College of Food and Biological Engineering, Jimei University, Xiamen 361021, China.
National R&D Center for Red Alga Processing Technology, Xiamen 361021, China.
Mar Drugs. 2021 Aug 26;19(9):486. doi: 10.3390/md19090486.
In this work, the physicochemical properties of maleic anhydride (MAH)-modified κ-carrageenan (κCar) (MC) were characterized and compared with those of native κ-carrageenan (NC). The Fourier transform infrared spectrum of MC exhibited that κCar was successfully modified. Thermogravimetric analysis indicated that the thermal stability of MC was decreased. When the degree of substitution was 0.032, MC exhibited a low gel strength (759 g/cm), gelling temperature (33.3 °C), and dehydration rate (60.3%). Given the excellent film-forming ability of κCar, MC films were then prepared and were found to have better mechanical and barrier properties (UV and water) than NC films. With regard to optical properties, MC films could completely absorb UV light in the range of 200-236 nm. The water contact angle of MC films was higher than that of NC films. Moreover, the elongation at break increased from 26.9% to 163%. These physicochemical property changes imply that MC can be employed in polysaccharide-based films.
在这项工作中，我们对马来酸酐（MAH）改性角叉菜胶（κCar）（MC）的物理化学性质进行了表征，并与天然角叉菜胶（NC）进行了比较。MC 的傅里叶变换红外光谱表明 κCar 成功地被修饰了。热重分析表明 MC 的热稳定性降低了。当取代度为 0.032 时，MC 的凝胶强度（759 g/cm）、凝胶化温度（33.3°C）和脱水率（60.3%）较低。鉴于 κCar 具有优异的成膜能力，随后制备了 MC 薄膜，并发现其机械和阻隔性能（UV 和水）优于 NC 薄膜。就光学性能而言，MC 薄膜可以完全吸收 200-236nm 范围内的紫外光。MC 薄膜的水接触角高于 NC 薄膜。此外，断裂伸长率从 26.9%增加到 163%。这些物理化学性质的变化表明 MC 可以用于多糖基薄膜。
