在这项研究中,使用壳聚糖和明胶衍生的聚电解质复合物开发了生物基薄膜,用于包装鱼油。为了进一步增强抗氧化功能,这些薄膜富含没食子酸和橙色精油,无论是单独或组合。最初,这些薄膜的物理化学特征,光学,表面,和屏障属性。随后,评估了薄膜的酚类化合物和抗氧化能力。最后,这些薄膜作为包装鱼油的抗氧化剂盖子进行了测试,然后在环境温度下储存30天,定期监测石油氧化参数。这项研究表明,包括没食子酸引起的可能的交联效应,水分含量的变化证明了这一点,溶解度,和液体吸收。此外,FTIR光谱带的变化表明橙色精油中的没食子酸和/或酚与CSGEL聚合物链的结合,胶片着色有明显的变化。值得注意的是,含有没食子酸的薄膜表现出增强的紫外线阻隔性能,这对于保存紫外线可降解的食品化合物至关重要。此外,含有没食子酸的制剂表现出降低的水蒸气渗透性,而含有橙色精油的样品具有较低的CO2渗透性水平。重要的是,含有没食子酸和精油的配方显示出协同作用和显着的抗氧化能力,具有显著的DPPH抑制率高达88%。在30天的储存期间,鱼油经历了逐渐氧化,如对照样品中K232值增加所示。然而,含有没食子酸或橙色精油作为活性抗氧化剂的薄膜,甚至用作间接食物接触,有效地延缓了氧化,强调他们的保护作用。这项研究强调了可持续生物基薄膜作为食用鱼油或新鲜鱼类的天然抗氧化剂包装的潜力,提供了一个有前途的工具,以提高食品保存,同时减少其浪费。
In this research, bio-based films were developed using polyelectrolyte complexes derived from chitosan and gelatin for packaging fish oil. To further enhance the antioxidant functionality, the films were enriched with gallic acid and orange essential oils, either individually or in combination. Initially, the films were characterized for their physico-chemical, optical, surface, and barrier properties. Subsequently, the phenolic compounds and antioxidant capacity of the films were assessed. Finally, the films were tested as antioxidant cover lids for packaging fish oil, which was then stored at ambient temperature for 30 days, with periodical monitoring of oil oxidation parameters. This study revealed that the inclusion of gallic acid-induced possible crosslinking effects, as evidenced by changes in moisture content, solubility, and liquid absorption. Additionally, shifts in the FTIR spectral bands suggested the binding of gallic acid and/or phenols in orange essential oils to CSGEL polymer chains, with noticeable alterations in film coloration. Notably, films containing gallic acid exhibited enhanced UV barrier properties crucial for preserving UV-degradable food compounds. Moreover, formulations with gallic acid demonstrated decreased water vapor permeability, while samples containing orange essential oils had lower CO2 permeability levels. Importantly, formulations containing both gallic acid and essential oils showed a synergistic effect and a significant antioxidant capacity, with remarkable DPPH inhibition rates of up to 88%. During the 30-day storage period, fish oil experienced progressive oxidation, as indicated by an increase in the K232 value in control samples. However, films incorporating gallic acid or orange essential oils as active antioxidants, even used as indirect food contact, effectively delayed the oxidation, highlighting their protective benefits. This study underscores the potential of sustainable bio-based films as natural antioxidant packaging for edible fish oil or fresh fish, offering a promising tool for enhancing food preservation while reducing its waste.