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Structure and composition characterization of biocomposites filled with sol–gel bioglasses from the CaO–SiO 2 –P 2 O 5 –Ag 2 O systems
Journal of Rubber Research ( IF 1.3 ) Pub Date : 2021-01-12 , DOI: 10.1007/s42464-020-00075-3
Abdullah G. Al-Sehemi , Ahmed A. Al-Ghamdi , Nikolay T. Dishovsky , Lachezar Radev , Irena Mihailova , Petrunka A. Malinova , Nikolay T. Atanasov , Gabriela L. Atanasova

Lately silver has become extremely important among alloying additives used to produce glassy materials with specific tailored properties. The aim of the study is to characterize bioactive glasses belonging to the CaO–SiO2–P2O5–Ag2O system by SEM and EDX methods, as well as biocomposites based on natural rubber containing those fillers. The focus is on the influence that silver oxide and the mechanism of its effect have upon the properties of glasses and biocomposites. The results show that silver particles serve as crystallization centers for apatite formation in sol–gel glasses what leads to a serious change in the morphology and size of crystals and consequently in glass microstructure. Particles in the form of plates have been identified. This is an indication of silver-stimulated crystalline structure. A relation between the hydroxylapatite plaque and the concentration of silver particles has been found. The influence of silver oxide is expressed in noticeable changes in the adsorption texture properties of the glasses. In the composites, the aggregation of the filler particles has been observed and their size increases in the presence of silver oxide. The hydroxylapatite formed as a stand-alone phase in the sol–gel glass and acting as a filler has the most important role in tailoring the composite characteristics.



中文翻译:

CaO-SiO 2 -P 2 O 5 -Ag 2 O系统中填充有溶胶-凝胶生物玻璃的生物复合材料的结构和成分表征

最近,在用于生产具有特定定制性能的玻璃状材料的合金添加剂中,银已变得极为重要。研究的目的是鉴定属于CaO–SiO 2 –P 2 O 5 –Ag 2的生物活性玻璃。通过SEM和EDX方法获得O系统,以及包含这些填料的基于天然橡胶的生物复合材料。重点是氧化银及其作用机理对玻璃和生物复合材料性能的影响。结果表明,银颗粒是溶胶-凝胶玻璃中磷灰石形成的结晶中心,这导致晶体的形态和尺寸发生严重变化,进而导致玻璃的微观结构发生严重变化。已经鉴定出板状的颗粒。这表明银刺激了晶体结构。已经发现羟基磷灰石斑块与银颗粒的浓度之间的关系。氧化银的影响表现为玻璃的吸附质构性质发生明显变化。在复合材料中 已经观察到填料颗粒的聚集,并且在氧化银存在下它们的尺寸增加。羟基磷灰石在溶胶-凝胶玻璃中形成为独立相,并充当填充剂,在调整复合材料特性方面发挥着最重要的作用。

更新日期:2021-01-13
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