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Sudaryanto Sudaryanto
Pusat Teknologi Bahan Industri Nuklir (PTBIN) - BATAN Kawasan Puspiptek, Serpong 15314, Tangerang Selatan
Materials Science & Nanotechnology

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SYNTHESIS AND IMMOBILIZATION OF CAPTOPRILIN HYDROGEL POLYVINYL ALCOHOL-POLYVINYL PIRROLIDONE PREPARED BY FREEZING-THAWAND GAMMA RADIATION Erizal Erizal; Darmawan Darmawan; Sudirman Sudirman; Sudaryanto Sudaryanto
Jurnal Sains Materi Indonesia Vol 14, No 4: JULI 2013
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (251.995 KB) | DOI: 10.17146/jsmi.2013.14.4.4383

Abstract

SYNTHESIS AND IMMOBILIZATION OF CAPTOPRILIN HYDROGEL POLYVINYL ALCOHOL-POLYVINYL PIRROLIDONE PREPARED BY FREEZING-THAWAND GAMMA RADIATION. In order to apply the hydrogel as a matrix for controlled drug release, the polyvinylalcohol (PVA)-polyvinyl pirrolidone (PVP) hydrogels have been synthesized and used for immobilization of captopril. The mixture of PVA-PVP solution containing captopril were freezing and thawing followed by gamma irradiation from Co-60 with the doses of 10 kGy, 20 kGy and 30 kGy. The water absorption and gel fraction of hydrogels were measured gravimetrically. The chemical changes of hydrogels were determined using Fourier Transform Infrared (FT-IR) spectrometer. The release of captopril were monitored using Ultra Violet-Visible (UV-Vis) spectrophotometer. It was found that with increasing cycled of freeze-thawing and irradiation dose up to 30 kGy, gel fraction and water absorption of hydrogels increase. FT-IR spectra demonstrated that there was strong intermolecular crosslinking between the PVAand PVP. The release rate of captopril from hydrogel increases with increasing irradiation dose. The release pattern indicates that the captopril released in medium were with zero order during most of the release period and generally with burst effect. The results suggest that crosslinked PVA-PVP hydrogels are suitable for controlled release of drug.
ANALISIS FASA NANO PARTIKEL LiCoO2 SEBAGAI BAHAN KATODA BATERAI MAMPU ISI ULANG MENGGUNAKAN X-RAY DIFFRACTOMETER Elman Panjaitan; Sudaryanto Sudaryanto; Yosef Sarwanto; Bambang Soegijono
Jurnal Sains Materi Indonesia Vol 14, No 3: APRIL 2013
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (402.987 KB) | DOI: 10.17146/jsmi.2013.14.3.4407

Abstract

ANALISIS FASA NANO PARTIKEL LiCoO2 SEBAGAI BAHAN KATODA BATERAI MAMPU ISI ULANG MENGGUNAKAN X-RAY DIFFRACTOMETER. Telah dilakukan penelitian analisis fasa nano partikel LiCoO2 sebagai bakal bahan katoda dari baterai berbasis ion lithium yang mampu disi ulang menggunakan X-Ray Diffractometer. Nano partikel LiCoO2 dibentuk menggunakan teknik planetary milling yang diikuti sonikasi, hasil pembentukan nano partikel LiCoO2 dianalisis menggunakan Scanning Electron Microscope (SEM) dan Transmission Electron Microscope (TEM), fasa nano partikel LiCoO2 dianalisis menggunakan XRD. Hasil penelitian menunjukan bahwa nano partikel LiCoO2 yang terbentuk berukuran 20 nm hingga 40 nm dan fasa nano partikel LiCoO2 adalah rhombohedral, R-3m, dengan a = b = 2,82 Å dan c = 14,08 Å, dimana LiCo membentuk simetri oktahedral, 3-3m dan CO2 membentuk simetri tetrahedral, 63m.
Co-Authors Bambang Soegijono Darmawan Darmawan Elman Panjaitan Erizal Erizal Sudirman Sudirman Yosef Sarwanto