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백송이(Song-Ee Beak),김혜리(Hyeri Kim),송경빈(Kyung Bin Song) 한국식품영양과학회 2017 한국식품영양과학회지 Vol.46 No.3
플라스틱 포장 폐기물로 인한 환경오염을 해결하기 위한 대안으로 생분해성 필름이 많이 연구되어 왔다. 본 연구에서는 우럭 껍질 젤라틴(RFG)과 nano-clay(Cloisite Na<SUP>+</SUP>, 10A)의 복합필름의 특성에 관하여 연구하였다. 우럭 껍질로부터 젤라틴을 추출하여 sorbitol을 가소제로서 첨가한 단백질 필름을 제조하였고, 제조된 RFG 필름의 tensile strength(TS), water vapor permeability(WVP), water solubility(WS)는 각각 15.0 MPa, 2.70×10<SUP>-9</SUP> g m/m<SUP>2</SUP> s Pa, 53.8%였다. RFG에 nano-clay를 첨가한 복합필름은 TS가 증가하고 WVP와 WS는 감소하였다. XRD 분석과 SEM 측정 결과를 통하여 RFG/nano-clay 복합필름 내부에 박리형 구조를 형성함을 확인할 수 있었다. 결론적으로 본 연구 결과 RFG/nano-clay 복합필름은 생분해성 포장재로 적용될 수 있음을 시사한다. To resolve environmental pollution caused by synthetic packaging materials, biodegradable films have been studied as an alternative. In this study, we prepared rockfish skin gelatin (RFG) and nano-clay (Cloisite Na<SUP>+</SUP> and Cloisite 10A) composite films to compare the effects of nano-clay on the physical properties of RFG film. Gelatin was extracted from rockfish skin and used to prepare RFG film with sorbitol as a plasticizer. Tensile strength (TS), water vapor permeability (WVP), and water solubility (WS) of the RFG film were 15.0 MPa, 2.70×10<SUP>-9</SUP> g m/m<SUP>2</SUP> s Pa, and 53.8%, respectively. Addition of nano-clay to the RFG film increased TS and decreased WVP and WS. The X-ray diffraction analysis and scanning electron microscopic results suggest that RFG/nano-clay composite films formed an exfoliated structure. These results indicate that RFG/nano-clay composite films can be applied as biodegradable packaging materials in the food industry.
Development of a hagfish skin gelatin film containing cinnamon bark essential oil
Kim, Hyeri,Beak, Song-Ee,Song, Kyung Bin Elsevier 2018 LWT- Food science and technology Vol.96 No.-
<P><B>Abstract</B></P> <P>Hagfish skin, which is discarded before cooking the fish, can be used as a source of gelatin. In this study, hagfish skin gelatin (HSG) films containing cinnamon-bark essential oil (CBO) were developed as an active packaging material. The SDS-PAGE profile of HSG revealed bands of α and β chains at 130 and 250 kDa, respectively. The HSG films had 30.5 MPa of tensile strength (TS) and 9.18% of elongation at break (E). The addition of 1% CBO to the HSG films resulted in a decrease in the TS and an increase in the E. In addition, the contact angle of the HSG films were changed from 70.9 to 90.5° with the addition of CBO from 0 to 1%. In particular, the HSG films containing 1% CBO had antibacterial and antioxidant activities as well as suitable physical and water barrier properties. Therefore, HSG films containing 1% CBO can be used as food packaging materials to maintain the quality of foods by reducing the risk of microbial spoilage and lipid oxidation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hagfish skin gelatin (HSG) was used to prepare biodegradable films. </LI> <LI> Cinnamon-bark essential oil (CBO) was added as a natural active material. </LI> <LI> HSG films containing CBO had good antibacterial and antioxidant activities. </LI> <LI> Water resistance of the HSG films was enhanced with the addition of 1% CBO. </LI> <LI> HSG films containing CBO can be used as food packaging materials. </LI> </UL> </P>