聚乙烯醇/纳米纤维素/石榴皮多酚复合抗菌薄膜性能研究
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(1. 陕西科技大学设计与艺术学院,陕西 西安 710021;2. 陕西科技大学食品与生物工程学院,陕西 西安 710021)

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李慧(1976—),女,陕西科技大学副教授,硕士生导师,博士。E-mail:lihui@sust.edu.cn

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陕西省科技厅重点项目(编号:2019NY-194);陕西省西安市未央区科技计划项目(编号:202038);陕西省重点研发计划项目(编号:2021NY-124)


Study on properties of polyvinyl alcohol/nanocellulose/pomegranate peel polyphenol composite antibacterial films
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(1. School of Art and Design, Shaanxi University of Science & Technology, Xian, Shaanxi 710021, China; 2. School of Food and Bioengineering, Shaanxi University of Science & Technology, Xian, Shaanxi 710021, China)

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    摘要:

    目的:开发绿色抗菌抗氧化食品包装薄膜。方法:以石榴皮多酚为功能活性物质,采用共混法制备聚乙烯醇/纳米纤维素晶体/石榴皮多酚复合抗菌薄膜,并对其性能进行表征。结果:石榴皮多酚的添加影响了薄膜表面的连续性;当石榴皮多酚添加量为5倍最小抑菌浓度时,薄膜的透水气性增加了28.79%,拉伸强度、断裂伸长率、疏水性及透光率分别降低了44.97%,29.37%,36.36%,22.35%,同时总酚含量为(5.92±0.17) mg/L,DPPH自由基清除率达到(13.31±0.22)%;薄膜表现出良好的抑菌性,对白色念珠菌的抑菌效果最好,其次为金黄色葡萄球菌、大肠杆菌。结论:聚乙烯醇/纳米纤维素晶体/石榴皮多酚复合抗菌薄膜是一种新型活性食品包装材料。

    Abstract:

    Objective: This study aimed to develop a kind of green antibacterial and antioxidant food packaging film. Methods: Polyvinyl alcohol/nanocellulose crystal/pomegranate peel polyphenol composite antibacterial films were prepared by blending method with pomegranate peel polyphenol as functional active substance, and their properties were characterized. Results: The continuity of the film surface was affected by the addition of pomegranate peel polyphenols. When the addition of polyphenols in pomegranate peel was 5 times the minimum bacteriostatic concentration, the water permeability of the film increased by 28.79%, and the tensile strength, elongation at break, hydrophobicity and light transmittance decreased by 44.97%, 29.37%, 36.36% and 22.35%, respectively. The total phenol content was (5.92±0.17) mg/L, and the DPPH radical scavenging rate was (13.31±0.22)%. The film showed good bacteriostasis, and had the best bacteriostasis effect on Candida albicans, followed by Staphylococcus aureus and Escherichia coli. Conclusion: The PVA/CNC/PPE composite antibacterial film has good performance and is a new active food packaging material. composite antibacterial film is a new type of active food packaging material.

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李 慧,田家瑶,庞姗姗,等.聚乙烯醇/纳米纤维素/石榴皮多酚复合抗菌薄膜性能研究[J].食品与机械,2023,39(4):103-109,177.
LI Hui, TIAN Jia-yao, PANG Shan-shan, et al. Study on properties of polyvinyl alcohol/nanocellulose/pomegranate peel polyphenol composite antibacterial films[J]. Food & Machinery,2023,39(4):103-109,177.

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  • 收稿日期:2022-07-24
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  • 在线发布日期: 2023-06-05
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