한국식품과학회지 (Korean Journal of Food Science and Technology)

한국식품과학회 (Korean Society of Food Science and Technology)
권호 표지

대두분리단백 필름(soy protein isolate)에 옥수수 단백(zein)과 밀 단백(gluten)을 각각 적층하여 제조한 필름의 이화학적 성질

Physicochemical Properties of Soy Protein Isolate Films Laminated with Corn Zein or Wheat Gluten

  • Lee, Myoung-Suk (Department of Food Science and Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Ma, Yu-Hyung (Department of Food Science and Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Park, Sang-Kyu (Gwangju Institute of Science and Technology) ;
  • Bae, Dong-Ho (Department of Applied Biology and Chemistry, Konkuk University) ;
  • Ha, Sang-Do (Department of Food Science and Technology, Chung-Ang University) ;
  • Song, Kyung-Bin (Department of Food Science and Technology, College of Agriculture & Life Sciences, Chungnam National University)
  • 발행 : 2005.02.28
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초록

대두 단백 필름의 물성을 개선하기 위하여 옥수수 단백과 밀 단백을 이용하여 적층하여 필름을 제조한 후 물성을 측정하였다. 옥수수 단백(필름 B)과 밀 단백(필름 C)으로 적층한 대두 단백 필름의 인장강도가 대구조에 비해 1.5배 이상 증가 하였고 필름 C에 비해 필름 B의 인장강도가 더 높게 나타났으며 또한, 필름 C의 경우 신장률이253%로 인장강도와 신장를 모두 증가 하였다. 투습계수 측정 결과, 대조구인 필름 A와 비교해서 필름 B와C는 그 차이는 적었지만 투습계수가 감소하였다. 하지만 적층한 필름의 투습계수에는 큰 변화가 없었다. 필름 용해도는 필름 B와 C가 대조구 보다 낮았다. 색도는 필름 A와 C는 큰 차이를 보이지 않았지만 옥수수 단백으로 적층한 필름 B의 b값과 YI값이 큰 차이를 보이며 황색을 나타냈다. 본 실험 결과는 밀 단백 필름으로 적층한 필름 C가 여러 물성 면에 있어서 식품의 포장재로써 효과적이라고 판단된다.

Soy protein isolate (SPI) film was laminated with corn zein or wheat gluten to improve functional properties. Both SPI/corn zein-laminated film (Film B) and SPI/wheat gluten-laminated film (Film C) showed increased tensile strength by 150%, compared to control (Film A). Film C showed significant 253% increase in percentage elongation. Water vapor permeability (WVP) of Films B and C decreased slightly compared to Film A. Solubility values of Films B and C were lower than that of Film A. Hunter color values of Films A and C were not significantly different, while Film B showed yellowness due to presence of corn zein. These results suggest SPI/wheat gluten-laminated film is suitable as packaging material.

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