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Riri Jonuarti
Department of Physics, Universitas Negeri Padang
Control & Systems Engineering Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

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Synthesis of Hydroxyapatite From Egg Shells Using Precipitation Methods For Bone Implant Application Veni Wahyuni; Riri Jonuarti; Ratnawulan; Rahmat Hidayat
Journal of Experimental and Applied Physics Vol 1 No 2 (2023): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i2.16

Abstract

Patients with fractures continue to increase from year to year. So that the need for biomaterials is very high and has had a considerable impact, especially in the field of orthopedic medicine. Hydroxyapatite (HAp) is one of the suitable biomaterials for bone implants. Hydroxyapatite (HAp) with the chemical formula C10(PO4)6O2H2 is a calcium phosphate that contains hydroxide, which is classified as a mineral in the apatite group. HAp can be obtained from natural waste such as the eggshells of a chicken. This is because chicken eggshells have a very high CaO content (98,43%) which serves as a precursor in the synthesis of HAp. The purpose of this research the aim of observing the effect of stirring time on the purity of the HAp produced and to see the optimum stirring time used to produce good HAp. In this study, HAp was synthesized using a precipitation method by varying the stirring time. Based on variations in stirring time of 1 hour, 2 hours, 3 hours, 4 hours, and 5 hours, the purity of HAp obtained was 15%, 49%, 66%, 82%, and 50%, respectively. Therefore, it was concluded that the optimal stirring time to produce HAp with the highest purity is at a time interval of 4 hours.
The Effect of Reflux Time from Natural Zeolite on Electrical Conductivity Fadli M; Gusnedi Gusnedi; Ratnawulan Ratnawulan; Riri Jonuarti
Journal of Experimental and Applied Physics Vol 1 No 3 (2023): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i3.33

Abstract

This study aims to determine the electrical properties, namely the value of the electrical conductivity of natural zeolite. Natural zeolite was synthesized using the reflux method with NaOH as an activator with variations of 12, 24, and 36 hours with a molar concentration of 5 M NaOH. Tests were carried out using XRF characterization (X Ray fluorescence), XRD (X Ray Diffraction), and LCR Meter. The XRD results showed the highest peak value at 36 hours of 85.22 nm. The XRF results of the zeolite elements formed were 66.087% SiO2 and 8.45% Al2O3. And in the LCR Meter test, the highest conductivity value was obtained at 36 hours of reflux with a conductivity value of 5.5x10-2 S/m. The value of the electrical conductivity is directly proportional to the particle size where the greater the conductivity value the greater the particle size produced.The electrical conductivity results showed that zeolites are included in semiconductor materials and have the potential as supercapacitor electrodes
Co-Authors Fadli M Gusnedi Gusnedi Rahmat Hidayat Ratnawulan . Veni Wahyuni