Polyvinyl alcohol/oregano oil/graphene oxide antibacterial composite film was prepared from PVA and GO by adding OEO as the antibacterial agent. The effect of different OEO contents on the properties of the composite film was studied. The results showed that the OEO improved the performance of the composite film. With the increase of OEO content, the thicknesses were increased, the mechanical properties were improved, and the antibacterial activities were increased. The performances of the film with 1% OEO were the best. The tensile fracture elongation and the tensile strength were 249% and 20.760 MPa, respestively. The diameter of the antibacterial ring of E. coli and L. monocytogenes was 11.70 mm and 12.61 mm, respectively. FTIR revealed that there were chemical bonds among PVA, GO and OEO. SEM showed that OEO made the surface of the composite film smoother. TGA showed that OEO did not affect the coke yield of composite films. DSC indicated that OEO reduced the exothermicity of composite films. The antibacterial properties of natural essential oils were taken advantage of to make the antibacterial composite films, which was beneficial to expand the use of essential oils in packaging films, and provides a reliable reference for other researchers.

中文翻译：

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聚乙烯醇/牛至油/氧化石墨烯复合薄膜的物理，机械，结构和抗菌性能

聚乙烯醇/牛至油/氧化石墨烯抗菌复合膜是通过添加OEO作为抗菌剂，由PVA和GO制备而成。研究了不同OEO含量对复合膜性能的影响。结果表明，OEO提高了复合膜的性能。随着OEO含量的增加，厚度增加，机械性能提高，抗菌活性增加。具有1％OEO的薄膜的性能最佳。拉伸断裂伸长率和拉伸强度分别为249％和20.760MPa。大肠杆菌和单核细胞增生李斯特氏菌抗菌环的直径分别为11.70毫米和12.61毫米。FTIR显示PVA，GO和OEO之间存在化学键。SEM显示，OEO使复合膜的表面更光滑。TGA表明OEO不影响复合膜的焦炭产率。DSC表明OEO降低了复合膜的放热性。利用天然精油的抗菌性能制备了抗菌复合膜，有利于扩大包装膜中精油的使用范围，为其他研究人员提供了可靠的参考。