纯镁表面负载中药提取物对复合涂层性能影响

在纯镁超声微弧氧化表面,采用电泳沉积方法引入壳聚糖作为中间层,并在壳聚糖表面浸提中药提取物。研究中药提取物对复合涂层的微观结构、磨损性能、耐蚀性和生物活性等的影响。结果表明：负载中药提取物能对超声微弧氧化表面实现封孔处理,负载中药提取物涂层具有适宜的表面状态,从而改善耐蚀性；负载中药提取物涂层为化学结合提高了涂层的结合力和抗磨损性能,并具有优异的体外生物活性。

Effect of Chinese Herbal Extract on Properties of Composite Coatings on Pure Magnesium

The chitosan interlayer was formed on ultrasonic micro-arc oxidation(UMAO) coating of pure magnesium by electrophoretic deposition technique, on which we employed immersion method to make coatings with chinese herbal extract. Influence of chinese herbal extract on microstructure, tribological properties, corrosion resistance and biological activity of the composite coatings was investigated. The results show that UMAO coating is sealed by coatings with chinese herbal extract. The corrosion resistance of the coatings with chinese herbal extract is increased with appropriate surface condition. The binding force and tribological properties of the coating with chinese herbal extract are increased under chemical binding. The coatings with chinese herbal extract also has shown better biological activity invitro.