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目的改善钛合金植入体的长期机械稳定性。方法通过溶胶凝胶工艺和浸渍提拉技术,以钛酸丁酯(TEOT)为前躯体,加入聚乙二醇(PEG)作为模板剂,在钛合金基片上制备了TiO2微纳图案化薄膜,通过AFM研究了PEG的加入量对薄膜表面微观形貌的影响,并利用光学接触角测量仪与UMT-2型摩擦磨损试验机对薄膜的浸润性及摩擦学性能进行了研究。结果当PEG浓度增至3.5g/100mL时,样品表面呈现出较为规则的平行排列的沟槽状结构;具有图案化结构的TiO2薄膜的耐磨性较未加入模板剂的TiO2溶胶凝胶薄膜有明显提高。结论可以通过控制模板剂的用量来实现对TiO2薄膜图案化特征的渐变控制,并证明了特定的图案化微观结构可以提高薄膜的抗磨损性能。
Objective To improve the long-term mechanical stability of titanium alloy implants. Methods TiO2 micro-nano patterned film was prepared on titanium alloy substrate by using sol-gel process and dipping and pulling technique with tetrabutyl titanate (TEOT) as precursor and polyethylene glycol (PEG) as templating agent. The effects of PEG loading on the surface morphology of the films were investigated by AFM. The wettability and tribological properties of films were studied by optical contact angle measurement and UMT-2 friction and wear testing machine. Results When the concentration of PEG increased to 3.5g / 100mL, the sample surface showed a regular arrangement of parallel groove-like structure; with a patterned structure of TiO2 film wear resistance than without the addition of template TiO2 sol-gel film has Significantly improved. Conclusion The control of the amount of template agent can realize the gradual control of the patterning characteristics of TiO2 films and demonstrate that the specific patterned microstructure can improve the anti-wear properties of the films.