Effect of thermal treatment on carbonated hydroxyapatite: Morphology, composition, crystal characteristics and solubility
Effect of thermal treatment on carbonated hydroxyapatite: Morphology, composition, crystal characteristics and solubility
复制标题
热处理对碳酸羟基磷灰石的影响：形态、成分、晶体特征和溶解度
DOI：
10.1016/j.ceramint.2014.11.062
复制
发表时间：
2015-06-01
影响因子：
5.2
通讯作者：
Darvell, Brian W.
中科院分区：
文献类型：
--
作者：
Liu, Quan;Matinlinna, Jukka Pekka;Darvell, Brian W.
热处理是从骨骼和牙齿中回收生物磷灰石的常用方法之一。然而，这对它的物理化学和生物学特性的影响尚未得到充分考虑。作为一种简化的研究模型，碳酸化羟基磷灰石被假定为具有类似于生物磷灰石的特性，用于研究热处理对其物理化学性质的影响。制备碳酸化羟基磷灰石并在600-1000 ℃下加热。测定了样品的形貌、化学组成、晶体特征、官能团和溶解度。对于在800摄氏度及以上加热的材料，观察到晶体生长和聚集。随着加热温度的升高，碳酸盐和水的含量降低，而结晶度增加。所制备的材料以及在600和700摄氏度加热的材料的溶解度高于羟基磷灰石的参考曲线，而其余材料的溶解度与后者重叠。这些变化表明，涉及高温的制备方法可能不适合于回收“生物”磷灰石;在所有这些工作中，必须考虑到碳酸盐对磷酸钙表观溶解度的重要性。(C)2014 Elsevier Ltd和Techna Group S.r.l. All rights reserved.
Thermal treatment is one of the common methods used in the recovery of biological apatite from bones and teeth. However, the effect of this on its physicochemical and biological properties has not yet been given full consideration. As a simplified research model with characteristics assumed to be similar to biological apatite, carbonated hydroxyapatite was used to study the effect of thermal treatment on its physicochemical properties. Carbonated hydroxyapatite was prepared and heated at 600-1000 degrees C. The morphology, chemical composition, crystal characteristics, functional groups and solubility of the as-prepared and heated samples were determined. Crystal growth and aggregation were observed for materials heated at 800 degrees C and above. With increase of heating temperature, carbonate and water content decreased, while the crystallinity increased. The solubility of as-prepared material and those heated at 600 and 700 degrees C was higher than the reference curve for hydroxyapatite, while that of the rest overlapped the latter. Such changes indicate that the preparation approaches involving high temperature may not be appropriate for the recovery of 'biological' apatite; and that the importance of carbonate to the apparent solubility of calcium phosphate must be taken into account in all such work. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.