CUTTLEFISH (Sepia Sp.) DERIVED HEAT RESISTANCE HYDROXYAPATITE/ALGINATE COMPOSITES THROUGH THE SOL-GEL METHOD

Abstract

This work aims to synthesize hydroxyapatite/alginate (HAp/Alg) composites with varied alginate concentrations using the sol-gel method and evaluate the effect of alginate addition on the features of generated HAp/Alg composites. Calcium precursor was obtained from cuttlefish shell calcined at 900℃ for 5 hours. FTIR spectrum demonstrated the presence of hydroxyapatite and alginate functional groups. XRD data revealed the typical peaks of HAp and alg in all of the alginate concentration variation composites, indicating the formation of HAp/Alg composites. The SEM image of HAp/Alg-15 exhibited agglomerated rod-like and spherical-like particles, while EDX results identified the elements Ca, O, P, and C with a Ca/P ratio of 1.77. The TGA-DTA curve demonstrated increased heat resistance and no weight loss above 802℃. Finally, the HAp/Alg-15 composite has the potential to be employed in the biomedical field as a bone implant.