Yttrium doped phosphate-based glasses: structural and degradation analyses

Q1 Materials Science

Biomedical Glasses Pub Date : 2020-01-01 DOI:10.1515/bglass-2020-0004

A. Arafat, Sabrin A. Samad, J. Titman, A. Lewis, E. Barney, I. Ahmed

{"title":"Yttrium doped phosphate-based glasses: structural and degradation analyses","authors":"A. Arafat, Sabrin A. Samad, J. Titman, A. Lewis, E. Barney, I. Ahmed","doi":"10.1515/bglass-2020-0004","DOIUrl":null,"url":null,"abstract":"Abstract This study investigates the role of yttrium in phosphate-based glasses in the system 45(P2O5)–25(CaO)– (30-x)(Na2O)–x(Y2O3) (0≤x≤5) prepared via melt quenching and focuses on their structural characterisation and degradation properties. The structural analyses were performed using a combination of solid-state nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). 31P NMR analysis showed that depolymerisation of the phosphate network occurred which increased with Y2O3 content as metaphosphate units (Q2) decreased with subsequent increase in pyrophosphate species (Q1). The NMR results correlated well with structural changes observed via FTIR and XPS analyses. XRD analysis of crystallised glass samples revealed the presence of calcium pyrophosphate (Ca2P2O7) and sodium metaphosphate (NaPO3) phases for all the glass formulations explored. Yttrium-containing phases were found for the formulations containing 3 and 5 mol% Y2O3. Degradation analyses performed in Phosphate buffer saline (PBS) and Milli-Q water revealed significantly reduced rates with addition of Y2O3 content. This decrease was attributed to the formation of Y-O-P bonds where the octahedral structure of yttrium (YO6) cross-linked phosphate chains, subsequently leading to an increase in chemical durability of the glasses. The ion release studies also showed good correlation with the degradation profiles.","PeriodicalId":37354,"journal":{"name":"Biomedical Glasses","volume":"6 1","pages":"34 - 49"},"PeriodicalIF":0.0000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/bglass-2020-0004","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biomedical Glasses","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/bglass-2020-0004","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Materials Science","Score":null,"Total":0}

引用次数: 5

Abstract

Abstract This study investigates the role of yttrium in phosphate-based glasses in the system 45(P2O5)–25(CaO)– (30-x)(Na2O)–x(Y2O3) (0≤x≤5) prepared via melt quenching and focuses on their structural characterisation and degradation properties. The structural analyses were performed using a combination of solid-state nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). 31P NMR analysis showed that depolymerisation of the phosphate network occurred which increased with Y2O3 content as metaphosphate units (Q2) decreased with subsequent increase in pyrophosphate species (Q1). The NMR results correlated well with structural changes observed via FTIR and XPS analyses. XRD analysis of crystallised glass samples revealed the presence of calcium pyrophosphate (Ca2P2O7) and sodium metaphosphate (NaPO3) phases for all the glass formulations explored. Yttrium-containing phases were found for the formulations containing 3 and 5 mol% Y2O3. Degradation analyses performed in Phosphate buffer saline (PBS) and Milli-Q water revealed significantly reduced rates with addition of Y2O3 content. This decrease was attributed to the formation of Y-O-P bonds where the octahedral structure of yttrium (YO6) cross-linked phosphate chains, subsequently leading to an increase in chemical durability of the glasses. The ion release studies also showed good correlation with the degradation profiles.

查看原文本刊更多论文

掺钇磷酸盐基玻璃:结构和降解分析

摘要本文研究了45(P2O5) - 25(CaO) - (30-x)(Na2O) -x (Y2O3)(0≤x≤5)熔融淬火法制备体系中钇在磷酸盐基玻璃中的作用，重点研究了其结构表征和降解性能。结构分析采用固态核磁共振(NMR)、傅里叶变换红外光谱(FTIR)和x射线光电子能谱(XPS)相结合的方法进行。核磁共振31P分析表明，随着Y2O3含量的增加，磷酸网络发生了解聚合，偏磷酸单位(Q2)随着焦磷酸种类(Q1)的增加而减少。核磁共振结果与FTIR和XPS分析观察到的结构变化具有良好的相关性。对结晶玻璃样品的XRD分析表明，在所探索的所有玻璃配方中都存在焦磷酸钙(Ca2P2O7)和偏磷酸钠(NaPO3)相。在含有3和5 mol% Y2O3的配方中发现了含钇相。在磷酸盐缓冲盐水(PBS)和mil - q水中进行的降解分析显示，添加Y2O3含量显著降低了降解率。这种减少是由于Y-O-P键的形成，其中钇(YO6)的八面体结构交联磷酸链，随后导致玻璃的化学耐久性增加。离子释放研究也显示了与降解谱的良好相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Biomedical Glasses Materials Science-Surfaces, Coatings and Films

自引率

0.00%

发文量

审稿时长

17 weeks

期刊介绍： Biomedical Glasses is an international Open Access-only journal covering the field of glasses for biomedical applications. The scope of the journal covers the science and technology of glasses and glass-based materials intended for applications in medicine and dentistry. It includes: Chemistry, physics, structure, design and characterization of biomedical glasses Surface science and interactions of biomedical glasses with aqueous and biological media Modeling structure and reactivity of biomedical glasses and their interfaces Biocompatibility of biomedical glasses Processing of biomedical glasses to achieve specific forms and functionality Biomedical glass coatings and composites In vitro and in vivo evaluation of biomedical glasses Glasses and glass-ceramics in engineered regeneration of tissues and organs Glass-based devices for medical and dental applications Application of glasses and glass-ceramics in healthcare.