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Position: Home > Articles > Preparation of A Nano-structural ZnO/LDPE Antimicrobial Food Packaging Material FOOD SCIENCE 2010,31 (2) 102-105

纳米ZnO/LDPE抗菌食品包装材料研制

作  者：
高艳玲;姜国伟;张少辉
单  位：
上海交通大学农业与生物学院;中国科学院长春应用化学研究所
关键词：
纳米氧化锌;抗菌;食品包装;低密度聚乙烯
摘  要：
以低密度聚乙烯作为食品包装的基材,将活化处理的纳米级ZnO通过融熔共混的方法添加到基材中,再将所得的粒料经过单螺杆挤出机及吹膜机吹塑成薄膜,即制得抗菌型纳米改性聚烯烃复合材料。以大肠杆菌、枯草芽孢杆菌、金黄色葡萄球菌、鼠伤寒沙门氏菌、单核增多性李氏杆菌、铜绿假单胞菌6种食品中常见的污染菌作为测试菌株,在3种不同条件下对其抗菌性能进行测试。结果表明:该材料对其中的4种细菌具有明显的抗菌作用,在自然光、室温下材料的抗菌能力较强;在6种细菌中对枯草芽孢杆菌的抗菌作用最强,其抗菌率在室温且有自然光照射的条件下达到最高值99.99%,在37℃、无光照的条件下最低为95.01%。
译  名：
Preparation of A Nano-structural ZnO/LDPE Antimicrobial Food Packaging Material
作  者：
GAO Yan-ling1,JIANG Guo-wei2,ZHANG Shao-hui1 (1. School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China ; 2. Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)
关键词：
nano-structural ZnO;antimicrobial activity;food packaging;LDPE
摘  要：
A nano-structural ZnO/LDPE antimicrobial food packaging material was developed through the following steps: in the first step, activated nano-structural ZnO was dispersed into low density polyethylene (LDPE), a matrix material, by dissolving-melting-blending technique; in the second step, the resulted particulate polymer composite was blown into film by sequential treatment with a single screw extruder followed by a plastic film blowing machine; and finally the target product was obtained. Six species of common food-contaminating bacteria including Escherichia coliform, Bacillus subtilis, Staphylococcus aureus, Salmonella aertrycke, Listeria monocytogenes and Pseudomonas aeruginosa were used for testing the antimicrobial capability of the material under different illumination conditions: energy-saving lamp light (5 W, (37 ± 1) ℃), darkness (37 ± 1) ℃ and sunlight (20 ± 1) ℃. Results showed that the material had a significant antimicrobial activity against four of the 6 species of food-contaminating bacteria, which was stronger under sunlight than under other illumination conditions. Of all the tested bacterial species, the strongest inhibitory effect against Bacillus subtilis was observed, with a maximum inhibitory rate as high as 99.99% under sunlight illumination and a minimum value of 95.01% in darkness.

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