Abstract
Due to similarity in composition to the mineral component of bones and human hard tissues, hydroxyapatite with chemical formula Ca10(PO4)6(OH)2 has been widely used in medical field. Both chicken and duck eggshells are mainly composed of calcium carbonate. An attempt has been made to fabricate nanohydroxyapatite (nHA) by chicken (CES) and duck eggshells (DES) as calcium carbonate source (CaCO3). CES and DES were reacted with diammonium hydrogen [(NH4)2HPO4] solution and subjected to microwave heating at 15 mins. Under the effect of microwave irradiation, nHA was produced directly in the solution and involved in crystallographic transformation. Sample characterization was done using by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM).
Highlights
Hard tissue is one of the crucial components of our body
HA can be produced by various synthesis routes including chemical precipitation method [13], hydrothermal techniques [8], sol-gel route [14], and mechanochemical [15] techniques using different sources of calcium and phosphorus as starting materials
Most of HA powders prepared by chemical precipitation route have calcium deficiency and HA powders produced from these methods exhibit thermal decomposition of HA to α- or βtricalcium phosphate phase [13]
Summary
Hard tissue is one of the crucial components of our body. Natural bone is a type of nanocomposite containing organic (30%) and inorganic compounds (70%) in a form of needleor rod-like materials with length of 25–50 nm [1, 2]. HA can be produced by various synthesis routes including chemical precipitation method [13], hydrothermal techniques [8], sol-gel route [14], and mechanochemical [15] techniques using different sources of calcium and phosphorus as starting materials. HA powder was synthesized from both chicken and duck eggshells as calcium source using microwave irradiation. The precipitate formed was centrifuged at the rotation speed of 3000 rpm several times with distilled water to eliminate the remaining ammonia It was held at the sample holder to observe the images
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