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<p>Over the past few decades, biomaterials have drastically changed the biomedical field and are still gaining much attention. Because of their exceptional bioactivity and advantageous physical characteristics, phosphate glasses have attracted much attention among the different biomaterials due to their potential for use in various biomedical applications, especially in the regeneration of soft and hard tissues. The traditional melt-quench method was used in this study to create phosphate-based glasses with the composition 40P<sub>2</sub>O<sub>5</sub> − 40K<sub>2</sub>O - (20-<i>x</i>) TiO<sub>2</sub> – <i>x</i>CaO (where CaO is derived from eggshells, with <i>x</i> = 0, 2, 4, 6, and 8&#xa0;mol%). X-ray diffraction (XRD) analysis confirmed that the glasses were amorphous. Using Archimedes’ principle, the density of the glass samples was ascertained, and the corresponding molar volumes were computed. UV–visible absorption spectra were captured to estimate the samples’ optical band gap. Fourier-transform infrared (FTIR) and Raman spectroscopy were used for structural characterization. Standard relations were also employed to evaluate the refractive index and Urbach energy. In addition, antibacterial assays were performed to assess the biological activity of the samples, while degradation studies and pH measurements were carried out to evaluate their stability and environmental compatibility. By using eggshell waste as a calcium source, the prepared glasses promote sustainability and show promise for use in biomedical devices.</p>

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Optical and physical properties of eggshell-derived CaO-doped potassium titanium phosphate bioactive glasses

  • 期刊论文

  • 发表日期：

    2025年9月17日

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  • Jahnavi Bhagavath G,
  • B. Eraiah

摘要

Over the past few decades, biomaterials have drastically changed the biomedical field and are still gaining much attention. Because of their exceptional bioactivity and advantageous physical characteristics, phosphate glasses have attracted much attention among the different biomaterials due to their potential for use in various biomedical applications, especially in the regeneration of soft and hard tissues. The traditional melt-quench method was used in this study to create phosphate-based glasses with the composition 40P2O5 − 40K2O - (20-x) TiO2 – xCaO (where CaO is derived from eggshells, with x = 0, 2, 4, 6, and 8 mol%). X-ray diffraction (XRD) analysis confirmed that the glasses were amorphous. Using Archimedes’ principle, the density of the glass samples was ascertained, and the corresponding molar volumes were computed. UV–visible absorption spectra were captured to estimate the samples’ optical band gap. Fourier-transform infrared (FTIR) and Raman spectroscopy were used for structural characterization. Standard relations were also employed to evaluate the refractive index and Urbach energy. In addition, antibacterial assays were performed to assess the biological activity of the samples, while degradation studies and pH measurements were carried out to evaluate their stability and environmental compatibility. By using eggshell waste as a calcium source, the prepared glasses promote sustainability and show promise for use in biomedical devices.