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首页> 外文OA文献 >Structural characterization and physical properties of P2O5–CaO–Na2O–TiO2 glasses by Fourier transform infrared, Raman and solid-state magic angle spinning nuclear magnetic resonance spectroscopies
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Structural characterization and physical properties of P2O5–CaO–Na2O–TiO2 glasses by Fourier transform infrared, Raman and solid-state magic angle spinning nuclear magnetic resonance spectroscopies

机译：傅里叶变换红外，拉曼和固态幻角旋转核磁共振光谱法表征P2O5–CaO–Na2O–TiO2玻璃的结构表征和物理性质

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Phosphate-based glasses have been investigated for tissue engineering applications. This study details the properties and structural characterization of titanium ultra-phosphate glasses in the 55(P2O5)–30(CaO)–(25 − x)(Na2O)–x(TiO2) (0 ⩽ x ⩽ 5) system, which have been prepared via melt-quenching techniques. Structural characterization was achieved by a combination of X-ray diffraction (XRD), and solid-state nuclear magnetic resonance, Raman and Fourier transform infrared spectroscopies. Physical properties were also investigated using density, degradation and ion release studies; additionally, differential thermal analysis was used for thermal analysis of these glasses. The results show that with the addition of TiO2 the density and glass transition temperature increased whereas the degradation and ion release properties are decreased. From XRD data, TiP2O7 and CaP2O6 were detected in 3 and 5 mol.% TiO2-containing glasses. Magic angle spinning nuclear magnetic resonance results confirmed that as TiO2 is incorporated into the glass; the amount of Q3 increases as the amount of Q2 consequently decreases, indicating increasing polymerization of the phosphate network. Spectroscopy results also showed that the local structure of glasses changes with increasing TiO2 content. As TiO2 is incorporated into the glass, the phosphate connectivity increases, indicating that the addition of TiO2 content correlates unequivocally with an increase in glass stability.
机译：已经研究了基于磷酸盐的玻璃用于组织工程应用。这项研究详细介绍了55（P2O5）–30（CaO）–（25 − x）（Na2O）–x（TiO2）（0⩽x⩽5）体系中的超磷酸盐钛玻璃的性质和结构特征。通过熔融淬火技术制备。通过X射线衍射（XRD）和固态核磁共振，拉曼光谱和傅立叶变换红外光谱学的结合来实现结构表征。还使用密度，降解和离子释放研究来研究物理性质；另外，差热分析被用于这些玻璃的热分析。结果表明，随着TiO2的加入，密度和玻璃化转变温度增加，而降解和离子释放性能下降。根据XRD数据，在3和5 mol％的TiO2玻璃中检测到TiP2O7和CaP2O6。幻角旋转核磁共振结果证实，将TiO2掺入玻璃中。 Q3的量随着Q2的量的减少而增加，表明磷酸酯网络的聚合增加。光谱结果还表明，玻璃的局部结构随TiO2含量的增加而变化。当将TiO2掺入玻璃中时，磷酸盐的连接性增加，这表明TiO2含量的增加与玻璃稳定性的增加无疑相关。

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