• Journal of the Korean Wood Science and Technology
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• 제42권4호
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• pp.376-384
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• 2014

본 연구는 가소화 전분필름의 열적 및 강도적 성질에 미치는 두 종류의 나노셀룰로오스, 즉 마이크로피브릴 셀룰로오스(MFC)와 셀룰로오스 나노크리스탈(CNC) 및 아민화전분의 첨가영향을 조사하였다. 글리세롤(23 wt%)을 전분의 가소제로 사용하였으며, 나노셀룰로오스를 각각 1, 5, 10, 30 중량부(phr)를 첨가하여 나노필름을 제조하였다. 나노셀룰로오스의 첨가량이 증가함에 따라 인장강도 및 탄성율은 비례적으로 증가하였으나 신장율은 저하하였다. 또한, MFC 강화필름의 강도적 성질이 CNC 강화필름보다 큰 값을 나타냈다. 제지용 사이즈제로 사용하는 아민화전분의 소량 첨가는 강도적 성질의 향상에 양호한 영향을 미쳤다. MFC 강화 전분나노필름의 TGA에 의한 열적 안정성은 MFC (30 phr)의 첨가에 의하여 향상되었으며, 아민화전분 첨가 나노필름의 경우에도 MFC를 첨가함으로써 향상되었다.

• 한국포장학회지
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• 제29권1호
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• pp.9-14
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• 2023

The application of starch-based films is limited by the poor water vapor barrier and mechanical properties. In this study, plasticized octenyl-succinated corn starch (OTPS) was mixed into Poly (butylene adipate-co-terephthalate) (PBAT) with various concentration (0/0.25/0.5/0.75 wt%) of epoxidized soybean oil (ESO) to enhance the mechanical properties and the hydrophobicity of blends. Tensile Strength and elongation at break of PBAT/OTPS film was slightly strengthened as the added ratio of ESO raised to 0.5 wt%, yet lessened again in 0.75 wt% sample. The yield strength and elastic modulus were highest in 0.25wt% of ESO added. In thermal properties, the melting temperature (T_m) and crystallization temperature (T_c) were highest at ESO 0.25 and the maximum degradation temperature (T_max) of components of the films were developed as ESO added. Also, it has been proved that the addition of hydrophobic substances reduces the hydrophilicity of the film by contact angle. This suggests the use of epoxidized oil for preparing films based on high TPS content allows obtaining enhanced interfacial adhesion. This study confirmed that ESO acts as a compatibilizer between OTPS and PBAT to improve the mechanical properties and hydrophobicity of the sample. The sample containing 0.5wt% of ESO was the most suitable for packaging application.