氮掺杂碳量子点壳聚糖复合膜的制备及对草莓的保鲜效果  

Preparation of nitrogen-doped carbon quantum dots-chitosan composite film and its preservation effect on strawberry

作　　者：张馨月 杨禹诚 段皓月 周杨洁 黄嘉杨 陈梓月 蒋洁 陈姝娟[1] ZHANG Xinyue;YANG Yucheng;DUAN Haoyue;ZHOU Yangjie;HUANG Jiayang;CHEN Ziyue;JIANG Jie;CHEN Shujuan(College of Food Science,Sichuan Agricultural University,Ya'an 625014,Sichuan,China)

机构地区：[1]四川农业大学食品学院,四川雅安625014

出　　处：《浙江农业学报》2023年第12期2935-2943,共9页Acta Agriculturae Zhejiangensis

基　　金：四川省大学生创新创业训练计划(20211062611);成都市科技局技术研发项目(2022-YF05-00487-SN)。

摘　　要：为探究适用于草莓保鲜的安全高效的复合保鲜膜,延长草莓的货架期,以苦笋壳为原料,通过水热法制备氮掺杂碳量子点,将其作为抑菌剂,以壳聚糖为成膜材料,制备复合膜,探究复合膜中氮掺杂碳量子点质量分数对大肠埃希菌、金黄色葡萄球菌的抑菌性能和对草莓贮藏期间各项品质指标的影响。结果表明,制备的氮掺杂碳量子点具有光催化抑菌效果。随着复合膜中氮掺杂碳量子点质量分数的增大,其对大肠埃希菌和金黄色葡萄球菌的抑制作用也逐渐增强。氮掺杂碳量子点壳聚糖复合膜对草莓展现出良好的保鲜效果,能够降低草莓的失重率和腐烂速度,延缓果实可溶性固形物和抗坏血酸等营养物质的消耗和转化,当复合膜中氮掺杂碳量子点的质量分数为5%时,其对草莓的综合保鲜效果最佳。In order to invent a safe and efficient composite film for the preservation of strawberry,which could extend the shelf life,nitrogen-doped carbon quantum dots were prepared by hydrothermal method using bitter bamboo shoots hull as raw material.The prepared nitrogen-doped carbon quantum dots were used as bacterial inhibitor,to produce a composite film with chitosan as the film-forming material.The inhibition effects of the mass fraction of nitrogen-doped carbon quantum dots in the composite film against Escherichia coli and Staphylococcus aureus were investigated as well as the effect on quality indexes during the storage of strawberry.It was shown that the prepared nitrogen-doped carbon quantum dots had photocatalytic inhibition effect,and the inhibition effect against E.coli and S.aureus increased with the increase of mass fraction of nitrogen-doped carbon quantum dots in the composite film.The nitrogen-doped carbon quantum dots-chitosan composite film showed good preservation effects on strawberry,as it could reduce the weight loss and decay rate of strawberry,and delay the consumption and transformation of nutrients such as soluble solids and ascorbic acid in fruits.When the mass fraction of nitrogen-doped carbon quantum dots in the composite film was 5%,its preservation effect was the best under the experiment conditions.

关 键 词：碳量子点 壳聚糖 草莓 复合膜 保鲜 

分 类 号：TS255.36[轻工技术与工程—农产品加工及贮藏工程]