钛表面压电BaTiO3涂层的形貌、晶相控制合成

Morphology and crystal phase control of piezoelectric BaTiO3 coating on titanium surface

摘要:

加速和改善骨结合过程是口腔种植领域的研究热点,电刺激成骨是其中的研究方向之一,但外源性电刺激目前还存在很多缺陷。鉴于骨本身具有压电特性,如能在钛种植体表面制备压电材料涂层,从而产生内源性电刺激来促进成骨就具有重要研究意义。钛酸钡作为一种环境友好的无铅压电材料,在四方相具备压电效应,生物相容性良好,负荷条件下可以促进成骨。本研究首先利用阳极氧化技术在钛种植体表面制备了形貌和结构优化的二氧化钛纳米管涂层,进而利用水热反应将二氧化钛纳米管涂层转化为钛酸钡涂层,通过优化实验参数并设置极限浓度探索出具有压电效应的四方相钛酸钡涂层的合成条件,并进行了表面形貌、晶相等的表征和分析,结合有限元分析模拟计算验证涂层颗粒压电势，期望为种植体表面改性提供新的思路和方法。

Abstract:

Accelerating and improving the process of osseointegration is a research hotspot of oral implantology, and electrical stimulation of osteogenesis is one of the research directions. In view of the bone"s piezoelectric properties and the defects of exogenous electrical stimulation, the application of piezoelectric materials to generate endogenous electrical stimulation to promote osteogenesis is of great significance. As an environmental-friendly lead-free piezoelectric material, barium titanate has a piezoelectric effect in the tetragonal phase. Especially it has good biocompatibility and can promote bone formation under load conditions. Here we used anodic oxidation technology and hydrothermal reaction to construct a barium titanate piezoelectric coating on the titanium surface. By optimizing the experimental parameters and setting the limit concentration, we explored the synthesis conditions of the tetragonal barium titanate coating.Meanwhile, the piezoelectric potential of coating particles was verified by finite element simulation. By modifying the surface of the dental implant, we hope to provide a new method to promote implant osseointegration.