水热法制备取向性纳米棒阵列及其性能研究

发布时间：2018-03-21 06:23

  本文选题：生物材料　切入点：薄膜　出处：《北京工业大学》2010年硕士论文　论文类型：学位论文

【摘要】： 一维纳米材料的制备有很多种方法,如热蒸发法、化学气相沉积法、水热法、模板法等,而水热法由于其设备简单、操作容易、成本低廉、反应温度低及有利于大规模生产等特点,越来越受到人们的青睐。本课题就基于不同的应用方面采用简单的水热法合成了两种一维纳米材料,包括羟基磷灰石(Ca_(10)(PO_4)_6(OH)_2,简称HA或者HAp)的纳米棒阵列、氧化锌纳米棒阵列(ZnO)。 对于羟基磷灰石纳米阵列的研究主要是基于骨组织中的无机成分羟基磷灰石是有取向性的,如果能够制备出同样取向性的羟基磷灰石薄膜对于提高植入体的生物活性方面有一定的帮助。对于氧化锌纳米阵列的研究则是重点研究纳米棒阵列的光波导和光散射性能。论文综合采用X射线粉末衍射(XRD),傅立叶变换红外吸收光谱(FTIR),透射电子显微镜(TEM),扫描电子显微镜(SEM),电子能谱(EDS),电感耦合高频等离子体发射光谱(ICP),紫外-可见光测试仪(UV)等手段研究了对所合成的物质进行表征和性能分析。本论文主要有以下几方面的工作: 1.本文采用水热法制备出氟含量递增的羟基磷灰石并对其生长机理方面进行的研究,研究了氟含量一定时其从20min-48h的生长过程,并对其生长机理进行了总结,发现了含氟羟基磷灰石的的二次定向组装行为。 2.在对羟基磷灰石生长规律研究的基础上,研究了水热条件下生长薄膜的条件,摸索出在水热反应温度为140℃,pH为10,水热反应时间大于24h的时候才可以得到钙磷相的薄膜,在反应时间大于48h时可以得到羟基磷灰石,但是取向是杂乱无章的。在水热条件下采用氧化锌籽晶层作为模板层在玻璃基体上制备了(0001)取向性较好的HA薄膜,为其应用进行前期的工艺研究和理论分析。得到的HA晶体端面呈六边形,属于典型的六方柱状晶体,晶体表面光滑、结晶完整,并且只有(0001)取向。在缓冲溶液中研究了该薄膜的溶解性能,发现溶解度很小,说明薄膜结晶性较好。 3.我们对ZnO纳米阵列的光波导和光散射性能进行了研究。结果表明:ZnO纳米阵列对可见光具有强散射性,并且入射光可以在纳米棒中进行光波传递。
[Abstract]:There are many methods for the preparation of one-dimensional nanomaterials, such as thermal evaporation, chemical vapor deposition, hydrothermal method, template method, etc. The hydrothermal method has the advantages of simple equipment, easy operation and low cost. The characteristics of low reaction temperature and favorable mass production are becoming more and more popular. In this paper, two kinds of one-dimensional nanomaterials were synthesized by simple hydrothermal method based on different applications. These nanorod arrays include hydroxyapatite (HA) and apatite (PO4), and zinc oxide nanorods (ZnO). The study of hydroxyapatite nanoarrays is mainly based on the orientation of the inorganic component hydroxyapatite in bone tissue. If the hydroxyapatite films with the same orientation can be prepared, it will be helpful to improve the bioactivity of the implants. The study of ZnO nanoarrays is focused on the optical waveguides and light of nanorods arrays. Scattering performance. X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), electron spectroscopy (EDS), inductively coupled high frequency plasma emission spectrometry (ICPX), UV-VIS-. The characterization and performance analysis of the synthesized materials were studied by means of visible light tester (UV) and so on. The main work of this thesis is as follows:. 1. Hydroxyapatite with increasing fluorine content was prepared by hydrothermal method and its growth mechanism was studied. The growth process of hydroxyapatite from 20min to 48h was studied when the fluorine content was fixed, and the growth mechanism was summarized. The secondary directional assembly behavior of fluorinated hydroxyapatite was found. 2. On the basis of the study of the growth law of p-hydroxyapatite, the conditions of film growth under hydrothermal condition were studied. The results showed that the film with calcium and phosphorus phase could be obtained only when the hydrothermal reaction temperature was 140 鈩，

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