Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey.
Piri Reis University, Department of Industrial Engineering, Tuzla, Istanbul, Turkey.
Int J Biol Macromol. 2023 Jul 1;242(Pt 1):124735. doi: 10.1016/j.ijbiomac.2023.124735. Epub 2023 May 10.
Solvent casting following the dissolution of chitosan in aqueous acetic acid is the most widely used method for preparing chitosan films. In this study, an economical and practical way is proposed to improve the physicochemical properties of chitosan films by using vinegar varieties both as solvents and as bioactive additives to improve the properties of the films. Chitosan films were prepared by dissolving chitosan in pomegranate, grape, apple, and hawthorn vinegar. Vinegar contains bioactive phenolics and different organic acids together with acetic acid, depending on the main raw material from which it is obtained. The films' mechanical, optical properties, antioxidant and antimicrobial activities were compared with each other and with the chitosan film prepared by dissolving chitosan in acetic acid. The antioxidant and antimicrobial properties of chitosan films prepared with vinegar increased. The use of vinegar as a solvent increased the UV light barrier properties of the films. Improved antimicrobial, antioxidant, optical, and elastic properties of films prepared by dissolving chitosan in vinegar varieties are promising in applications of these films as potential and economic food packaging materials.
溶剂浇铸法是将壳聚糖溶解在醋酸水溶液中，然后制备壳聚糖薄膜，这是目前最广泛使用的方法。在本研究中，提出了一种经济实用的方法，即用不同种类的食用醋（如石榴醋、葡萄醋、苹果醋和山楂醋）作为溶剂和生物活性添加剂来改善壳聚糖薄膜的物理化学性质。将壳聚糖溶解在石榴醋、葡萄醋、苹果醋和山楂醋中制备壳聚糖薄膜。醋中含有生物活性酚类物质和不同的有机酸，这取决于其主要原料。比较了薄膜的力学、光学性能、抗氧化和抗菌活性，并与溶解在醋酸中的壳聚糖薄膜进行了比较。用醋制备壳聚糖薄膜的抗氧化和抗菌性能得到了提高。使用醋作为溶剂提高了薄膜对紫外光的阻隔性能。用不同种类的醋溶解壳聚糖制备的薄膜具有更好的抗菌、抗氧化、光学和弹性性能，有望作为潜在的经济型食品包装材料得到应用。
