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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Preparation and characterization of sol-gel bioactive glass coating for improvement of biocompatibility of human body implant
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Preparation and characterization of sol-gel bioactive glass coating for improvement of biocompatibility of human body implant

机译：用于改善人体植入物生物相容性的溶胶-凝胶生物活性玻璃涂层的制备与表征

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摘要

The aim of this work was preparation, development and characterization of bioactive glass coating by sol-gel technique for improvement of biocompatibility of 316L stainless steel implant used in dentistry and orthopaedic surgery. Bioglass powder was made by sol-gel technique and thermal properties of the prepared powder were studied using differential thermal analysis (DTA). The prepared bioglass powder was immersed in the simulated body fluid (SBF) solution. Fourier transform infrared spectroscopy (FTIR) was utilized to recognize and confirm of the formation of apatite layer on prepared bioglass powder. Bioactive bioglass coating was performed on 316L stainless steel (SS) substrate by the sol-gel technique. Structural characterization techniques including XRD, SEM and EDX were used to investigate the microstructure and morphology of the coating. Electrochemical potentiodynamic polarization tests were performed in two different types of physiological solutions at 37℃ in order to determine and compare the corrosion behavior of the bioglass coated SS and uncoated specimens as an indication of biocompatibility. The formation of apatite layer confirmed the bioactivity of the bioglass powder and tests revealed that all the films signs of bioactivity. It was also found that at sintering temperatures above 900 ℃, crystalline phase Ca_2SiO_4 was formed. Crack-free and homogeneous bioglass coatings were obtained with no observable defects. The bioglass coating also improved corrosion resistance of the 316L SS substrates such as the corrosion current density of coated samples in comparison with pristine samples was decreased. It was concluded that the sol-gel bioglass coating can improve the corrosion behavior of dental and orthopedic metallic implants and two goals including improvement of biocompatibility and bone osteointegration can be obtained simultaneously.
机译：这项工作的目的是通过溶胶-凝胶技术制备，开发和表征生物活性玻璃涂层，以改善用于牙科和整形外科的316L不锈钢植入物的生物相容性。通过溶胶-凝胶技术制备生物玻璃粉末，并使用差热分析（​​DTA）研究了制备的粉末的热性能。将制备的生物玻璃粉末浸入模拟体液（SBF）溶液中。利用傅里叶变换红外光谱（FTIR）识别并确认在制备的生物玻璃粉末上形成的磷灰石层。通过溶胶-凝胶技术在316L不锈钢（SS）基材上进行生物活性生物玻璃涂层。使用XRD，SEM和EDX等结构表征技术研究了涂层的微观结构和形态。在两种不同类型的生理溶液中于37℃进行了电化学电位极化测试，目的是确定并比较生物玻璃涂层的SS和未涂层样品的腐蚀行为，以此作为生物相容性的指标。磷灰石层的形成证实了生物玻璃粉末的生物活性，并且测试表明所有膜都具有生物活性的迹象。还发现在900℃以上的烧结温度下，会形成结晶相Ca_2SiO_4。获得无裂纹且均匀的生物玻璃涂层，没有可观察到的缺陷。生物玻璃涂层还改善了316L SS基材的耐腐蚀性，例如与原始样品相比，涂层样品的腐蚀电流密度降低了。结论是，溶胶-凝胶生物玻璃涂层可以改善牙科和骨科金属植入物的腐蚀行为，同时可以达到改善生物相容性和骨整合的两个目标。

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