Growth of strontium hydrogen phosphate/gelatin composites: a biomimetic approach

Parvinzadeh Gashti, Mazeyar; Stir, Manuela Elena; Hulliger, Jürg (2016). Growth of strontium hydrogen phosphate/gelatin composites: a biomimetic approach. New journal of chemistry, 40(6), pp. 5495-5500. Royal Society of Chemistry 10.1039/c5nj03575a

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Recent research has focused on the crystal growth of strontium phosphates via different methods due to the bioactivity and biocompatibility of these materials with bone tissue. Here, we use a biomimetic method to synthesize strontium hydrogen phosphate/gelatin composites via single diffusion in gelatin. We compare the composite crystals with analytical-grade strontium hydrogen phosphate using infrared spectroscopy (IR), scanning electron microscopy (SEM), thermal gravimetric analysis, and X-ray diffraction. The IR spectra reveal that gelatin is incorporated into strontium hydrogen phosphate crystals due to CH2 and amide I vibrations. The SEM data exhibit arrow-like crystals and microspheres of strontium hydrogen phosphate with bundled nano-flakes and flower-like surface arrangements of crystals. Furthermore, we find that the thermal stability of the strontium hydrogen phosphate/gelatin composite crystals is higher than that of the analytical-grade strontium hydrogen phosphate. The ion concentration and the preparation method had only a small influence on the broadening of the X-ray Bragg reflections. Our study confirms that gelatin is a useful hydrogel for studying the crystallization of strontium hydrogen phosphate.

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