Zhu Lin, Luo Haixi, Shi Zhen-Wei, Lin Chang-Qing, Chen Jian
Key Laboratory of Food Nutrition and Functional Food of Hainan Province Engineering Research Center of Utilization of Tropical Polysaccharide Resources, Ministry of Education, College of Food Science and Engineering, Hainan University, Haikou 570228, China.
Key Laboratory of Medicinal and Edible Plant Resources of Hainan Province, Hainan Vocational University of Science and Technology, Haikou 571126, China.
Food Chem X. 2023 Feb 23;17:100602. doi: 10.1016/j.fochx.2023.100602. eCollection 2023 Mar 30.
There are several problems with common starch films, including strong water absorption and poor mechanical properties. To create a better starch film, octenyl succinate cassava starch ester (OSCS) was first blended with chitosan and nano ZnO to prepare an OSCS/CS/ZnO film. Then, the film was supplemented with different concentrations of ε-PL as a bacteriostatic agent to prepare a film that would resist bacterial invasion. The mechanical properties, barrier properties, optical properties, and color of the modified starch antibacterial films were investigated, and finally the antibacterial properties and cytotoxicity were tested. The results demonstrated that the modified starch antibacterial film had good mechanical properties, improved surface hydrophobicity, and had a UV-blocking effect. The modified starch antibacterial film with ε-PL of 8% had stable and long-lasting antibacterial properties, stable release, and good cytocompatibility. An active packaging material was successfully prepared using ε-PL and had a strong preservative effect on food.
普通淀粉膜存在几个问题，包括吸水性强和机械性能差。为了制备性能更好的淀粉膜，首先将辛烯基琥珀酸木薯淀粉酯（OSCS）与壳聚糖和纳米氧化锌混合，制备了OSCS/CS/ZnO膜。然后，向该膜中添加不同浓度的ε-聚赖氨酸作为抑菌剂，制备出能抵抗细菌入侵的膜。研究了改性淀粉抗菌膜的机械性能、阻隔性能、光学性能和颜色，最后测试了其抗菌性能和细胞毒性。结果表明，改性淀粉抗菌膜具有良好的机械性能，表面疏水性得到改善，并且具有紫外线阻隔效果。含8%ε-聚赖氨酸的改性淀粉抗菌膜具有稳定持久的抗菌性能、缓释性能和良好的细胞相容性。利用ε-聚赖氨酸成功制备了一种活性包装材料，对食品具有很强的保鲜作用。
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