres and hollow microspheres were fabricated by the decomposition of ammonia. The obtained products were characterized by X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM） and Fourier transform infrared （FT-IR） spectroscopy, and the effect of concentration of PO43 - and the addition of nonionic surfactant PVA on the morphologies of obtained hydroxyapatite were investigated. The results revealed that, in the absence of PVA, the phase initial formed was amorphous calcium phosphate （ACP） spheres. Afterwards, the precursor ACP transformed to flowerlike HAp; keeping the concentration of Ca2~ constant, when the concentration of PO34- increased, the finial product was still HAp, but the morphology changed to hollow microspheres. the contrary, in the present of PVA, whether changing the concentration of PO43- , the morphology of the products was flowerlike consistently. On the basis of our elucidation of the mechanism for growth of HAp architectures experimental results, a phenomenological has been proposed.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2014年第1期153-158,共6页
Bulletin of the Chinese Ceramic Society
基金
安徽省高等学校自然科学研究重点项目(KJ2011A196)
关键词
羟基磷灰石
气相扩散
合成
微球
hydroxyapatite
vapor-diffusion
synthesis
microsphere
