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Erizal Erizal
Centre for the Application of Isotopes and Radiation Technology, BATAN, Jl. Lebak Bulus Raya No.49, Pasar Jumat, Jakarta 12070
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Effect of Gamma Irradiation on Mechanical and Thermal Properties of Fish Gelatin Film Isolated from Lates Calcarifer Scales Dian Pribadi Perkasa; Erizal Erizal; Darmawan Darmawan; Akhmad Rasyid
Indonesian Journal of Chemistry Vol 13, No 1 (2013)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3230.142 KB) | DOI: 10.22146/ijc.21322

Abstract

The objective of this research was to investigate the effect of gamma irradiation on mechanical and thermal properties of fish gelatin films prepared from scales of Lates calcarifer. The films were irradiated by gamma rays at varied doses (0-50 kGy). The mechanical and thermal properties of irradiated gelatin films were measured by using colorimeter, Universal Testing Machine, Differential Scanning Calorimetry (DSC), and Fourier Transform Infrared (FTIR) spectrophotometer. The results showed that increasing of irradiation dose up to 50 kGy, the color of irradiated film did not change significantly (p < 0.05). The tensile strength of irradiated film was increased with no differences among dose variation but there was no change on elongation at break value (p < 0.05). The DSC spectra of irradiated gelatin films showed that irradiation did not affect melting temperature (Tm). In contrast, the glass transition temperature (Tg) of irradiated film has slight tendency to increase with increasing of radiation doses. In general, the FTIR spectra confirmed that gamma irradiation up to 50 kGy affected the mechanical properties of gelatin films.
Synthesis of Polyvinyl Pirrolidone (PVC) /Κ-Carrageenan Hydrogel Prepared by Gamma Radiation Processing As a Function of Dose and PVP Concentration Erizal Erizal; Tjahyono Tjahyono; Dian PP; Darmawan Darmawan
Indonesian Journal of Chemistry Vol 13, No 1 (2013)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1916.236 KB) | DOI: 10.22146/ijc.21324

Abstract

The aim of this research is to prepare a biomaterial to be used in health care. A series of hydrogels based on polyvinyl pyrrolidone (PVP)/κ-Carrageenan (KC) has been prepared by radiation technique. PVP (5-15%) were mixed with ΚC (2%) and irradiated by gamma rays at the doses from 25 kGy to 35 kGy (dose rate 7 kGy/h) at room temperature. The chemical change of hydrogels was characterized using Fourier Transform infra Red (FTIR). Gel fraction, water absorption and water evaporation were determined gravimetrically. Tensile strength and elongation at break was measured using Instron meter. It was found that with the increase irradiation dose and PVP concentration, the gel fraction and tensile strength of hydrogels increase. In contrast the elongation at break and water absorption of hydrogels decrease. The hydrogel of PVP/KC hydrogel produced by gamma radiation can be considered for wound dressings.
Co-Authors Akhmad Rasyid Darmawan Darmawan Dian PP Dian Pribadi Perkasa Tjahyono Tjahyono