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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。
In order to give the biological activity and antibacterial property of the surface coating of dental implants, the advantages of acid etching, micro-arc oxidation, alkali treatment and electroless copper plating were given. Copper-bearing biological coatings were prepared on the surface of TA2 titanium. The effect of copper plating time and temperature on the copper loading, surface morphology, adhesion and antibacterial property of the coating was investigated. The results show that the micro-nano structure with uniform surface corrosion can be obtained by etching the titanium substrate, which provides more space for the growth of the micro-arc oxidation. Titanium ultrasonic micro-arc oxidation coating activates the Ti O2 layer, Copper; When the electroless copper plating is carried out by the porous coating, the content of copper in the coating increases with the increase of the temperature and the time of the electroless copper plating, while the bonding strength of the coating decreases with the increase of electroless copper plating time; Under the condition of electroless copper plating for 3 min, the antibacterial rate of the coating is 98.3%, the copper content is suitable on the surface, and the formation of copper-destroying biofilm changes the microenvironment of bacterial adhesion, which makes the bacteria difficult to grow normally and the antibacterial effect is achieved.