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New specific metal-silica biocomposites for medical implants

机译：用于医疗植入物的新型特殊金属二氧化硅生物复合材料

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All metallic biomaterials contain elements which may cause metallosis or corrosion, and their surfaces may not promote colonization by cells of the surrounding tissue. In this paper, the authors describe new materials for coating on a commercially available alloy that act as bio-functional as well as a better protective coating for medical implants. The authors have chosen the stainless steel 316L for deposition of silica doped thin films prepared by sol-gel method. Two different silica precursors have been used: tetramethylorthosilicate and tetraethylorthosilicate and two others with halides substituents: 3-chloropropyl-trimethoxysilane and fluorotriethoxy-silane. Ethanol was used as solvent and hydrochloric acid as catalyst. Cleaned metallic substrate were dip-coated by the sols, then dried at room temperature in air and stabilized at a temperature of 50℃, 300℃, and 500℃. The materials were variously examined: structurally (scanning electron microscopy, roughness measurements), physic-chemically (attenuated total reflectance-fourier transform infrared spectroscopy), and mechanically (four-point bending test). Tests results indicate that the sol-gel produced materials exhibit continuous coatings that can improve the surfaces of metallic biomaterials.
机译：所有金属生物材料均包含可能导致金属化或腐蚀的元素，其表面可能不会促进周围组织细胞的定殖。在本文中，作者描述了可在市场上买到的具有生物功能的合金上涂层的新材料，以及用于医疗植入物的更好的保护涂层。作者选择了316L不锈钢来沉积通过溶胶凝胶法制备的二氧化硅掺杂薄膜。已经使用了两种不同的二氧化硅前体：原硅酸四甲酯和原硅酸四乙酯以及具有卤化物取代基的另外两种：3-氯丙基-三甲氧基硅烷和氟代三乙氧基-硅烷。乙醇用作溶剂，盐酸用作催化剂。将清洁过的金属基材用溶胶浸涂，然后在室温下在空气中干燥，并在50℃，300℃和500℃的温度下稳定。对材料进行了各种检查：结构（扫描电子显微镜，粗糙度测量），物理化学（衰减全反射-傅立叶变换红外光谱）和机械（四点弯曲测试）。测试结果表明，溶胶-凝胶生产的材料具有连续的涂层，可以改善金属生物材料的表面。

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