壳聚糖/SrHAP复合涂层的制备及其FTIR特征分析  

Preparation of Chitosan/Strontium-Substituted Hydroxyapatite Films on Titanium and Its FTIR Characteristics

作　　者：黄勇[1,3] 韩曙光[1] 丁琼琼[1] 严雅静[1] 庞小峰[1,2] 

机构地区：[1]电子科技大学,生物物理与生物电子技术四川省重点实验室,四川成都610054 [2]中国科学院国际材料物理中心,辽宁沈阳110015 [3]河北北方学院医学检验学院,河北张家口075000

出　　处：《光谱学与光谱分析》2013年第9期2379-2382,共4页Spectroscopy and Spectral Analysis

基　　金：国家重大基础研究发展规划(973计划)项目(2011CB503700);电子科技大学优秀博士生学术支持计划项目资助

摘　　要：在含有Sr2+,Ca2+,PO34-和壳聚糖(CHI)的电沉积液中,用恒电流沉积法,在医用纯钛(Ti)表面上得到壳聚糖/掺锶羟基磷灰石(SrHAP)复合涂层。采用扫描电镜(SEM)、能量弥散X射线谱(EDS)、X射线衍射(XRD)对涂层进行检测,用傅里叶变换红外光谱(FTIR)考察了壳聚糖和锶离子的掺杂对HAP涂层构象和生物活性的影响。结果表明:锶部分取代磷灰石中的钙,表面形貌由疏松的针状变为较致密的片状。FTIR分析表明,涂层中出现了典型的amideⅠ和amideⅡ的壳聚糖振动峰,则CHI与SrHAP杂化良好;模拟生理液浸泡后表面覆盖有球状类骨磷灰石,则涂层具备较好的生物活性。塔菲尔测试表明,复合涂层使得Ti表面的抗生理腐蚀性显著提高。Chitosan/strontium-substituted hydroxyapatite（CHI/SrHAP）coatings were prepared on titanium substrate by electrochemical deposition technique containing Sr^2＋,Ca^2＋,PO4^3-and Chitosan.The as-prepared coatings were examined by scanning electron microscope（SEM）,energy-dispersive X-ray spectroscopy（EDS）,Fourier transform infrared spectroscopy（FTIR） and X-ray diffraction（XRD）tests.The results indicate that the CHI/SrHAP coatings take the morphology of flake-like rather than the needle-like crystal,and the composite coating becomes more compact.The FTIR test indicates that the typical vibration absorption peaks of chitosan（amideⅠand amideⅡ）emerged,simulated body fluid immersion test proved that the CHI/SrHAP coatings had induced carbonate-apatite formation,indicating that the composite coating possesses excellent biocompatibility.In the electrochemical corrosion testing,that the CHI/SrHAP coatings showed stronger corrosion resistance than pure Ti.

关 键 词：电沉积 SrHAP 壳聚糖 复合涂层 FTIR 

分 类 号：TB333[一般工业技术—材料科学与工程] O646[理学—物理化学]