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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Dissolution behavior of the bioactive glass S53P4 when sodium is replaced by potassium, and calcium with magnesium or strontium
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Dissolution behavior of the bioactive glass S53P4 when sodium is replaced by potassium, and calcium with magnesium or strontium

机译：钠替换为钾，钙替换为镁或锶时，生物活性玻璃S53P4的溶解行为

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摘要

The initial dissolution behavior of glasses based on bioactive glass S53P4 was studied with a dynamic measurement setup in-a Tris-buffered solution. The glass composition was modified systematically on a molar basis by replacing sodium oxide with potassium oxide (0-100% K) and calcium oxide with magnesium (0-18% Mg) or strontium oxide (0-100% Sr). The concentrations of the ions dissolving from the glasses were measured continuously on-line in the fluid flow for 15 to 25 min using an inductively coupled plasma emission optical spectrometer. This method enabled attainment of detailed information on the initial dissolution mechanisms without the, for bioactive glasses typical, interference of apatite layer formation. The results showed that initial dissolutions of sodium and potassium were markedly higher from the mixed alkali oxide glasses than from the compositions containing only one alkali oxide. Introducing MgO in S53P4 caused a minor decrease in the dissolution rates of all ions. The glass containing 3 mol% of MgO showed the best chemical durability. In contrast, replacing CaO gradually with Sr increased the dissolution rates of all ions. The glasses with the highest replacement of CaO with Sr showed rapid release of both Sr and Na ions. The results corroborate the overall knowledge of glass durability and can be utilized to design bioactive glasses with controlled ion release rate for tissue engineering applications. (C) 2015 Elsevier B.V. All rights reserved.
机译：使用Tris缓冲溶液中的动态测量装置研究了基于生物活性玻璃S53P4的玻璃的初始溶解行为。通过用氧化钾（0-100％K）代替氧化钠和用镁（0-18％Mg）或氧化锶（0-100％Sr）代替氧化钙，在摩尔基础上对玻璃组成进行系统地改性。使用感应耦合等离子体发射光谱仪，在流中连续在线测量从玻璃中溶解的离子的浓度，持续15到25分钟。对于典型的生物活性玻璃，该方法能够获得有关初始溶解机理的详细信息，而不会干扰磷灰石层的形成。结果表明，与仅含一种碱金属氧化物的组合物相比，混合碱金属氧化物玻璃中钠和钾的初始溶解度明显更高。在S53P4中引入MgO会导致所有离子的溶解速率略有下降。含有3摩尔％MgO的玻璃具有最佳的化学耐久性。相反，逐渐用Sr代替CaO会增加所有离子的溶解速度。用Sr取代CaO的玻璃最高，显示Sr和Na离子均快速释放。结果证实了玻璃耐久性的整体知识，可用于设计组织工程应用中具有受控离子释放速率的生物活性玻璃。 （C）2015 Elsevier B.V.保留所有权利。

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