OTS功能化钛表面电化学可控沉积纳米钙磷涂层的研究

Tunable Preparation of CaP Coatings on OTS Functionalized Titanium Surface by Electrochemical Deposition

摘要:

利用自组装技术在材料表面接枝十八烷基三氯硅烷（OTS）膜，并进行紫外光照，改变材料表面疏水性质，探讨不同电化学沉积条件对钙磷涂层微观形貌及结构的影响。电化学方法可使钙磷涂层在紫外辐射下的OTS功能化钛表面可控沉积。通过X射线衍射仪（XRD）、场发射扫描电镜（FE-SEM）、透射电子显微镜（TEM）对钙磷涂层进行了表征，利用Scherrer公式对不同沉积条件下钙磷晶粒尺寸进行了探讨。结果表明不同参数条件下钙磷涂层的微观形貌有差别，且其晶粒大小不一，尺寸范围在12.46nm到190.1nm之间。研究表明OTS功能化钛表面能够可控地制备均匀有序钙磷涂层，有望能提高植入材料的生物相容性。

Abstract:

Octadecyltrichlorosilane (OTS) was grafted on titanium using self-assembly technique, after UV irradiation, its hydrophobic nature was changing. The calcium phosphate coatings was tunablely prepared by electrochemical deposition on functionalized titanium surface with different experiment conditions. The correlative structure and morphology of CaP coatings on titanium were characterized by X-ray diffractometer (XRD), field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) under the preparation parameters. Its grain size under different conditions was calculated by Scherrer formula. The results indicated that the morphology of CaP coatings under different conditions were significant difference, and the grain sizes were ranged 12.46nm from 190.1nm. The study demonstrated that OTS functionalized titanium surface could be a controllable preparation of uniform and orderly nano CaP coatings, which is expected to improve the biocompatibility of implant materials.