硅酸盐学报2008，Vol.36Issue(9)：1231-1235,5.
预钙化加速类骨磷灰石在镍钛合金表面生长的电化学阻抗谱
ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY OF ACCELERATED BONE-LIKE APATITE GROWTH ON NICKEL AND TITANIUM ALLOY BY PRE-CALCIFICATION
摘要
Abstract
In order to improve its biocompatibility, a biomimetic process that treats the NiTi alloy with acid and alkali separately, and then in a simulated body fluid (SBF) was employed to deposit a bone-like apatite coating on a NiTi surface. Effect of pre-calciflcation on accelerated apatite growth on the bioactive NiTi in the SBF was investigated using an electrochemical impedance spectroscopy (EIS). The electrical equivalent circuit based on a two-layer model was proposed. The results show that bone-like apatite is con-tinuously formed on chemically treated NiTi with increasing of immersion time in the SBF. After immersion in the SBF for 3 d, the surface of chemically treated NiTi with pre-calcification is covered with a high density of compact and uniform granules of bone-like apatite, while imperfect coating is observed on the sample surface without pre-calcification. The resistance of the apatite layer on the sample with pre-calcification is obviously higher than the one of the sample without pre-calcification, which indicates the bone-like apatite on chemically treated NiTi is promoted by the pre-calcification process.关键词
类骨磷灰石涂层/镍钛合金/加速生长/预钙化/电化学阻抗谱Key words
bone-like apatite coating/nickel and titanium alloy/accelerated growth/pre-calcification/electrochemical impedancespectroscopy分类
化学化工引用本文复制引用
陈民芳,崔忠波,由臣,杨贤金,崔振铎..预钙化加速类骨磷灰石在镍钛合金表面生长的电化学阻抗谱[J].硅酸盐学报,2008,36(9):1231-1235,5.基金项目
国家自然科学基金.(50471048) （50471048）
天津市教委科技计划(20041018)资助项目. （20041018）
