Cui Haiying, Cheng Qun, Li Changzhu, Chen Xiaochen, Lin Lin
School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410007, China.
Int J Biol Macromol. 2022 May 1;206:750-758. doi: 10.1016/j.ijbiomac.2022.02.181. Epub 2022 Mar 17.
The unsatisfactory cost-to-performance relationship of load-type films has promoted the utilization of bioactive materials with great film-forming properties in recent years. In this work, lily polysaccharide (LP) based edible films functionalized with sodium alginate (SA) and cold plasma (CP) were prepared. The formation of a dense filamentous structure after incorporation with SA significantly enhanced the tensile properties and the barrier properties to water and oxygen. Meanwhile, non-covalent interaction and good compatibility between LP and SA were found. On this basis, CP treatment significantly increased the tensile strength (from 13.73 to 15.82 MPa) (p < 0.05) due to the introduction of nitrogen-containing functionalities and the crosslinking of functional groups on the film surface. Moreover, the CP-modified film (CP/LPF) exhibited a significant improvement in thermal stability, antioxidant property and antibacterial activity. Finally, significant antioxidant and antibacterial effects of CP/LPF were obtained in the application of chicken breast. Based on the promising properties, CP/LPF has great potential to be utilized as eco-friendly active packaging.
近年来，负载型薄膜不尽人意的性价比关系推动了具有出色成膜性能的生物活性材料的应用。在本研究中，制备了用海藻酸钠（SA）和冷等离子体（CP）功能化的基于百合多糖（LP）的可食用薄膜。与SA混合后形成的致密丝状结构显著提高了拉伸性能以及对水和氧气的阻隔性能。同时，发现LP和SA之间存在非共价相互作用且相容性良好。在此基础上，由于含氮官能团的引入以及薄膜表面官能团的交联，CP处理显著提高了拉伸强度（从13.73 MPa提高到15.82 MPa）（p < 0.05）。此外，CP改性薄膜（CP/LPF）在热稳定性、抗氧化性能和抗菌活性方面有显著改善。最后，CP/LPF在鸡胸肉应用中表现出显著的抗氧化和抗菌效果。基于这些良好性能，CP/LPF作为环保型活性包装具有巨大的应用潜力。
