Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Development of the Functional Films Coated with Nano-TiO2 Particles for Food Packaging and Removal of Off-flavor from Soybean Sprouts

나노 TiO2를 적용한 식품 포장 필름 개발 및 콩나물의 이취 제거

  • 최연욱 (연세대학교 패키징학과) ;
  • 전규배 (연세대학교 패키징학과) ;
  • 송기현 (연세대학교 패키징학과) ;
  • 김재능 (연세대학교 패키징학과)
  • Received : 2015.06.23
  • Accepted : 2015.11.30
  • Published : 2015.12.31
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Abstract

For testing the ultraviolet (UV)-blocking property of functional films coated with Nano-$TiO_2$ particles, UV-Vis spectra of oriented polypropylene (OPP) films uncoated and coated with $TiO_2$ of 3% and 5% in Polyurethane (PU) and polyvinyl butyral (PVB)-Cellulose binders were measured. The result of UV-Vis analyses showed that the film coated with 5% $TiO_2$ in PVB binders had a significant effect on UV protection of 90% compared with the film uncoated. Also The result of The photodegradation of methylene blue (MB), OPP films coated with 5% in both PU and PVB binders had a high photocatalytic activity for MB degradation. To evaluate the effect of the developed functional film coated with Nano-$TiO_2$ particles, fresh soybean sprouts were used. Nano-$TiO_2$ coated film was observed to decompose the off-flavor produced by soybean sprouts within packages during distribution, but uncoated film did not. Therefore, Nano-$TiO_2$ coated film package could give the greatest effect in extending the shelf life of soybean sprouts.

나노 $TiO_2$ 코팅 필름은 식품 포장재에서 많이 사용하는 PU와 PVB-cellulose 두 가지 바인더에 나노 콜로이달 $TiO_2$를 각각 3%와 5%의 농도로 혼합제조하여 OPP 필름에 코팅하였다. PVB 바인더로 코팅한 필름이 PU 바인더(3%와 5%)보다 불균일하게 필름에 코팅이 되었다. 그러나 청변현상 방지 실험과 광분해 실험에서는 필름 코팅 상태와 상관없이 선도 유지 효과가 나타났다. MB를 사용한 광분해성 효과 측정 실험에서 나노 $TiO_2$의 광촉매 반응으로 인해 초기 30분부터 MB가 분해되는 것을 확인하였고, 콩나물 포장재 내에서 혐기성 호흡으로 발생하는 이취인 acetaldehyde는 나노 $TiO_2$ 코팅 필름이 대조구에 비해 농도가 감소하는 것을 확인하였다. 따라서 개발된 나노 $TiO_2$ 코팅 필름으로 콩나물의 청변 현상과 이취 제거로 인해 콩나물의 보관 수명을 연장할 수 있었다.

Keywords

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