- Bandung, Indonesia
Telah dilakukan pembuatan keramik untuk material konstruksi dengan bahan baku serbuk sludge yang berasal dari limbah oil sludge Pertamina dan kaolin sebagai bahan pengikat. Variasi komposisi serbuk sludge antara lain: 50, 55, 60, s.d. 95... more
Telah dilakukan pembuatan keramik untuk material konstruksi dengan bahan baku serbuk sludge yang berasal dari limbah oil sludge Pertamina dan kaolin sebagai bahan pengikat. Variasi komposisi serbuk sludge antara lain: 50, 55, 60, s.d. 95 % (dalam % massa) serta penambahan kaolin: 5, 10, 15, s.d. 50 % (dalam % massa), temperatur sinter adalah 1200 0C dengan variasi waktu penahanan selama 1, 2, dan 3 jam. Dimensi sampel uji yang dibuat dalam dua bentuk, yaitu silinder rigid dan balok. Parameter pengujian yang dilakukan meliputi: densitas, porositas, kuat tekan, kekerasan vickers, kuat patah, kuat impak, dan analisis mikrostruktur dengan X-ray diffractometer (XRD). Hasil pengujian menunjukkan bahwa keramik yang dihasilkan pada komposisi 50 % (massa) serbuk sludge, 50% (massa) kaolin, temperatur sinter 1200 0C, dan waktu penahanan selama 3 jam merupakan hasil yang optimum. Pada komposisi tersebut, keramik yang dihasilkan memiliki karakteristik sebagai berikut: densitas = 1,13 g/cm3, porositas = 34,48 %, kuat tekan = 662,32 kgf/cm2, kekerasan vickers = 111,4 kgf/mm2, kuat patah = 326,44 kgf/cm2, dan kuat impak = 1,70 J/cm2. Hasil analisis mikrostruktur dengan XRD menunjukkan bahwa phasa dominan yang terbentuk adalah sodium-calcium-silicate dan sillimanite, dan phasa minor: cordierite, arsenic-oxide, sodium-cadmium-phosphate, dan indialite.
Research Interests:
The global need of biomaterial products especially in bone clinical application increases every year. The gold methods like autograft and allograft have some limitations in the application such as the availability of donor sites,... more
The global need of biomaterial products especially in bone clinical application increases
every year. The gold methods like autograft and allograft have some limitations in the application
such as the availability of donor sites, antigenicity issues, the high cost, etc. To solve the problems,
many researches and activities in the field of biomaterial have been conducted continuously in the
past decades to develop the proper synthetic materials for bone substitutes which have properties
similar to bone tissue. In this research, the synthesis of biocomposite for bone scaffold application
prepared by freeze drying method has been done successfully. The materials used are biopolymer
(alginate and chitosan) and bioceramics (carbonate apatite) with certain mixing variations. SEM
result showed that the pores obtained by freeze drying method can mimic the pores of actual bone
thus they will be able to resemble cells microenvironment, enhance interface interaction, and
support cell proliferation. The existence of carbonate apatite on the scaffold’s surface can be
observed with particle size of 0.05 – 1 μm and has been dispersed evenly. These results are in good
agreement with FT-IR analysis that indicates the presence of PO4
3– functional group on the scaffold
at wave numbers 569 and 1041.56 cm–1 and CO3
2– functional group at wave number 1411.89 cm–1.
The in vitro biological evaluation of HeLa cells which exposed to extract solution of scaffold (in
some variations of concentration) indicated that the scaffold obtained was not cytotoxic to the HeLa
cells.
every year. The gold methods like autograft and allograft have some limitations in the application
such as the availability of donor sites, antigenicity issues, the high cost, etc. To solve the problems,
many researches and activities in the field of biomaterial have been conducted continuously in the
past decades to develop the proper synthetic materials for bone substitutes which have properties
similar to bone tissue. In this research, the synthesis of biocomposite for bone scaffold application
prepared by freeze drying method has been done successfully. The materials used are biopolymer
(alginate and chitosan) and bioceramics (carbonate apatite) with certain mixing variations. SEM
result showed that the pores obtained by freeze drying method can mimic the pores of actual bone
thus they will be able to resemble cells microenvironment, enhance interface interaction, and
support cell proliferation. The existence of carbonate apatite on the scaffold’s surface can be
observed with particle size of 0.05 – 1 μm and has been dispersed evenly. These results are in good
agreement with FT-IR analysis that indicates the presence of PO4
3– functional group on the scaffold
at wave numbers 569 and 1041.56 cm–1 and CO3
2– functional group at wave number 1411.89 cm–1.
The in vitro biological evaluation of HeLa cells which exposed to extract solution of scaffold (in
some variations of concentration) indicated that the scaffold obtained was not cytotoxic to the HeLa
cells.