Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, Uttar Pradesh 247001, India.
Int J Biol Macromol. 2021 Aug 31;185:451-461. doi: 10.1016/j.ijbiomac.2021.06.179. Epub 2021 Jun 30.
An active antioxidant film was fabricated by using polyvinyl alcohol (PVA) and corn starch (ST) and incorporated with and 3, 5, 10, and 20% (v/v) coconut shell extract (CSE) and sepiolite clay (SP) for the first time. The microstructure and physical properties of prepared films were characterized and examined. The addition of sepiolite clay to PVA improved the elongation break 15.57 to 69.24%, and water vapor permeability increased with the addition of CSE. In addition to CSE to films, the antioxidant activity properties of the films were enhanced up to 80%. Further, increasing the amount of CSE slightly affected the color of the active films. The thermal properties of films were enhanced with the addition of CSE and SP. The dispersion of SP in the PVA matrix was affected by an increase in CSE concentration in the PVA matrix. Remarkably, PVA-ST film-based sachets successfully improved the oxidative stability of packaged soybean oil. Our results suggest PVA-ST film containing CSE and sepiolite clay can be utilized as a novel antioxidant packaging material in the food processing industry.
首次使用聚乙烯醇（PVA）和玉米淀粉（ST），并加入 3%、5%、10%和 20%（v/v）椰子壳提取物（CSE）和海泡石粘土（SP），制备了一种活性抗氧化膜。对制备的薄膜的微观结构和物理性能进行了表征和研究。海泡石粘土的加入使 PVA 的断裂伸长率从 15.57%提高到 69.24%，水蒸气透过率随着 CSE 的加入而增加。除了向薄膜中添加 CSE 外，薄膜的抗氧化活性也提高了 80%。此外，随着 CSE 用量的增加，活性薄膜的颜色略有变化。CSE 和 SP 的加入提高了薄膜的热性能。SP 在 PVA 基质中的分散性受到 PVA 基质中 CSE 浓度增加的影响。值得注意的是，PVA-ST 基小袋成功地提高了包装大豆油的氧化稳定性。我们的研究结果表明，含有 CSE 和海泡石粘土的 PVA-ST 薄膜可用作食品加工行业的新型抗氧化包装材料。
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