Ren Hongyi, Li Shengzi, Ding Keying, Wang Yan, Zhan Qiping, Zheng Yonghua, Wu Zhengguo, Jin Peng
College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
Int J Biol Macromol. 2024 Dec;282(Pt 2):136898. doi: 10.1016/j.ijbiomac.2024.136898. Epub 2024 Oct 26.
After harvest, fruits and vegetables go through the stages of storage, transportation and sales, and how to regulate the role of preservative in different stages is an urgent problem to be solved. Herein, chitosan-stearic acid is synthesized, then interacting with trans-2-hexenal (E2H) to prepare nanoclusters. Subsequently, the temperature-sensitive liposomes were designed to encase E2H by using the special temperature-responsive open-chain phospholipids, and then combined with chitosan to obtain chitosan-based coating film for peach preservation. The thermosensitive liposomes were uniformly distributed, highly dispersed and spherical, which has excellent temperature response characteristics, and the release of active substances could be regulated in the temperature range of 10 °C-40 °C to achieve the effect of on-demand release. In addition, thermosensitive liposomes also have excellent antioxidant and antibacterial activities. Therefore, the obtained chitosan-based coating could maintain the freshness of peaches, improve the quality and extend the storage period of peaches. The edible chitosan coating and active preservative prepared in this study have potential application value in responsive intelligent active packaging.
收获后，水果和蔬菜要经历储存、运输和销售阶段，如何在不同阶段调控防腐剂的作用是亟待解决的问题。在此，合成壳聚糖-硬脂酸，然后使其与反式-2-己烯醛（E2H）相互作用制备纳米簇。随后，利用特殊的温度响应性开链磷脂设计温度敏感脂质体来包裹E2H，再与壳聚糖结合得到用于桃子保鲜的壳聚糖基涂膜。热敏脂质体均匀分布、高度分散且呈球形，具有优异的温度响应特性，能在10℃至40℃温度范围内调控活性物质的释放，实现按需释放的效果。此外，热敏脂质体还具有优异的抗氧化和抗菌活性。因此，所制备的壳聚糖基涂膜可保持桃子的新鲜度，提高桃子品质并延长其储存期。本研究制备的可食用壳聚糖涂膜和活性防腐剂在响应型智能活性包装中具有潜在应用价值。
