OTS修饰活性钛表面及电化学沉积钙磷涂层的研究

发布时间：2019-05-23 05:11

【摘要】：通过Piranha溶液(体积比H2SO4:H2O2=7:3)处理在医用钛表面形成纳米网状结构的氧化层。利用自组装技术在材料表面接枝十八烷基三氯硅烷(OTS)膜,对OTS膜层进行紫外光照,探讨材料亲疏水表面对电化学沉积钙磷涂层的影响。通过傅里叶变换红外谱仪(FTIR)、接触角测定仪、X射线衍射仪(XRD)、场发射扫描电镜(FE-SEM)对OTS膜和钙磷涂层进行了表征和探讨。结果表明活性钛表面OTS的水接触角(109.8±2.1)°经UV辐照后降低到(63.4±1.8)°,其表面能由37.50 m J·m-2增加到45.18 m J·m-2。通过电化学方法使钙磷沉积在活性钛、不同的Ti-OTS亲疏水表面。研究结果表明经UV辐照120 min后的Ti-OTS表面钙磷涂层更均匀有序,有望能提高植入材料的稳定性。
[Abstract]:The nano-reticulated oxide layer was formed on the surface of medical titanium by Piranha solution (volume ratio H2SO4:H2O2=7:3). Octadecyl trichlorosilane (OTS) film was grafted on the surface of the material by self-assembly technique, and the OTS film was irradiated by ultraviolet light. The effect of hydrophilic surface on electrochemical deposition of calcium and phosphorus coating was discussed. The OTS film and calcium and phosphorus coating were characterized and discussed by Fourier transform infrared spectrometer (FTIR), contact angle tester and X-ray diffractometer (XRD), field emission scanning electron microscope (FE-SEM). The results show that the water contact angle of OTS on active titanium surface decreases to (63.4 卤1.8) 掳after UV irradiation, and the surface energy increases from 37.50 MJ 路m ~ (- 2) to 45.18 MJ 路m ~ (- 2). Calcium and phosphorus were deposited on the hydrophobic surface of active titanium and different Ti-OTS by electrochemical method. The results show that the calcium and phosphorus coatings on the surface of Ti-OTS irradiated by UV for 120 min are more uniform and orderly, which is expected to improve the stability of the implanted materials.
【作者单位】：广东工业;华南理工大学;
【基金】：国家重点基础研究发展计划“973”计划(2012CB619100,2011CB606204) 国家自然科学基金项目(51372087,51072057,51172073,51072055)
【分类号】：TG174.4

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