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Physical and antimicrobial properties of zein and methyl cellulose composite films with plasticizers of oleic acid and polyethylene glycol

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机构: [1]Cell Therapy Center, Xuanwu Hospital Capital Medical University, Beijing, China [2]College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
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关键词: Antimicrobial activity Composite film Mechanical property Methyl cellulose Zein

摘要:
Antimicrobial edible films made by biopolymers have potential applications in food packaging. They can reduce environmental pollution and prevent the growth of pathogens. A corn protein, zein, and a derivative of cellulose, methyl cellulose (MC), are selected for making edible packaging films. This study aimed to develop the zein and MC composite films using the selected plasticizers, to characterize the physical properties, and to evaluate the antimicrobial activities after incorporating the essential oil, thymol. Composite films with various zein to MC ratios were prepared using oleic acid and polyethylene glycol (PEG). The chemical bonding formation was analyzed using Fourier transform infrared (FTIR) spectrometry. Mechanical properties of the films were measured. Tensile strength of the zein-MC composite films (45.7 ± 1.3 MPa) was largely improved compared to that of zein films (7.4 ± 0.3 MPa). The maximum elongation of the zein-MC composite films (34.3 ± 4.3 cm/100 cm) was much higher than that of pure MC films (13.47 ± 1.55 cm/100 cm). The incorporation of zein reduced the water vapor permeability and solubility of MC films. Antimicrobial composite films were prepared by adding thymol into the zein-MC composite films, and the films have been proved to be effective against E. coli and S. aureus at the thymol concentrations of 0.15 and 0.2 (g/g), respectively. © 2020 Elsevier Ltd

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出版当年[2020]版:
大类 | 2 区 工程技术
小类 | 2 区 食品科技
最新[2023]版:
大类 | 1 区 农林科学
小类 | 2 区 食品科技
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出版当年[2019]版:
Q1 FOOD SCIENCE & TECHNOLOGY
最新[2023]版:
Q1 FOOD SCIENCE & TECHNOLOGY

影响因子: 最新[2023版] 最新五年平均 出版当年[2019版] 出版当年五年平均 出版前一年[2018版] 出版后一年[2020版]

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第一作者机构: [1]Cell Therapy Center, Xuanwu Hospital Capital Medical University, Beijing, China
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