College of Science, Sichuan Agricultural University, No.46, Xin Kang Road, Ya'an, Sichuan Province 625014, PR China; College of Food Science, Sichuan Agricultural University, No.46, Xin Kang Road, Ya'an, Sichuan Province 625014, PR China.
College of Food Science, Sichuan Agricultural University, No.46, Xin Kang Road, Ya'an, Sichuan Province 625014, PR China.
Int J Biol Macromol. 2023 Jun 15;240:124444. doi: 10.1016/j.ijbiomac.2023.124444. Epub 2023 Apr 14.
The use of non-conventional starch sources to develop biodegradable and bioactive starch-based films have attracted increasing attention recently. In this study, a nonconventional chayote tuber starch (CTS) was functionalized by zein-pectin nanoparticle-stabilized cinnamon essential oil (CEO) Pickering emulsion (ZPCO) to develop a novel bioactive composite films for food packaging application. Results demonstrated that antibacterial ZPCO featuring long-term stability was successfully obtained. FTIR and SEM analyses suggested that ZPCO have favorable dispersibility and compatibility with CTS matrix. With ZPCO increasing, the transmittance, tensile strength, and moisture content of composite films decreased, whereas their elongation at break, antimicrobial and antioxidant activities increased. ZPCO added at an appropriate level (2 %) can improve water-resistance of the films and reduce water vapor permeability. More importantly, ZPCO can achieve a slower sustained-release of CEO from composite films into food simulants. Furthermore, the composite film containing 2 % ZPCO is safe and nontoxic as proved by cell cytotoxicity test, and it can significantly prolong the shelf life of ground beef by showing the lowest total volatile base nitrogen and best acceptable sensory characteristic. Overall, the incorporation of ZPCO into CTS films offers a great potential application as a bioactive material in the food packing.
最近，人们越来越关注利用非常规淀粉源来开发可生物降解和具有生物活性的淀粉基薄膜。在这项研究中，我们通过玉米醇溶蛋白-果胶纳米粒子稳定的肉桂精油（CEO）Pickering 乳液（ZPCO）对一种非常规的佛手瓜块茎淀粉（CTS）进行了功能化，以开发用于食品包装应用的新型生物活性复合薄膜。结果表明，成功获得了具有长期稳定性的抗菌 ZPCO。傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）分析表明，ZPCO 具有良好的分散性和与 CTS 基质的相容性。随着 ZPCO 的增加，复合膜的透光率、拉伸强度和水分含量降低，而其断裂伸长率、抗菌和抗氧化活性增加。在适当的水平（2%）添加 ZPCO 可以提高薄膜的耐水性并降低水蒸气透过率。更重要的是，ZPCO 可以实现 CEO 从复合膜到食品模拟物中的缓慢持续释放。此外，细胞毒性试验证明，含有 2%ZPCO 的复合膜是安全无毒的，并且通过显示最低的总挥发性碱基氮和最佳的可接受的感官特性，可以显著延长碎牛肉的保质期。总的来说，将 ZPCO 掺入 CTS 薄膜中为其在食品包装中的生物活性材料应用提供了巨大的潜力。
