Łupina Katarzyna, Kowalczyk Dariusz, Kazimierczak Waldemar
Department of Biochemistry and Food Chemistry, Faculty of Food Sciences and Biotechnology, University of Life Sciences in Lublin, Skromna 8, 20-704 Lublin, Poland.
Department of Biomedicine and Environmental Research, Faculty of Natural Sciences and Health, The John Paul II Catholic University of Lublin, Konstantynów 1J, 20-708 Lublin, Poland.
Polymers (Basel). 2022 Sep 24;14(19):4001. doi: 10.3390/polym14194001.
Edible films were obtained from the aqueous binary 75/25 blends of polysaccharides (carboxymethyl cellulose (CMC), gum Arabic (GAR), octenyl succinic anhydride starch (OSA), and water-soluble soy polysaccharides (WSSP)) and gelatin (GEL) supplemented with increasing concentrations (0, 0.25, 0.5, and 1% /) of water-soluble AstaSana (AST) astaxanthin. The AST-loaded films were red and exhibited a grainy microstructure and reduced transparency. The CMC- and WSSP-based films were the best UV-C blockers. After the incorporation of 1% AST, the antiradical activity of the films increased by 1.5 times (~25 percentage points) compared to the controls. The tensile strength (TS) of the CMC-containing films was much higher than those of the other films (36.88-43.04 vs. 2.69-15.62 MPa). AST decreased the TS of the CMC/GEL film (by ~11-14%) but improved the mechanical cohesiveness of the GAR/GEL film (by ~50%). The storage test (at 25 °C and 60 °C, no light access) revealed that the CMC- and GAR-based films exhibited the lowest colour change. Furthermore, at the elevated temperature, the films with higher AST concentration exhibited a better ability to maintain their colour. The WSSP/GEL films were the most prone to darkening and yellowing, possibly due to the Maillard reaction. Moreover, these films had the weakest antiradical activity.
可食用薄膜由多糖（羧甲基纤维素（CMC）、阿拉伯胶（GAR）、辛烯基琥珀酸酐淀粉（OSA）和水溶性大豆多糖（WSSP））与明胶（GEL）的75/25二元水相混合物制成，并添加了浓度不断增加（0、0.25、0.5和1%/）的水溶性AstaSana（AST）虾青素。负载AST的薄膜呈红色，具有颗粒状微观结构且透明度降低。基于CMC和WSSP的薄膜是最佳的紫外线C阻挡剂。加入1%AST后，薄膜的抗自由基活性相比对照提高了1.5倍（约25个百分点）。含CMC薄膜的拉伸强度（TS）远高于其他薄膜（36.88 - 43.04对2.69 - 15.62兆帕）。AST降低了CMC/GEL薄膜的TS（约11 - 14%），但提高了GAR/GEL薄膜的机械内聚性（约50%）。储存试验（在25℃和60℃，无光照射）表明，基于CMC和GAR的薄膜颜色变化最小。此外，在高温下，AST浓度较高的薄膜表现出更好的颜色保持能力。WSSP/GEL薄膜最容易变黑和变黄，可能是由于美拉德反应。而且，这些薄膜的抗自由基活性最弱。
