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<p>In this study, magnesium aluminate spinel (MgAl<sub>2</sub>O<sub>4</sub>) particles were synthesized at 500&#xa0;°C using the combustion method followed by calcination at 800&#xa0;°C. Subsequently, PLA (Polylactic acid)/MgAl<sub>2</sub>O<sub>4</sub> scaffolds were fabricated and developed employing the slurry casting approach. In this research, 4 and 8 wt.% of magnesium aluminate spinel were used for composite production. To analyze the crystal structure, surface chemistry, microstructure, and biodegradability of the produced composites, X-ray diffraction analysis (XRD), Fourier transform infrared (FTIR), field scanning electron microscopy (FESEM), inductively coupled plasma (ICP), and potentiometric evaluations were employed. The Rietveld results of XRD data revealed that MgAl<sub>2</sub>O<sub>4</sub> particles have been properly dispersed in the slurry casted specimens. FTIR characterization confirmed bonding formation between the MgAl<sub>2</sub>O<sub>4</sub> reinforcement and the PLA matrix. FESEM/EDX results indicated that MgAl<sub>2</sub>O<sub>4</sub> spinel, with the sub-micron-sized particles, significantly accelerated the degradation rate. As the ICP analysis confirmed the bioactivity of the PLA/MgAl<sub>2</sub>O<sub>4</sub> composites by observing a meaningful reduction of Ca and P elements in simulated body fluid (SBF), it is hopefully concluded that the mentioned composites can be employed as effective biomaterials. Moreover, an increase in pH after 4&#xa0;weeks indicated the degradation of composites. Meanwhile, the values of pH vary between 7.6 and 7.8, which is close to the pH of the human body.</p>

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Synthesis of PLA/MgAl2O4 Composite Using Slurry Casting Method: A Study on Biomaterial Properties

  • 期刊论文

  • 发表日期：

    2025年1月23日

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  • Mehran Ghodrati,
  • Seyed Mahdi Rafiaei,
  • Lobat Tayebi

摘要

In this study, magnesium aluminate spinel (MgAl2O4) particles were synthesized at 500 °C using the combustion method followed by calcination at 800 °C. Subsequently, PLA (Polylactic acid)/MgAl2O4 scaffolds were fabricated and developed employing the slurry casting approach. In this research, 4 and 8 wt.% of magnesium aluminate spinel were used for composite production. To analyze the crystal structure, surface chemistry, microstructure, and biodegradability of the produced composites, X-ray diffraction analysis (XRD), Fourier transform infrared (FTIR), field scanning electron microscopy (FESEM), inductively coupled plasma (ICP), and potentiometric evaluations were employed. The Rietveld results of XRD data revealed that MgAl2O4 particles have been properly dispersed in the slurry casted specimens. FTIR characterization confirmed bonding formation between the MgAl2O4 reinforcement and the PLA matrix. FESEM/EDX results indicated that MgAl2O4 spinel, with the sub-micron-sized particles, significantly accelerated the degradation rate. As the ICP analysis confirmed the bioactivity of the PLA/MgAl2O4 composites by observing a meaningful reduction of Ca and P elements in simulated body fluid (SBF), it is hopefully concluded that the mentioned composites can be employed as effective biomaterials. Moreover, an increase in pH after 4 weeks indicated the degradation of composites. Meanwhile, the values of pH vary between 7.6 and 7.8, which is close to the pH of the human body.