Synthesis and characterization of mesoporous bioactive glasses with highly ordered structures and high surface areas by a self-assembly process
| Autor: | Bowen Wang, Xiang Zhou, Jiapan Luan, Xiaoran Yang, Yin Zhang, Zhenning Wu, Zhiwei Wu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Small-angle X-ray scattering 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hydrothermal circulation Electronic Optical and Magnetic Materials law.invention Adsorption Chemical engineering law Specific surface area 0103 physical sciences Materials Chemistry Ceramics and Composites Calcination Texture (crystalline) Fourier transform infrared spectroscopy 0210 nano-technology Mesoporous material |
| Zdroj: | Journal of Non-Crystalline Solids. 517:1-8 |
| ISSN: | 0022-3093 |
| Popis: | Mesoporous bioactive glasses (MBGs) are considered to be outstanding bone-repairing materials. MBGs were prepared by a two-step acid-catalyzed self-assembly (TSACSA) process combined with a hydrothermal reaction. To synthesize the optimized texture organization, an orthogonal experiment was designed under the same conditions (acid concentration, calcination temperature, hydrothermal time and hydrothermal temperature). The MBGs were characterized by N2 adsorption analysis, SAXS and TEM. The in vitro bioactivity was investigated by XRD and FTIR after soaking in SBF for 3 and 6 h. The results illustrated that the calcination temperature was the key factor affecting pore volume and the specific surface area. The hydrothermal temperature had the greatest impact on pore size. Compared with MBG prior to hydrothermal treatment, MBG after hydrothermal treatment displays more highly ordered mesopores and more uniform cylindrical pores. In the in vitro bioactivity test, synthesized MBG presents hydroxyapatite (HA) mineralization activity within a short time. The optimal conditions of the synthetic process were 1 mol L−1 hydrochloride acid, a hydrothermal reaction temperature of 120 °C for 24 h and a calcination temperature of 500 °C. This resulted in a large pore volume (1.22 ± 0.06 cm3 g−1) and high specific surface (679 ± 32 m2 g−1). |
| Databáze: | OpenAIRE |
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