Aydin Gulsum, Zorlu Elif Busra
Biotechnology Department, Faculty of Sciences, Selcuk University, Konya, Turkey.
Waste Biomass Valorization. 2022;13(6):2991-3002. doi: 10.1007/s12649-022-01710-3. Epub 2022 Feb 18.
Composite films were prepared with alginate and roselle extract (HE) at different concentrations (1%, 3%, and 5% w/v) via solvent casting technique and analyzed in terms of physical, mechanical, and antibacterial properties. The incorporation of HE into alginate films resulted in rough and heterogeneous surface characteristics with increasing concentrations of HE. The thickness and water vapor permeability of alginate-HE composite films were significantly higher ( < 0.05) compared to pure alginate films. Moreover, water content, solubility, swelling, tensile strength, and elongation at break value of the composite films decreased ( < 0.05) with increasing concentrations of the extract. FTIR spectra revealed shifts and intensity variations in the composite films and the formation of new peaks suggesting a possible interaction between alginate and HE. Alginate-HE films exhibited good antibacterial activity against Gram-positive ( and ) and Gram-negative ( and ) bacteria. The antibacterial effect of the films, more pronounced against Gram-positive bacteria, increased with higher amounts of HE. The resulting films may be utilised as new biodegradable, antibacterial films in the food packaging industry to prolong shelf life and preserve food safety.
The online version of this article (10.1007/s12649-022-01710-3) contains supplementary material, which is available to authorized users.
通过溶剂浇铸技术制备了不同浓度（1%、3%和5% w/v）的藻酸盐与玫瑰茄提取物（HE）复合薄膜，并对其物理、机械和抗菌性能进行了分析。随着HE浓度的增加，将HE掺入藻酸盐薄膜中会导致表面粗糙且不均匀。与纯藻酸盐薄膜相比，藻酸盐-HE复合薄膜的厚度和水蒸气透过率显著更高（<0.05）。此外，随着提取物浓度的增加，复合薄膜的含水量、溶解度、溶胀度、拉伸强度和断裂伸长率均降低（<0.05）。傅里叶变换红外光谱显示复合薄膜存在位移和强度变化，并形成了新的峰，表明藻酸盐与HE之间可能存在相互作用。藻酸盐-HE薄膜对革兰氏阳性菌（和）和革兰氏阴性菌（和）均表现出良好的抗菌活性。薄膜的抗菌效果对革兰氏阳性菌更为显著，且随着HE含量的增加而增强。所得薄膜可作为新型可生物降解抗菌薄膜用于食品包装行业，以延长保质期并保障食品安全。
本文的在线版本（10.1007/s12649-022-01710-3）包含补充材料，授权用户可获取。
