Journal of the Korean Industrial and Engineering Chemistry, Vol.14, No.8, 1098-1103, December, 2003
전분/펙틴 블렌드 필름의 기계적 물성 및 산소 투과도 연구
A Study on the Mechanical Properties and Oxygen Permeability of Pectin/Starch Blend Film
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초록
생분해성 및 수용성이며 식용 가능한 펙틴/전분 필름을 제조하여 기계적, 열적 특성, 흡습성 및 산소 투과도를 조사하였다. 필름의 인장 강도와 탄성률은 전분의 함량이 증가할수록 감소하였고, 신장률은 거의 영향이 없었다. 가소제 글리세롤의 함량이 증가할수록 인장 강도와 탄성률은 급격히 감소하나, 신장률은 조금 증가하였다. 높은 상대습도에 노출된 필름의 경우 탄성률과 인장 강도는 감소하였고, 신장률은 증가하였다. 흡수율은 글리세롤의 함량에 따라 변하지만, 펙틴/전분 비에 따라서는 큰 변화가 없었다. 펙틴/전분 블렌드 필름의 혐기성 생분해도는 전분의 함량이 증가할수록 증가하였다. 펙틴/전분 블렌드 필름의 산소 투과도는 전분의 함량이 증가할수록 산소투과도는 높아졌으며, 가소제로 사용된 글리세롤의 양이 증가할수록 산소 투과도는 증가하였다.
Mechanical and thermal properties, waterabsorption, and anaerobic biodegradability of pectin/starch blend film were observed. Tensile properties of pectin/starch blend films were strongly affected by the amount of glycerol and the ratio of pectin/starch. Tensile strength and modulus decreased as the content of glycerol increased while, the elongation at break increased. Water absorption of pectin/starch blend films was much affected by the amount of glycerol, where as the effect of pectin/starch content ratio on the water absorption property was not much. Biodegradability of film under anaerobic condition increased with increasing starch content. Oxygen permeability of pectin/starch blend films increased as the contents of starch and glycerol increased.
Keywords:pectin/starch blend film;permeability;mechanical property;water absorption;biodegradability
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