赵莹等：铋层状结构压电陶瓷的制备与性能优化· 1531 ·第37卷第9期
Cl–和H2PO4–对有序多孔羟基磷灰石组成和形貌的影响
旵
王德平，周筠，孙建英，段祥，姚爱华，黄文
(同济大学材料科学与工程学院，先进土木工程材料实验室，上海 200092)
摘要：采用溶胶–凝胶法，制备了有序多孔羟基磷灰石(hydroxyapatite with highly ordered three-dimensional pores，HA-HODP)。在37℃，将HA-HODP 在CaCl2和Ca(H2PO4)2溶液中浸泡几天，通过X射线衍射、场发射扫描电子显微镜、Fourier变换红外光谱以及pH值等的测试手段分析、研究了Cl–和H2PO4–对HA-HODP组成和形貌的影响。结果显示：HA-HODP浸入到CaCl2溶液中，生成Ca5(PO4)3Cl和CaCO3相。Ca5(PO4)3Cl相的生成系Cl–取代了OH–；CaCO3相的生成系Ca2+在碱性环境下，与溶解在溶液中的CO2发生了反应。在Ca(H2PO4)2溶液中，由于存在过量H2PO4–，在HA-HODP 的表面生成了Ca9HPO4(PO4)5OH相。
关键词：羟基磷灰石；多孔材料；离子交换
中图分类号：TB303 文献标志码：A 文章编号：0454–5648(2009)09–1531–05
INFLUENCE OF Cl– AND H2PO4– ON COMPOSITION AND MORPHOLOGY OF HYDROXYAPATITE WITH HIGHLY ORDERED THREE-DIMENSIONAL PORES
WANG Deping，ZHOU Jun，SUN Jianying，DUAN Xiang，YAO Aihua，HUANG Wenhai
(School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials, Tongji
University, Shanghai 200092, China)
Abstract: Hydroxyapatite (HA) with highly ordered three-dimensional pores (HA-HODP) was fabricated via the sol–gel process. X-ray diffraction, field emission scanning electron microscope, fourier transform infrared spectroscopy, and pH measurement were performed to characterize the variations in the composition and morphology of HA-HODP, which was immerd in CaCl2 and Ca(H2PO4)2 aqueous solutions for veral days at 37℃. The results indicate that Ca5(PO4)3Cl and CaCO3 phas are formed when the HA-HODP is immerd in CaCl2 solution. It is shown that the formation of Ca5(PO4)3Cl pha is due to the ion substitution of OH– by Cl–, whereas the formation of CaCO3 is attributed to the reaction between Ca2+ and the CO2 dissolved in the aqueous solution under alkaline condition. Ca9HPO4(PO4)5OH is formed on the surface of the HA-HODP immerd i
n Ca(H2PO4)2 aqueous solution as a
result of the addition of abundant H2PO
4
–.
Key words: hydroxyapatite; porous materials; ion exchange
Calcium hydroxyapatite (Ca10(PO4)6(OH)2, HA) is one of the calcium phosphate-bad bioceramic materials that makes up the majority of the inorganic components of human bones and teeth. This makes HA an excellent ma-terial for clinical applications. As reported in the litera-ture [1–2], the application of calcium phosphates corre-spond to the structure and morphological properties of HA. So, in order to expand the scope of the application of this material, much rearch has been conducted to syn-thesize biomaterials corresponding to HA[3] with a porous structure. Hydroxyapatite, which has a porous structure, a large specific surface area and high porosity, might be important for biomedical applications as it could enhance the adhesion between the bone and the apatite implant. However, the pore structure and size of the materials cannot be controlled,[4] thereby producing the difficulty in the rearch process.
Recently, there has been great interest in fabricating materials with highly ordered three-dimensional pores due to their potential applications in non-linear optics,[5] nsors[6] catalysts or as removable scaffolds for the for-mation of highly ordered, macroporous materials.[7]
收稿日期：2009–04–09。修改稿收到日期：2009–06–23。
基金项目：国家自然科学基金(50572072；50702037)及上海科委纳米专项基金(0852nm05200)资助项目。
第一作者：王德平(1961—)，男，教授，博士研究生导师。Received date:2009–04–09. Approved date: 2009–06–23. First author: WANG Deping (1961–), male, Doctor, professor. E-mail: wdpshk@tongji.edu
第37卷第9期2009年9月
硅酸盐学报
JOURNAL OF THE CHINESE CERAMIC SOCIETY
Vol. 37，No. 9
September，2009
