当前的研究探索了具有高食品质量保证的可生物降解包装材料,由于食物变质主要是由紫外线降解和氧化引起的,这可能会导致不良的风味和营养短缺。因此,将具有抗氧化和抗菌活性的新型多功能氧化锌纳米颗粒/单宁酸(ZnO@TA)以不同的比例(1%,3%,和基于膜的总干重的5%)通过在中性水溶液中的溶液共混方法。此外,ZnO纳米颗粒通过产生过量的活性氧(ROS)而具有独特的抗菌机制,这可能导致病原体对常规抗菌剂的抗性增强。因此,通过开发独特的ROS,可以最大限度地减少由过量ROS引起的负面影响,通过单宁酸与ZnO纳米粒子之间的配位键(ZnO@TA),具有抗氧化潜力的多功能ZnO纳米粒子。ZnO@TA纳米颗粒使用傅里叶变换红外(FTIR)进行检测,X射线衍射(XRD)和扫描电子显微镜(SEM)。ZnO@TA纳米粒子的掺入对屏障的影响,机械,热,抗氧化剂,抗菌,研究了壳聚糖/聚乙烯醇(ZnO@TA@CH/PVA)薄膜的紫外阻隔特性。最低的水蒸气和氧气渗透率和最大的抗氧化能力%为31.98±1.68gmm/m2kPa天,0.144±5.03×10-2c。c/m2。day,和69.35±1.6%,分别,与ZnO@TA(50)@CH/PVA有关。此外,ZnO@TA(50)@CH/PVA薄膜表现出UVB(99.994)的最大紫外屏蔽能力。ZnO@TA(50)@PVA/CH薄膜的拉伸强度和杨氏模量分别为48.72±0.23MPa和2163.46±61.4MPa,分别,比其他薄膜配方。然而,断裂伸长率%表现出最降低的值,为19.62±2.3%。ZnO@TA@CH/PVA薄膜对金黄色葡萄球菌的最大抑制区分别为11±1.0、12.3±0.57和13.6±0.57mm,黄曲霉,和白色念珠菌,分别。根据这些结果,ZnO@TA@CH/PVA薄膜可以长期用于食品保鲜。
The current study explores biodegradable packaging materials that have high food quality assurance, as food deterioration is mostly caused by UV degradation and oxidation, which can result in bad flavor and nutrition shortages. Thus, new multifunctional zinc oxide nanoparticles/tannic acid (ZnO@TA) with antioxidant and antibacterial activities were incorporated into polyvinyl alcohol/chitosan (PVA/CH) composite films with different ratios (1%, 3%, and 5% based on the total dry weight of the film) via a solution blending method in a neutral aqueous solution. Additionally, ZnO nanoparticles have unique antibacterial mechanisms through the generation of excessive reactive oxygen species (ROS) that may lead to intensify pathogen resistance to conventional antibacterial agents. Thus, minimizing the negative effects caused by excessive levels of ROS may be possible by developing unique, multifunctional ZnO nanoparticles with antioxidant potential via coordination bond between tannic acid and ZnO nanoparticles (ZnO@TA). ZnO@TA nanoparticles were examined using Fourier-transform infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The effect of the incorporation of ZnO@TA nanoparticles on the barrier, mechanical, thermal, antioxidant, antimicrobial, and UV blocking characteristics of chitosan/polyvinyl alcohol (ZnO@TA@CH/PVA) films was investigated. The lowest water vapor and oxygen permeability and the maximum antioxidant capacity% are 31.98 ± 1.68 g mm/m2 kPa day, 0.144 ± 5.03 × 10-2 c.c/m2.day, and 69.35 ± 1.6%, respectively, which are related to ZnO@TA(50)@CH/PVA. Furthermore, ZnO@TA(50)@CH/PVA film exhibits the maximum UV shielding capacity of UVB (99.994). ZnO@TA(50) @PVA/CH films displayed better tensile strength and Young`s modulus of 48.72 ± 0.23 MPa and 2163.46 ± 61.4 MPa, respectively, than the other film formulations. However, elongation % at break exhibited the most reduced value of 19.62 ± 2.3%. ZnO@TA@CH/PVA film exhibits the largest inhibition zones of 11 ± 1.0, 12.3 ± 0.57, and 13.6 ± 0.57 mm against Staphylococcus aureus, Aspergillus flavus, and Candida albicans, respectively. In accordance with these results, ZnO@TA@CH/PVA films could be utilized for food preservation for the long-term.