Corrosion resistance and biocompatibility of SrHAp/ZnO composite implant coating on titanium
Corrosion resistance and biocompatibility of SrHAp/ZnO composite implant coating on titanium
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钛表面SrHAp/ZnO复合种植体涂层的耐腐蚀性能及生物相容性
DOI：
10.1016/j.apsusc.2013.11.082
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发表时间：
2014-01-30
影响因子：
6.7
通讯作者：
Wang, Deshun
中科院分区：
文献类型：
--
作者：
Huang, Yong;Zeng, Hongjuan;Wang, Deshun
研究了钛表面电沉积含氧化锌和掺锶羟基磷灰石(SrHAp/ZnO)涂层的耐蚀性。研究了涂层的组织、物相组成和耐蚀性。结果表明，Sr2+和ZnO的加入显著提高了HAP涂层的致密度，即制备的涂层的孔隙率明显低于原始HAP涂层。SrHAp/ZnO涂层致密均匀，呈絮状磷灰石结构。SrHAp/ZnO为碳酸化的缺钙羟基磷灰石，涂层中Sr2+和ZnO均匀分布。复合涂层厚度近10微米，界面无分层或裂纹。结合强度测试表明，SrHAp/ZnO涂层的结合强度比HAP涂层的结合强度有更大的提高。SrHAp/ZnO包覆钛的腐蚀速率低于纯HAp包覆钛，说明复合涂层具有保护作用。成骨细胞实验表明，SrHAp/ZnO复合涂层大大提高了钛基材的体外生物相容性。(C)2013爱思唯尔B.V.保留所有权利。
The corrosion resistance of electrodeposited ZnO containing and strontium doped hydroxyapatite (SrHAp/ZnO) coating on titanium (Ti) substrate was investigated. The microstructure, phase composition and corrosion resistance of the coating were studied. The results reveal that Sr2+ and ZnO incorporation markedly increased the density of HAp coating, i.e. the fabricated coating had significantly lower porosity than the original HAp coating. The SrHAp/ZnO coating was dense and uniform, with a flocculent morphological structure of apatite. The SrHAp/ZnO crystals were carbonated calcium-deficient hydroxyapatite, and Sr2+ and ZnO were homogeneously distributed in the coating. The thickness of the composite coating was almost 10 mu m without delamination or cracks at the interface. Bond strength test revealed that the adhesion of the SrHAp/ZnO coating was more enhanced than that of the HAp coating. The SrHAp/ZnO-coated Ti had a lower corrosion rate than the pure HAp-coated sample, which suggests the protective characteristic of the composite coating. Osteoblast cellular tests demonstrated that the SrHAp/ZnO composite coating greatly enhanced the in vitro biocompatibility of the Ti substrate. (C) 2013 Elsevier B.V. All rights reserved.