College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Institute of Intelligent Agriculture Research, School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China.
College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
Int J Biol Macromol. 2021 Jun 30;181:868-876. doi: 10.1016/j.ijbiomac.2021.04.020. Epub 2021 Apr 7.
In this study, starch-based nanocomposite films reinforced by cross-linked starch nanocrystals (CSNCs) were successfully prepared. CSNCs were obtained by cross-linking reaction between starch nanocrystals (SNCs) and sodium hexametaphosphate (SHMP). Through the characterization and comparison of SNCs and CSNCs in microscopic morphology, degree of substitution, swelling degree, XRD spectrum, and FTIR spectrum, the successful progress of the cross-linking reaction was confirmed. Besides, the effects of adding CSNCs on physiochemical properties of the nanocomposite films including mechanical properties, water vapor permeability, and contact angle were studied. The results confirmed that CSNCs had good enhancement effects on the physicochemical properties of starch-based films due to the self-reinforcing effect, and when the CSNCs content reached 10%, the nanocomposite film had the best overall performance. We further evaluated the cytotoxicity of the nanocomposite. Taken together, it is believed that the reported self-reinforced starch-based films are very promising for food packaging and preservation.
本研究成功制备了由交联淀粉纳米晶（CSNCs）增强的淀粉基纳米复合膜。CSNCs 通过淀粉纳米晶（SNCs）与六偏磷酸钠（SHMP）之间的交联反应获得。通过对 SNCs 和 CSNCs 的微观形貌、取代度、溶胀度、XRD 谱和 FTIR 谱的特征和比较，证实了交联反应的顺利进行。此外，还研究了添加 CSNCs 对纳米复合膜物理化学性能的影响，包括力学性能、水蒸气透过性和接触角。结果证实，由于自增强效应，CSNCs 对淀粉基薄膜的物理化学性能具有良好的增强效果，当 CSNCs 含量达到 10%时，纳米复合膜具有最佳的综合性能。我们进一步评估了纳米复合膜的细胞毒性。综上所述，相信所报道的自增强淀粉基薄膜在食品包装和保鲜方面具有广阔的应用前景。
