Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey.
Necmettin Erbakan University, Department of Molecular Biology and Genetics, Konya, Turkey.
Int J Biol Macromol. 2022 Sep 30;217:470-480. doi: 10.1016/j.ijbiomac.2022.07.073. Epub 2022 Jul 12.
Chitosan films containing aqueous extracts of sage and rosemary were prepared as a potential food coating material with antioxidant and antibacterial properties. The effect of adding extracts at different concentrations on the mechanical, physical, and optical properties of the films was investigated. The addition of the extracts significantly increased Young's modulus values of the films compared to the chitosan film, and a significant decrease was observed in the swelling percentage and water vapor permeability of the films. Since all the prepared films were ionically cross-linked, the increase in water solubility of the films with the addition of the extract was at a low level. The release of rosmarinic acid, which is found in significant amounts in both plants, from the films was monitored by the capillary electrophoresis. The antioxidant properties imparted to the films by the addition of plant extracts were determined by DPPH and FRAP methods. The addition of plant extracts increased the antimicrobial property of chitosan films against Staphylococcus aureus and Escherichia coli. Films containing sage and rosemary extracts showed potential for use as food coating materials.
壳聚糖薄膜中含有鼠尾草和迷迭香的水提物，可作为具有抗氧化和抗菌性能的潜在食品涂层材料。研究了在不同浓度下添加提取物对薄膜的机械、物理和光学性能的影响。与壳聚糖薄膜相比，添加提取物显著增加了薄膜的杨氏模量值，同时薄膜的溶胀率和水蒸气透过率显著降低。由于所有制备的薄膜都是离子交联的，因此随着提取物的添加，薄膜的水溶性增加水平较低。通过毛细管电泳监测从薄膜中释放出大量存在于两种植物中的迷迭香酸。通过 DPPH 和 FRAP 方法测定了添加植物提取物赋予薄膜的抗氧化性能。添加植物提取物提高了壳聚糖薄膜对金黄色葡萄球菌和大肠杆菌的抗菌性能。含有鼠尾草和迷迭香提取物的薄膜具有作为食品涂层材料的潜力。
