MODIFIKASI HIDROKSIAPATIT DARI TULANG IKAN GABUS (Channa striata) DENGAN MFe2O4 (M= Fe, Cu, Mn, Ni, dan Mg) PEG-4000 TERHADAP SIFAT KEMAGNETANNYA
Daftar Isi:
- Rima Melati: Supervised by Dr. Poedji Loekitowati H, M.Si and Dra. Fatma, M.S. Chemistry Department, Faculty of Mathematics and Natural Sciences, Sriwijaya University. Research on the modification of hydroxyapatite (HAp) from cork fish bones (Channa striata) with MFe2O4 (M = Fe, Cu, Mn, Ni, and Mg) has been carried out. This study aims to determine the composition with the best magnetic properties. Hydroxyapatite synthesis was carried out by the precipitation method with precursors (NH4)2HPO4 and CaO from cork fish bones. Hydroxyapatite-PEG-MFe2O4 composites were characterized by magnetic properties using VSM. The composite with the highest magnetic values were characterized using VSM, XRD, FTIR, SEM-EDS and pHpzc. Hydroxyapatite-PEG-MFe2O4 composite which has the highest magnetic properties, namely the composition of hydroxyapatite-PEG-Fe3O4 with a saturation magnetic value of 28.32 emu/g. Composites with the highest magnetic value based on VSM results varied with hydroxyapatite: Fe3O4 ratio (1:1, 1:2, and 1:3). Hydroxyapatite-PEG-Fe3O4 composite with ratio of 1: 3 has the highest magnetic value with a saturation value of 34.87 emu/g. The XRD characterization obtained particle size at a ratio of 1:1, 1:2 and 1:3, at 66.02; 14,14 and 15,53 nm. respectively these show that nanomagnetic qualify as nanomaterials because they have a size <100nm. The composites in the ratio of 1:3 have a pHpzc value at pH 8, the results of FTIR characterization on a hydroxyapatite-PEG-Fe3O4 composite ratio of 1: 3 show the existence of Fe-O vibrations of Fe3O4 at wavenumbers 574 cm-1 and 603.72 cm-1, PO vibrations of PO43- groups at wavenumbers 1033.85 cm-1 and OH vibrations at wave number 3408.22 cm-1. SEM results show that the surface is granular with a small round shape. Keywords : Fish bone, hydroxyapatite-PEG-Fe3O4, composite, magnetic properties. Citations : 82 (2002-2018)