在这项研究中,将沙棘多糖(SBP)作为功能性物质添加到壳聚糖(CS)中,采用流延法制备了壳聚糖/沙棘多糖(SCS)复合膜。SBP的加入对光学性质的影响,物理性质,机械性能,结构,抗氧化活性,并对SCS复合膜的抗菌活性进行了研究,并将制备的SCS复合膜用于保存黄色樱桃番茄。结果表明,SCS复合薄膜具有良好的抗紫外线性能,水溶性,和抗氧化活性,但是它的明显结构,疏水性,和机械性能需要进一步改善。同时,SBP对8个实验菌株均有抑制作用。此外,添加200mg/LSBP的SCS复合膜可以降低黄樱桃番茄的失重率,保持硬度,延迟总可溶性固形物的减少,可滴定酸,和维生素C含量,并抑制丙二醛的积累。SCS复合膜有利于提高黄樱桃番茄的贮藏品质,及其在果蔬保鲜中的应用具有发展前景。
In this study, sea buckthorn polysaccharides (SBP) were added as functional substances to chitosan (CS), and chitosan/sea buckthorn polysaccharide (SCS) composite films were prepared using the casting method. The effects of SBP addition on the optical properties, physical properties, mechanical properties, structure, antioxidant activity, and antibacterial activity of the SCS composite films were studied, and the prepared SCS composite films were used to preserve yellow cherry tomatoes. The results showed that SCS composite films exhibited good UV resistance, water solubility, and antioxidant activity, but its apparent structure, hydrophobicity, and mechanical properties needed further improvement. Meanwhile, SBP has inhibitory effects on all 8 experimental strains. In addition, the SCS composite
film with the addition of 200 mg/L SBP could reduce the weight loss rate of yellow cherry tomatoes, maintain hardness, delay the decrease of total soluble solids, titratable acid, and Vitamin C content, and inhibit the accumulation of malondialdehyde. SCS composite films are beneficial for enhancing the quality of yellow cherry tomatoes during storage, and their application in fruit and vegetable preservation has development prospects.