电诱导牙釉质表面羟基磷灰石涂层形成的研究  

Preparation of Hydroxyapatite Coatings on Enamel by Electrochemical Technique

作　　者：廖颖敏[1,2] 冯祖德[1] 雷彩霞[1] 

机构地区：[1]厦门大学材料学院,厦门361005 [2]厦门大学嘉庚学院环境科学与工程系,漳州363105

出　　处：《无机化学学报》2009年第7期1187-1193,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.30470434);卫生部科学研究基金(No.WKJ2008-2-54)资助项目

摘　　要：以含Ca(NO3)2、NH4H2PO4和NaNO3组成的溶液作为电解液,在人牙釉质表面电诱导制备了羟基磷灰石(HA)涂层。应用X射线衍射(XRD)﹑扫描电镜(SEM)和能谱分析(EDS)对形成涂层后的牙釉质样品进行分析和表征,研究了电解液初始pH值﹑电流密度和温度的变化对涂层的组成﹑结构和形貌的影响。研究结果表明这些因素对涂层的组分(HA)没有显著影响,而对涂层中HA晶体c轴的择优取向度的影响则较显著。当控制电解液的初始pH值为6﹑电流密度为0.5mA·cm-2﹑温度为55℃的时候,涂层中HA晶体沿c轴方向择优取向生长,且择优取向度和牙釉柱的HA较为接近。Hydroxyapatite （HA） coatings were successfully prepared on human enamel surfaces by electrochemical technique with the electrolyte of Ca（NO3）2, NH4H2PO4 and NaNO3. Their crystal structures were analyzed by X-ray powder diffraction （XRD）. Also, their surface morphologies were investigated by scanning electron microscopy （SEM）. In addition, the chemical composition of the coatings were analyzed by an energy dispersion spectroscopy （EDS） attached to SEM. The formation of the coating was studied with particular emphasis on the effects of the process parameters such as the initial pH values of the electrolyte, the current density, and the temperature. The results showed that the process parameters had no significant influence on the composition of the coatings, which was determined as HA. But the degree of preferential orientation of c-axis of HA was great influenced by them. The HA crystals preferentially grew along the c-axis when the initial pH was 6.00 at 55 ℃ with the current density of 0.5 mA· cm^-2. And the degree of preferential orientation implied a similar value to the natural enamel crystals.

关 键 词：电化学 牙釉质 羟基磷灰石(HA) 涂层 

分 类 号：O614[理学—无机化学]