He Kaiwen, Sheng Wenyang, Yang Li, Yang Yicheng, Tang Tingting, Wang Chenzhi, Jiang Guangyang, Tian Yongqiang
College of Biomass Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China.
Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu 610065, China.
Foods. 2024 Aug 20;13(16):2602. doi: 10.3390/foods13162602.
In this study, a zein-stabilized lemon essential oil Pickering emulsion (ZLPE) was incorporated into a carboxymethyl cellulose/gelatin (CMC/GL) composite film to develop a bio-based packaging material with bioactive properties. The average droplet size of the ZLPE was measured at 3.62 ± 0.08 μm, with a zeta potential of -31.33 ± 0.32 mV, highlighting its excellent stability. The image results of confocal laser microscopy and scanning electron microscopy validated the uniform distribution of ZLPE in the film. The incorporation of ZLPE reduced the water solubility of films by 45.90% and decreased its water vapor permeability by 22.61%, thereby enhancing its hydrophobicity. Additionally, the ZLPE-loaded film improved mechanical properties, enhanced UV-blocking capabilities, and increased thermal stability. The introduction of ZLPE led to the antioxidant activity of the CMC/GL film increasing by six times the original level and endowed it with outstanding antibacterial properties. As a result, cherries packaged with the ZLPE film demonstrated superior preservation performance and extended shelf life in the preservation experiment, exhibiting the film's potential as a food packaging material.
在本研究中，将玉米醇溶蛋白稳定的柠檬精油皮克林乳液（ZLPE）掺入羧甲基纤维素/明胶（CMC/GL）复合膜中，以开发一种具有生物活性的生物基包装材料。测得ZLPE的平均液滴尺寸为3.62±0.08μm，ζ电位为-31.33±0.32mV，突出了其优异的稳定性。共聚焦激光显微镜和扫描电子显微镜的图像结果证实了ZLPE在膜中的均匀分布。ZLPE的掺入使膜的水溶性降低了45.90%，水蒸气透过率降低了22.61%，从而提高了其疏水性。此外，负载ZLPE的膜改善了机械性能，增强了紫外线阻挡能力，并提高了热稳定性。ZLPE的引入使CMC/GL膜的抗氧化活性提高到原来的六倍，并赋予其出色的抗菌性能。因此，在保鲜实验中，用ZLPE膜包装的樱桃表现出优异的保鲜性能并延长了保质期，展示了该膜作为食品包装材料的潜力。
