School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410007, China.
Int J Biol Macromol. 2022 Jul 1;212:155-164. doi: 10.1016/j.ijbiomac.2022.05.121. Epub 2022 May 21.
This study aimed to prepare edible films with cassava starch (CS) and sodium carboxymethyl cellulose (CMC) as basic raw materials and apple polyphenol (AP) as biologically active components. The addition of AP makes the flexibility of the film increase first and then decrease while the tensile strength decreases slightly and the barrier ability increases significantly. When the AP concentration was 70 mg/mL, the tensile strength of the film decreased from 5.61 ± 0.45 to 3.36 ± 0.19, the water vapor transmittance decreased from 7.17 ± 0.17 to 4.97 ± 0.07 and the peroxide value decreased from 1.896 ± 0.04 to 0.53 ± 0.04. By studying the microstructure of CS/CMC/AP-4 film, it was found that hydrogen bonds were formed between AP, CS, and CMC, and they showed high compatibility, thus improving the crystallinity. On this basis, the roughness of the film decreases and the compactness is enhanced. The increase in compactness is directly related to the increase in blocking ability. At the same time, the improvement of thermal stability is attributed to the increase in crystallinity. In addition, the application of CS/CMC/AP-4 film in chicken preservation also proved its antioxidant potential.
本研究旨在以木薯淀粉（CS）和羧甲基纤维素钠（CMC）为基本原料，以苹果多酚（AP）为生物活性成分，制备可食用薄膜。AP 的添加使薄膜的柔韧性先增加后降低，拉伸强度略有下降，阻隔能力显著提高。当 AP 浓度为 70mg/mL 时，薄膜的拉伸强度从 5.61±0.45 降至 3.36±0.19，水蒸气透过率从 7.17±0.17 降至 4.97±0.07，过氧化物值从 1.896±0.04 降至 0.53±0.04。通过研究 CS/CMC/AP-4 薄膜的微观结构，发现 AP、CS 和 CMC 之间形成了氢键，它们具有很高的相容性，从而提高了结晶度。在此基础上，薄膜的粗糙度降低，致密性增强。致密性的增加与阻隔能力的提高直接相关。同时，热稳定性的提高归因于结晶度的增加。此外，CS/CMC/AP-4 薄膜在鸡肉保鲜中的应用也证明了其抗氧化潜力。
