Bioactive Treatment of Metal Surface by Hydrothermal-Electrochemical Method

水热电化学法对金属表面进行生物活性处理

基本信息

批准号：
09557159
负责人：
BAN Seiji
金额：
$ 7.55万
依托单位：
Aichi-Gakuin University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09557159/
关键词：
coating hydroxyapatite carbonate apatite dental implant calcium phosphate hydrothermal-electrochemical synsthesis

项目摘要

The present thesis deals with the surface modification by the hydrothermal-electrochemical deposition of bioactive layer on the composite designed for biological application. In Heisei 9, hydroxyapatite crystals were formed on pure titanium plates using the hydrothermal-electrochemical method in an autoclave with two electrodes. The current was a constant at 12.5 mA/cm^2 and the electrolyte dissolving NaCl, K_2HPO_4, CaCl_2 2H_2O, trishydroxyaminomethane, and hydrochloric acid was maintained at 80ﾟC - 200ﾟC.The counter electrode was platinum plate, 20x20x0.5 mm, and the working electrodes were pure titanium (JIS 1). After loading of the constant current for 1 hr, the deposits on the electrodes were characterized by X-ray diffractometry, Fourier transform infrared spectroscopy, field emission type scanning electron microscopy, and energy dispersive X-ray spectroscopy. All the deposits were needle-like crystal of hydroxyapatite, and both width and length of the needles increased with the electrolyte temperature. Most of the needle-like crystals grew up perpendicular to the substrate below 150ﾟC, whereas orintation angle of the needles against the substrate were more varied above it.In Heisei 10, mechanism of the formation of needle-like apatite crystal by electrochemical deposition was focused in the research. The electrolyte was heated at 100, 150 and 200ﾟC in an autoclave and the current was maintained at 12.5 mA/cm^2 for 10 - 120 min. Weigth gain, corresponding to deposited amount, linearly increased with square root of loading time and the slope at 150ﾟC was highest. The lengths of one side of the hexagonal crystals linearly increased with square root of loading time and the slope at 200ﾟC was highest, 1.48 mu m/min^<1/2>.

本论文研究了通过水热电化学沉积生物活性层对生物应用复合材料进行表面改性。在 Heisei 9 中，使用水热电化学方法在具有两个电极的高压釜中在纯钛板上形成羟基磷灰石晶体。电流恒定为12.5 mA/cm^2，电解质溶解NaCl、K_2HPO_4、CaCl_2 2H_2O、三羟基氨基甲烷和盐酸保持在80°C - 200°C。对电极为铂板，20x20x0.5 mm，工作电极为纯钛（JIS 1）。加载恒定电流1次后。小时，电极上的沉积物通过 X 射线衍射、傅里叶变换红外光谱进行表征，场发射型扫描电镜和能谱分析表明沉积物均为羟基磷灰石针状晶体，且针状晶体的宽度和长度均随电解液温度的升高而增加。低于150°C时，针相对于基底的定向角度变化更大。平成10年，针状结构的形成机制研究重点是通过电化学沉积法制备磷灰石晶体，将电解液在高压釜中加热至 100°C、150°C 和 200°C，电流保持在 12.5 mA/cm^2 10 - 120 分钟，这与沉积的重量增益相对应。量随加载时间的平方根线性增加，且150°C时斜率最大。六方晶随加载时间的平方根线性增加，200℃时斜率最高，为1.48μm/min^<1/2>。