飞秒激光织构钛合金表面形貌及润湿性研究  

Morphology and Wettability of Titanium Alloy Surface Textured by Femtosecond Laser

作　　者：肖蒲庐 陈观华 陈宇 张翔 袁孝 Xiao Pulu;Chen Guanhua;Chen Yu;Zhang Xiang;Yuan Xiao(School of Optoelectronic Science and Engineering,Soochow University,Suzhou 215006,Jiangsu,China;Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215006,Jiangsu,China;Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province,Suzhou 215006,Jiangsu,China;Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University,Suzhou 215006,Jiangsu,China;Amplitude Shanghai Laser Technology Co.,Ltd.,Suzhou 215123,Jiangsu,China)

机构地区：[1]苏州大学光电科学与工程学院,江苏苏州215006 [2]苏州大学苏州纳米科技协同创新中心,江苏苏州215006 [3]江苏省先进光学制造技术重点实验室,江苏苏州215006 [4]苏州大学教育部现代光学技术重点实验室,江苏苏州215006 [5]奥徒(上海)激光技术有限公司,江苏苏州215123

出　　处：《中国激光》2023年第16期167-177,共11页Chinese Journal of Lasers

基　　金：国家自然科学基金(61775153,U1930106);江苏高校优势学科建设工程资助项目(PAPD)。

摘　　要：通过改变飞秒激光的能量密度和扫描次数,分别采用90°和60°两种激光交叉线扫描方式,在钛合金表面制备了一系列方形和菱形微结构,系统地研究了飞秒激光参数对表面形貌和润湿性的影响。利用X射线光电子能谱测量分析了激光织构前后的表面化学成分变化。结果表明:表面结构的轮廓形貌更加依赖于激光的能量密度,而扫描次数主要影响结构的特征尺寸。不同的飞秒激光参数下获得的织构钛合金表面表现出不同程度的亲水性提升。较高的激光能量密度和扫描次数有利于增大钛合金表面的粗糙度,同时导致大量的金属氧化物富集,从而促进了液滴的浸润。Objective In recent decades,the global market demand for dental and orthopedic implants has grown steadily owing to an aging population,an increase in bad habits,and frequent accidents.Titanium alloys have a low specific gravity,high corrosion resistance,better compressive strength,and fracture toughness than other implant materials and are currently widely used in biomedical implant engineering.However,owing to the biological inertia of titanium alloys,long-term implantation may induce inflammation around the implant and affect its lifespan.To realize a tight connection between the implant and the surrounding tissue of the human body and form a stable osseointegration interface,the modification of the implant surface is very important.Among these surface properties,wettability mainly affects the type,quantity,and conformation of proteins deposited on the implant surface,and subsequently affects the cell response at the material interface.With deeper research on the surface modification of laser-irradiated materials,the coupling relationship between various surface properties after modification becomes complicated when considering the functional effect of hydrophilicity alone.However,the differences in the surface morphology make the relationship between wettability and cell biological behavior inconclusive.Therefore,it is necessary to systematically evaluate the wettability of surfaces with different structural features after femtosecond-laser texturing.The scanning path strategy and structural changes caused by laser parameters proposed in this study provide ideas for the design and construction of biomedical implant surface structures.Methods Ti6Al4V sheets with a thickness of 0.5 mm are prepared for the experimental study.Before processing,the samples are polished using a abrasive wheel,followed by ultrasonic cleaning in deionized water,acetone,and absolute ethanol for 15 min.Surface texturing is performed using a ytterbium fiber laser with a central wavelength of 1030 nm and a pulse duration of 300 fs.Sixtee

关 键 词：激光技术 飞秒激光 表面织构 钛合金 亲水性 

分 类 号：TN249[电子电信—物理电子学]