聚乙烯醇/纳米纤维素/石榴皮多酚复合抗菌薄膜性能研究  

Study on properties of polyvinyl alcohol/nanocellulose/pomegranatepeel polyphenol composite antibacterial films

作　　者：李慧[1] 田家瑶 庞姗姗 龚国利 LI Hui;TIAN Jia-yao;PANG Shan-shan;GONG Guo-li(School of Art and Design,Shaanxi University of Science&Technology,Xi an,Shaanxi 710021,China;School of Food and Bioengineering,Shaanxi University of Science&Technology,Xi an,Shaanxi 710021,China)

机构地区：[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

出　　处：《食品与机械》2023年第4期103-109,177,共8页Food and Machinery

基　　金：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)。

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。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.

关 键 词：石榴皮多酚 聚乙烯醇 纳米纤维素晶体 抗氧化 抗菌复合薄膜 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TS206.4[轻工技术与工程—食品科学]