CD Tesis
kinetika pertumbuhan kristal hidroksiapatit dari precipitated calcium carbonate (pcc) kulit telur ayam secara hidrotermal
In Indonesia, the incidence of bone fractures in 2018 reached
approximately nine million cases, with various types and causes. Hydroxyapatite
(Ca₁₀(PO₄)₆(OH)₂ or HAp) is one of the bioceramics commonly used in
biomedical applications due to its biocompatible and osteoconductive properties,
allowing it to integrate well with bone.
This study aims to determine the time required for hydroxyapatite (HAp)
production by observing the crystal growth of HAp from chicken eggshells. The
objective of this research is to examine the effect of reaction temperature (120 and
140°C) and hydrothermal reaction time (1, 3, 4, 5, 7, and 9 hours) on the crystal
growth of apatite compounds derived from Precipitated Calcium Carbonate
(PCC) of chicken eggshells. Technically, PCC has advantages such as small
particle size (microscale) and high homogeneity.
HAp is synthesized from PCC and diammonium hydrogen phosphate
((NH₄)₂HPO₄) as a phosphate source in a hydrothermal reactor. The produced
HAp is characterized using X-ray diffraction (XRD). The obtained HAp crystals
have a hexagonal shape with high precision in crystalline details, resembling
Holly Springs hydroxyapatite. The optimal condition for producing the largest
HAp crystal diameter was achieved at a temperature of 140°C, measuring 33.29
nm, with a reaction time of 9 hours. Thus, the higher the reaction temperature and
the longer the synthesis time, the larger the resulting HAp crystal diameter.
Keywords: Bone, Eggshells, Precipitated Calcium Carbonate, Hidroxyapatite
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