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中国精品科技期刊2020
张猛,王国慧,张欣,等. 高抗菌性聚乙烯醇/Ag@MOF食品包装膜的制备与表征[J]. 食品工业科技,2021,42(23):243−250. doi: 10.13386/j.issn1002-0306.2021040039.
引用本文: 张猛,王国慧,张欣,等. 高抗菌性聚乙烯醇/Ag@MOF食品包装膜的制备与表征[J]. 食品工业科技,2021,42(23):243−250. doi: 10.13386/j.issn1002-0306.2021040039.
ZHANG Meng, WANG Guohui, ZHANG Xin, et al. Fabrication and Characterization of Antibacterial Polyvinyl Alcohol/Ag@MOF Films for Food Packing[J]. Science and Technology of Food Industry, 2021, 42(23): 243−250. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021040039.
Citation: ZHANG Meng, WANG Guohui, ZHANG Xin, et al. Fabrication and Characterization of Antibacterial Polyvinyl Alcohol/Ag@MOF Films for Food Packing[J]. Science and Technology of Food Industry, 2021, 42(23): 243−250. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021040039.

高抗菌性聚乙烯醇/Ag@MOF食品包装膜的制备与表征

Fabrication and Characterization of Antibacterial Polyvinyl Alcohol/Ag@MOF Films for Food Packing

  • 摘要: 为分析银基金属有机框架(Ag@MOF)用于食品包装的可行性,采用流延法制备四种不同的聚乙烯醇(PVA)基食品包装膜(PVA/Ag@MOF、PVA/H2PYDC、PVA/Ag、PVA),并研究它们的力学性能、热力学性能、水阻隔性、抗菌性、细胞毒性等。结果表明,与PVA、PVA/H2PYDC膜相比,Ag@MOF的加入改善了薄膜的力学性能,使薄膜最大拉伸强度提高到36.21 MPa。与PVA、PVA/H2PYDC、PVA/AgNPs膜相比,Ag@MOF的加入增强了膜的热稳定性。与PVA、PVA/H2PYDC膜相比,AgNPs和Ag@MOF的刚性结构防止了水的扩散,提高了阻水性能。PVA/Ag@MOF膜对金黄色葡萄球菌和大肠杆菌的抗菌活性也很好,其抗菌活性远大于AgNPs和H2PYDC复合膜,且具有较低的细胞毒性。因此,PVA/Ag@MOF薄膜是一种很有前景的食品包装材料,可以减少环境微生物对食品的干扰且细胞毒性较低,能够有效提高食品的安全性和储存周期。

     

    Abstract: Four different polyvinyl alcohol (PVA) based food packaging films (PVA/Ag@MOF, PVA/H2PYDC, PVA/Ag, PVA) were prepared by flow-casting method in order to analyze the feasibility of silver based organic framework (Ag@MOF) for food packaging. Their mechanical properties, thermodynamic properties, water barrier, antibacterial and cytotoxicity were studied. The results showed that compared with PVA and PVA/H2PYDC films, the addition of Ag@MOF improved the mechanical properties of the films, and the maximum tensile strength of the films was increased to 36.21 MPa. Compared with PVA, PVA/H2PYDC and PVA/AgNPs films, the addition of Ag@MOF enhanced the thermal stability of the films. Compared with PVA and PVA/H2PYDC films, the rigid structures of AgNPs and Ag@MOF prevented the diffusion of water and improved the performance of water resistance. The antibacterial activity of PVA/Ag@MOF membrane againsted Staphylococcus aureus and Escherichia coli was much higher than that of AgNPs and H2PYDC composite films, and it had low cytotoxicity. Therefore, PVA/Ag@MOF film is a promising food packaging material, which can reduce the interference of environmental microorganisms on food with low cytotoxicity, and improve food safety and storage cycle.

     

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