改性壳聚糖/百里香精油复合涂膜对荔枝保鲜效果的影响  

Preservation Effect of Modified Chitosan/Thyme Essential Oil Composite Coating on Litchi

作　　者：张映杭 刘运浩 周闯 侯佳佳 杨子明 王超 何祖宇 李普旺 ZHANG Yinghang;LIU Yunhao;ZHOU Chuang;HOU Jiajia;YANG Ziming;WANG Chao;HE Zuyu;LI Puwang(South Subtropical Crops Research Institute,Chinese Academy of Tropical Agricultural Sciences,Guangdong Zhanjiang 524091,China;College of Food Science and Technology,Huazhong Agricultural University,Wuhan 430070,China;Key Laboratory of Tropical Fruit Biology,Ministry of Agriculture and Rural Affairs,Guangdong Zhanjiang 524091,China;Key Laboratory for Postharvest Physiology and Technology of Tropical Horticultural Products of Hainan Province,Guangdong Zhanjiang 524091,China)

机构地区：[1]中国热带农业科学院南亚热带作物研究所,广东湛江524091 [2]华中农业大学食品科学技术学院,武汉430070 [3]农业农村部热带果树生物学重点实验室,广东湛江524091 [4]海南省热带园艺产品采后生理与保鲜重点实验室,广东湛江524091

出　　处：《包装工程》2024年第23期189-196,共8页Packaging Engineering

基　　金：广东省级乡村振兴战略专项资金科技兴农项目(2023LZ03);中央级公益性科研院所基本科研业务费专项(1630062024025,1630062022006);中国热带农业科学院国家热带农业科学中心科技创新团队项目(CATASCXTD202305);海南省自然科学基金(323MS097,321QN0922)。

摘　　要：目的对壳聚糖进行接枝改性,并与百里香精油复合,探究复合涂膜在荔枝贮藏期间的保鲜效果。方法在活化剂的作用下,对壳聚糖接枝季磷盐和山梨酸,提高其水溶性和抗菌活性,然后与纳米纤维素、百里香精油制备复合膜液,将复合膜液用于荔枝的常温保鲜,对荔枝的pH、质量损失率、维生素C含量、总酚含量、可滴定酸含量、可溶固形物含量等指标进行测试分析,并与超纯水、咪鲜胺、壳聚糖等对照组进行对比,探究复合涂膜对荔枝贮藏品质的影响。结果与对照处理组相比,改性壳聚糖/百里香精油复合涂膜具有较好的阻隔性能,能有效减少荔枝的质量损失,减少水分和营养物质的流失量,抑制霉菌的生长与褐变。结论改性壳聚糖/百里香精油复合涂膜具有保持荔枝质量、延长贮藏货架期的能力,并且涂膜液来源经济,有较高的实用推广性和发展前景,能够实现经济、绿色、高效、持久的保鲜效果。The work aims to graft chitosan and compound it with thyme essential oil and then study the preservation effect of composite coating on litchi during storage.Activator reagents were utilized to graft chitosan with quaternary phosphate salt and sorbic acid to improve its water solubility and antibacterial activity,and then the composite coating solution was prepared with nano cellulose and thyme essential oil.The composite coating solution was used for the preservation of litchi at room temperature,and the pH,weight loss rate,vitamin C content,total phenol content,titratable acid,soluble solids and other indicators of litchi were tested and analyzed.By comparing the composite coating with the control group treated with ultrapure water,prochloraz,chitosan and other methods,the effect of composite coating on the storage quality of litchi was explored.Compared with the control treatment group,the modified chitosan/thyme essential oil composite coating had better barrier performance,which could effectively reduce the weight loss of litchi,reduce the loss of water and nutrients,and inhibit mold growth and browning.The modified chitosan/thyme essential oil composite coating has the ability to maintain the quality of litchi and extend the shelf life of storage,and the coating solution is economical in source,has high practical popularization and development prospects,and achieves economic,green,efficient and lasting preservation effect.

关 键 词：荔枝 改性壳聚糖 百里香精油 涂膜保鲜 

分 类 号：TB484.9[一般工业技术—包装工程]