Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Characteristics of Low Molecular Weight Alginate Film Prepared with ${\gamma}$-irradiation

방사선 처리에 의해 제조한 저분자 알긴산 필름의 특성

  • Ha, Sang-Hyung (Institute of Life Science and Resources, Department of Food Science and Biotechnology, Kyung Hee University) ;
  • Kim, Byung-Yong (Institute of Life Science and Resources, Department of Food Science and Biotechnology, Kyung Hee University) ;
  • Rhin, Jong-Whan (Department of Food Engineering, Mokpo National University) ;
  • Baik, Moo-Yeol (Institute of Life Science and Resources, Department of Food Science and Biotechnology, Kyung Hee University)
  • 하상형 (경희대학교 생명자원과학연구원 식품공학과) ;
  • 김병용 (경희대학교 생명자원과학연구원 식품공학과) ;
  • 임종환 (목포대학교 식품공학과) ;
  • 백무열 (경희대학교 생명자원과학연구원 식품공학과)
  • Published : 2007.06.30
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Abstract

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% CaCl$_2$ solution suggested a good application for a film preparation in that elongation strength(ES) increased 5 fold by CaCl$_2$ treatment and water vapor permeability was decreased by 17${\sim}$22%. A solid form of alginates were irradiated with Co$^{60}$ 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.

알긴산 필름의 물리적 성질을 변형시키기 위해, 감마선을 조사하였고, 그 필름의 연신강도, 연신율, 수분투과도 및 수분용해도를 측정하였다. 1.75%의 알긴산용액에 2% 칼슘용액에 침지하였을 때 연신강도가 5배 정도 증가하였으며, 수분용해도는 17${\sim}$22%로 감소하여 좋은 필름으로서의 성질을 보여주었다. 앞의 제조 조건을 이용하여, 2${\sim}$10kGy의 감마선이 조사된 저분자 알긴산을 이용하여 필름을 제조하였고, 본원적인 점도 및 알긴산의 분자량을 측정하였다. 감마선의 조사량이 2에서 10kGy로 증가할수록, 본원적 점도와 분자량은 크게 감소함을 보여주었으며, 연신강도와 수분용해도는 저분자화 될수록 감소하였으나 연신율은 4배정도 증가하였다. 투습계수는 감마선 조사량에 따른 유의차를 보이지 않아, 저 분자화된 알긴산필름의 경우 포장재질의 강도는 떨어지나 유연성이 크게 증가하는 포장재질의 특성변화를 보여주었다.

Keywords

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