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| SiO2包覆的羟基磷灰石纳米粒子的制备与性能研究 | |
| 引用本文： | 王洪新,陈晓明,王友法,程东霁.SiO2包覆的羟基磷灰石纳米粒子的制备与性能研究[J].功能材料,2012,43(11):1434-1437,1442. |
| 作者姓名： | 王洪新 陈晓明 王友法 程东霁 |
| 作者单位： | 1. 武汉理工大学生物材料与工程研究中心,湖北武汉,430070 2. 广州医学院生物医学工程系,广东广州,510182 3. 皖西学院机械与电子工程学院,安徽六安,237012 |
| 基金项目： | 广东省科技攻关资助项目 |
| 摘 要： | 采用正硅酸乙酯(TEOS)水解法在羟基磷灰石粉体表面包覆SiO2进行表面改性,并通过扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、红外(FT-IR)、zeta电位和沉降实验等对样品的晶体结构、颗粒形貌进行了表征,结果表明涂层厚度约为3nm,包覆后的纳米粒子在水溶液中的胶体稳定性提高了5倍,SiO2在羟基磷灰石表面的吸附符合异质凝结机制。 |
| 关 键 词： | 羟基磷灰石 表面修饰 正硅酸乙酯 纳米粒子 |
Research on preparation and property of silica-coated HAP particles |
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| WANG Hong-xin,CHEN Xiao-ming,WANG You-fa,CHENG Dong-ji.Research on preparation and property of silica-coated HAP particles[J].Journal of Functional Materials,2012,43(11):1434-1437,1442. | |
| Authors: | WANG Hong-xin CHEN Xiao-ming WANG You-fa CHENG Dong-ji |
| Affiliation: | 1.Biomedical Materials and Engineering Research Center,Wuhan University of Technology,Wuhan 430070,China;2.Department of Biomedical Engineering,Guangzhou Medical University,Guangzhou 510182,China;3.Deptment of Mechanical and Electronic Engineering,West Anhui University,Lu’an 237012,China) |
| Abstract: | Nanophase hydroxyapatite(HAP) particles were coated with silica via the hydrolysis of tetraethyl orthosilicate(TEOS).The nanocomposite particles were characterized by transmission electron spectroscopy(TEM),scaning electronmicroscopy(SEM),X-ray diffraction(XRD),Fourier transform infrared(FT-IR) spectroscopy,sedimentation timeand zeta potential(ζ) studies.A sequential changes in infrared spectral features characteristic of HAP was accompanied by an increase in features characteristic of silica as revealed by FT-IR.The silica coating enhanced the colloidal stability of HAP in aqueous suspensions.This behavior can be explained based on a heterocoagulation coating mechanism in which silica clusters adsorb onto the HAP particle surface. |
| Keywords: | hydroxyapatite surface modification TEOS nanoparticles |
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