Development of environment-friendly films using natural biopolymers such as carbohydrates has increased because of environmental problems caused by synthetic plastics. This study examined the physical and antioxidative properties of biodegradable films from sword bean starch (SBS) containing goji berry extract (GBE) to develop a novel antioxidant film. As the GBE concentration increased, the tensile strength of the SBS films decreased from 26.32 to 12.42 MPa; however, the elongation at break increased from 7.39 to 12.36%. Although water barrier properties and thermal stability of SBS films were not enhanced by the addition of GBE, ultraviolet/visible light barrier and antioxidant properties were remarkably improved due to its bioactive compounds, specifically zeaxanthin and various polyphenols. In particular, 2,2-diphenyl-1-picrylhydrazyl and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activities of the SBS film with 1.0% GBE were the highest among the films, which were consistent with the total phenolic content results. Therefore, the developed SBS films with GBE are applicable as new antioxidant films in the food packaging industry.

由于合成塑料引起的环境问题，使用天然生物聚合物如碳水化合物的环保薄膜的开发已经增加。这项研究检查了含有枸杞提取物（GBE）的剑豆淀粉（SBS）可生物降解膜的物理和抗氧化性能，以开发出新型抗氧化膜。随着GBE浓度的增加，SBS薄膜的拉伸强度从26.32 MPa降低至12.42 MPa；但是，断裂伸长率从7.39增加到12.36％。尽管通过添加GBE不能增强SBS膜的阻水性能和热稳定性，但由于其生物活性化合物（特别是玉米黄质和各种多酚），紫外线/可见光阻隔性能和抗氧化性能得到了显着改善。特别是2,2-二苯基-1-吡啶并肼基和2，GBE为1.0％的SBS薄膜的2'-叠氮基双（3-乙基苯并噻唑啉-6-磺酸）自由基清除活性最高，与总酚含量结果一致。因此，已开发的具有GBE的SBS薄膜可用作食品包装行业中的新型抗氧化剂薄膜。