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KMID : 0903520070500020111
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2007 Volume.50 No. 2 p.111 ~ p.115
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Characteristics of Low Molecular Weight Alginate Film Prepared with γ-irradiation
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Ha Sang-Hyung
Kim Byung-Yong
Rhim Jong-Whan
Baik Moo-Yeol
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Abstract
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To modify the physical properties of alginate film, the gamma ray irradiation was performed, and alginate film properties such as elongation strength (ES), elongation rate (ER), water vapor permeability (WVP), and water solubility (WS) were measured. The film made from 1.75% alginate solution (w/w) with the addition of 2% CaCl2 solution suggested a good application for a film preparation in that elongation strength(ES) increased 5 fold by CaCl2 treatment and water vapor permeability was decreased by 17~22%. A solid form of alginates were irradiated with Co60 gamma rays in the dose range of 2 to 10 kGy to make a low molecular weight alginate film, and then the intrinsic viscosity and the molecular weight of alginates were measured. Increasing the dose range of 2 to 10 kGy produced lower intrinsic viscosity and lower molecular weight, causing the decrease in the ES and WS. However, ER increased four times compared to that of without gamma ray dose, which is an indication of the different properties of algiante film. WVP of the films did not show any significant change at different doses.
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KEYWORD
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alginate film, gamma ray dose, low molecular weight alginate film
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