纯钛超声微弧氧化-化学镀铜涂层的制备及抗菌性

Preparation of Pure Titanium Ultrasonic Micro-Arc Oxidation-Chemical Copper Plating Coating and Analysis of Its Antimicrobial Properly

为了赋予纯钛口腔种植体表面涂层生物活性及抗菌性,发挥酸蚀、微弧氧化技术、碱处理及化学镀铜技术各自优势,在TA2纯钛表面制备载铜生物涂层。研究了镀铜时间和温度对载铜含量及涂层表面形貌、结合力和抗菌性的影响。结果表明:钛基体酸蚀获得表面腐蚀均匀的微纳米结构,为超声微弧氧化提供了更多的氧化物生长空间;钛超声微弧氧化涂层碱处理使陶瓷层Ti O2活化,并利于载铜;利用多孔涂层进行化学镀铜时,涂层中铜元素含量随化学镀铜温度的升高和时间增长而增大,而涂层结合力随着化学镀铜时间增长而下降;50℃下化学镀铜3 min时,涂层抗菌率为98.3%,表面铜含量适宜,载铜破坏生物膜的形成使细菌黏附的微环境发生改变,造成细菌难以正常生长,实现了抗菌效果。

Copper- loaded biological coatings were prepared on the surface of TA2 pure titanium.Subsequently,the influences of copper plating time and temperature on the copper content,surface morphology,adhesion strength and antimicrobial properties of the coating were studied.Results showed that Ti substrate obtained a uniform surface with micro-nano corrosion structure by acid- etching,providing more space for the oxide growth during ultrasound micro- arc oxidation.After ultrasonic micro- arc oxidation and coating alkali treatment,the ceramic layer TiO_2 was activated,which was advantageous for loading copper,and then the porous coatings were treated by chemical copper plating.The copper content of the coating was relevant to the plating temperature and processing time,but the adhesion of the coating declined.When copper plating was executed for 3 min at lower than 50℃,the anti-bacterial efficiency of coating was 98.3%,and the copper content on the surface was appropriate.The copper loading on coating destroyed biofilm formation,and changed the micro- environment of bacterial adherent,which inhibited normal growth of the bacteria and accomplished antibacterial effects.