Core/Clad Phosphate Glass Fibres Containing Iron and/or Titanium

Q1 Materials Science

Biomedical Glasses Pub Date : 2015-07-20 DOI:10.1515/bglass-2015-0004

I. Ahmed, S. Shaharuddin, N. Sharmin, D. Furniss, C. Rudd

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引用次数: 12

Abstract

Abstract Phosphate glasses are novel amorphous biomaterials due to their fully resorbable characteristics, with controllable degradation profiles. In this study, phosphate glasses containing titanium and/or iron were identified to exhibit sufficiently matched thermal properties (glass transition temperature, thermal expansion coefficient and viscosity) which enabled successful co-extrusion of glass billets to form a core/clad preform. The cladding composition for the core/clad preforms were also reversed. Fe clad and Ti clad fibres were successfully drawn with an average diameter of between 30~50 μm. The average cladding annular thickness was estimated to be less than 2 μm. Annealed core/clad fibres were degraded in PBS for a period of 27 days. The strength of the Fe clad fibres appeared to increase from 303 ± 73 MPa to 386 ± 45 MPa after nearly 2 weeks in the dissolution medium (phosphate buffered solution) before decreasing by day 27. The strength of the Ti clad fibres revealed an increase from 236 ± 53 MPa to 295 ± 61 MPa when compared at week 3. The tensile modulus measured for both core/clad fibres ranged between 51 GPa to 60 GPa. During the dissolution study, Fe clad fibres showed a peeling mechanism compared to the Ti clad fibres.

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含铁和/或钛的芯/包层磷酸盐玻璃纤维

磷酸盐玻璃是一种新型的无定形生物材料，具有完全可吸收的特性，具有可控的降解特征。在这项研究中，含有钛和/或铁的磷酸盐玻璃被确定为具有足够匹配的热性能(玻璃化转变温度、热膨胀系数和粘度)，从而能够成功地共挤压玻璃坯，形成芯/包层预制体。芯/包层预制件的包层成分也相反。成功地拉伸出了平均直径在30~50 μm之间的铁包层和钛包层纤维。熔覆环的平均厚度小于2 μm。退火的芯/包层纤维在PBS中降解27天。在溶解介质(磷酸盐缓冲溶液)中，铁包覆纤维的强度在近2周后从303±73 MPa增加到386±45 MPa，第27天下降。与第3周相比，Ti包层纤维的强度从236±53 MPa增加到295±61 MPa。芯/包层纤维的拉伸模量在51 GPa到60 GPa之间。在溶解过程中，与钛包层纤维相比，铁包层纤维表现出剥离机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.