Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland.
Faculty of Biological and Veterinary Science, Nicolaus Copernicus University in Toruń, Lwowska 1, 87-100 Toruń, Poland.
Food Chem. 2022 Apr 16;374:131639. doi: 10.1016/j.foodchem.2021.131639. Epub 2021 Nov 19.
Biodegradable films based on starch modified with ascorbic acid or caffeine and dialdehyde starch (DS) were evaluated towards their applications in the food packaging industry. The morphology of the films surface was observed with SEM and AFM. The chemical structure was examined with ATR-FTIR spectroscopy and X-ray diffraction. The mechanical, thermal and barrier properties of the films were examined. The cross-linking and hydrophobic effect of dialdehyde starch on starch-based films was proven. Vitamin C addition prompts the crystalline structure formation and improves the hydrophilicity and antioxidant activity of the starch blends. Caffeine addition results in higher starch film hydrophobicity, whereas caffeine combined with DS reduces crystalline order in starch. Both caffeine and ascorbic acid incorporation influence the film stiffness, and dialdehyde starch causes an increase in brittleness. The high susceptibility to biodegradation and good antioxidant activity confirms the potential application of examined systems in the packaging industry.
基于用抗坏血酸或咖啡因和双醛淀粉（DS）改性的淀粉的可生物降解薄膜被评估用于食品包装工业中的应用。使用 SEM 和 AFM 观察薄膜表面的形态。使用 ATR-FTIR 光谱和 X 射线衍射检查化学结构。检查了薄膜的机械、热和阻隔性能。证明了双醛淀粉对淀粉基薄膜的交联和疏水性效应。添加维生素 C 会促使形成结晶结构，并提高淀粉共混物的亲水性和抗氧化活性。添加咖啡因会使淀粉薄膜疏水性增加，而咖啡因与 DS 结合则会降低淀粉的结晶有序性。咖啡因和抗坏血酸的掺入都会影响薄膜的刚性，而双醛淀粉会增加脆性。高的生物降解敏感性和良好的抗氧化活性证实了所研究的系统在包装工业中的潜在应用。
