School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Zhejiang Provincial Key Laboratory of Chemical and Biological Processing Technology of Farm Products, Zhejiang, Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, Hangzhou 310023, China.
School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Zhejiang Provincial Key Laboratory of Chemical and Biological Processing Technology of Farm Products, Zhejiang, Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, Hangzhou 310023, China; Hangzhou FoodSci Agricultural Technology Co., Ltd, Hangzhou 310051, China.
Food Chem. 2025 Jan 15;463(Pt 3):141429. doi: 10.1016/j.foodchem.2024.141429. Epub 2024 Sep 24.
The objective of this study was to develop a bio-nanocomposite coating (CQSC) by combining chitosan quaternary ammonium salt (CQAS) and sericin (SC) with biomass-derived carbon dots (CDs) to extend the shelf life of Chinese flowering cabbage (CFC). The effects of different concentrations of CDs (0.2, 0.4, 0.6, 0.8, and 1.0 mg/mL) on the physicochemical, structural, and functional activity of nanocomposite particles were evaluated. CQAS exhibited strong inhibitory effects against Escherichia coli and Bacillus subtilis. Moreover, the application of CQSC on CFC significantly reduced mass losses, slowed the increase in lignin content, maintained ascorbic acid and chlorophyll levels, inhibited the growth of microorganisms, and preserved the unique texture and aroma of CFC during storage at 10 °C compared with uncoated CFC. The results will contribute to the further development of CDs coatings to improve the postharvest preservation effect of fruits and vegetables.
本研究旨在通过将壳聚糖季铵盐（CQAS）和丝胶（SC）与生物质衍生碳点（CDs）结合，开发一种生物纳米复合涂层（CQSC），以延长中国结球白菜（CFC）的货架期。评估了不同浓度的 CDs（0.2、0.4、0.6、0.8 和 1.0 mg/mL）对纳米复合颗粒的物理化学、结构和功能活性的影响。CQAS 对大肠杆菌和枯草芽孢杆菌表现出强烈的抑制作用。此外，与未涂层的 CFC 相比，CQSC 在 10°C 下应用于 CFC 可显著减少质量损失，减缓木质素含量的增加，保持抗坏血酸和叶绿素水平，抑制微生物的生长，并保持 CFC 独特的质地和香气。该结果将有助于进一步开发 CDs 涂层，以提高水果和蔬菜的采后保鲜效果。
