Doping effects of Pd2+ on physicochemical and biomechanical properties of calcium silicate in nano-regime towards treating osteoporotic bone
| Autor: | Bahman Nasiri-Tabrizi, Qianye Li, Xili Zhang, Xiaomei Zhang, Wen Meng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Dopant Rietveld refinement Simulated body fluid chemistry.chemical_element 02 engineering and technology Calcium 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Phase (matter) Calcium silicate Vickers hardness test General Materials Science 0210 nano-technology Pseudowollastonite |
| Zdroj: | Materials Chemistry and Physics. 267:124609 |
| ISSN: | 0254-0584 |
| Popis: | Fully dense biphasic calcium silicates with improved biomechanical behavior were fabricated via mechanothermal method followed by the conventional sintering process. The effects of dopant concentration on the phase composition, structural evolution, and mechanical properties of palladium-doped calcium silicates (PCSs) were investigated. The results showed that the coalescence of nanoparticles, coarsening of particles, and the formation of large agglomerates occurred during the mechanothermal reactions. Attenuated total reflection (ATR) spectroscopy spectra of the PCSs represented the characteristic bands of the calcium silicates, including the bending mode of Si–O–Si and O–Si–O, the stretching vibration of O–Si–O group, the stretching mode of Si–O–Ca, as well as the symmetrical stretching mode of Si–O–Si group. The results of the Rietveld refinement indicated that the phase compositions and structural features noticeably affected by the dopant concentration so that the phase fraction (PF) of Wollastonite-1A and Pseudowollastonite was 0.318 ± 0.035 and 0.526 ± 0.025 in the case of undoped calcium silicate (PCS0), which respectively reached 0.411 ± 0.021 and 0.589 ± 0.021 for the Pd-doped calcium silicate (PCS20). Comparing with the PCS0, the Vickers hardness of the consolidated PCS20 increased by ~79%. From the biomineralization analysis, the surface of the consolidated sample was covered by the bone-like apatite after soaking in a simulated body fluid (SBF) for 2 weeks. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect