摘要
以甲基纤维素(MC)和聚乙烯醇(PVA)为复合膜基材,纳米银(AgNPs)为抑菌剂,甘油为增塑剂,制备具有抑菌作用的AgNPs@PVA/MC复合膜。通过考察不同质量分数(0%、0.05%、0.1%、0.2%、0.3%)AgNPs对复合膜的性能影响并对其外观、机械性能、微观结构及抑菌性等性能进行表征,为开发瓯柑贮藏保鲜材料提供理论支撑。结果表明,随着AgNPs含量增加,复合膜对桔青霉生长的抑制作用越显著(P<0.05)。其中,0.1%AgNPs含量的复合膜综合性能最为优异,其抗拉强度达到12.45 MPa、断裂伸长率为6.47%、水蒸气透过率为21.03×10^(-6)g·mm/(m^(2)·s·Pa)、氧气透过率为2.31×10^(-6)cm^(3)/(cm^(2)·s·Pa),扫描电子显微镜显示其横截面具有规则、紧密及分布均匀的AgNPs颗粒,红外光谱及热重分析表明其具有良好的结合性和热稳定性。0.1%AgNPs@PVA/MC复合膜可有效减小瓯柑贮藏期间失重率,降低可溶性固形物、可滴定酸及VC的消耗速率,延缓瓯柑的成熟并显著抑制致腐菌桔青霉的生长,能较好地保持瓯柑贮藏期品质,为瓯柑产业的可持续发展提供支撑。
The antibacterial AgNPs@PVA/MC composite films were prepared by using methyl cellulose(MC)and polyvinyl alcohol(PVA)as composite substrate,nanosilver(AgNPs)as antibacterial agent,and glycerin as plasticizer.The effects of different mass fractions(0%,0.05%,0.1%,0.2%,0.3%)of AgNPs on the properties of the composite films were investigated,and its appearance,mechanical properties,microstructure and antibacterial properties were characterized,in order to provide theoretical support for the development of preservation materials for storing Ougan.The results showed that as the content of AgNPs increased,the inhibitory effect of the composite film on the growth of Penicillium citrinum became more significant(P<0.05).Among them,the composite film with 0.1%AgNPs content had the best comprehensive performance,its tensile strength reached 12.45 MPa,elongation at break was 6.47%,water vapor permeability was 21.03×10^(-6)g·mm/(m^(2)·s·Pa),and oxygen permeability was 2.31×10^(-6)cm^(3)/(cm^(2)·s·Pa).Scanning electron microscopy(SEM)showed that composite film with 0.1%AgNPs content was regular,compact and evenly distributed in cross section.Infrared spectroscopy and thermogravimetric analysis showed that composite film with 0.1%AgNPs content had good bonding and thermal stability.0.1%AgNPs@PVA/MC composite film could effectively reduce the weight loss rate of Ougan during storage,and reduce the consumption rate of soluble solid,titratable acid and VC,delay the maturation of Ougan and significantly inhibit the growth of Penicillium citrinum,which could better maintain the quality of Ougan during the storage period,this study provided support for the sustainable development of Ougan industry.
作者
代帅帅
吴伟杰
房祥军
陈杭君
黄俊
刘瑞玲
陈慧芝
牛犇
郜海燕
DAI Shuaishuai;WU Weijie;FANG Xiangjun;CHEN Hangjun;HUANG Jun;LIU Ruiling;CHEN Huizhi;NIU Ben;GAO Haiyan(School of Biological&Chemical Engineering,Zhejiang University of Science&Technology,Hangzhou 310023,China;Institute of Food Science,Zhejiang Academy of Agricultural Sciences,Key Laboratory of Post-Harvest Fruit Processing,Key Laboratory of Post-Harvest Vegetable Preservation and Processing,Ministry of Agriculture and Rural Affairs,Zhejiang Key Laboratory of Intelligent Food Logistic and Processing,Key Laboratory of Light Industry Fruit and Vegetable Preservation and Processing,Hangzhou 310021,China;State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products,Hangzhou 310021,China)
出处
《食品工业科技》
CAS
北大核心
2025年第1期349-358,共10页
Science and Technology of Food Industry
基金
十四五国家重点研发计划项目(2021YFD2100505)
温州市环大罗山省级现代农业园区科技支撑项目(WZDLS2021-17)。
关键词
瓯柑
复合膜
纳米银
甲基纤维素
聚乙烯醇
贮藏
品质
Ougan(Citrus reticulata cv.Suavissima)
composite film
nanosilver
methyl cellulose
polyvinyl alcohol
storage
quality
