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Chitosan 첨가가 Poly(3-hydroxybutyric acid) 필름의 물리적 특성 및 결정구조에 미치는 영향

Effects of Chitosan Addition on Physical Properties and Crystallization of Poly(3-hydroxybutyric acid) Film

  • 김미라 (경북대학교 식품영양학과) ;
  • 구진경 (경북대학교 식품영양학과)
  • 발행 : 2002.06.01

초록

분해성 천연 고분자인 PHB와 chitosan을 블렌드하여 필름을 제조한뒤 필름의 결정특성 및 물리적 성질을 측정한 결과 PHB/chitosan 필름의 X선 회절도 측정에서 상대 결정화도는 chitosan의 함량이 증가할수록 낮아졌으며 FT-lR 측정에서는 chitosan 비율이 증가할수록 PHB의 carbonyl기 의 피크가 작아졌다. DSC측정에 의한 필름의 열적 특성에서는chitosan의 첨가로 인해 열안정성과 결정성이 낮아지는 경향을 보였다. 시차주사현미경을 이용하여 관찰한 필름의 표면상태에서는 chitosan의 비율이 증가할수록 입자크기가 감소하는 것으로 나타났다. 필름의 물성은 PHB에 대한 chitosan의 함량이 증가할수록 인장강도와 신장률이 증가하여 chitosan 첨가로 인해 필름의 물성이 향상된 것을 알 수 있었다. PHB/chitosan필름의 색도 측정 결과 PHB에 chitosan의 함량이 증가할수록 L값과 b값은 낮아지고 필름의 투명도는 높아졌다.

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피인용 문헌

  1. Gas and Lipid Permeabilities and Biodegradability of Poly(3-Hydroxybutyric Acid)/Chitosan Blend Film vol.33, pp.7, 2004, https://doi.org/10.3746/jkfn.2004.33.7.1224