Harbin Institute of Technology, 92 Xidazhi Road, Nangang District, Harbin 150001, PR China.
School of Life Sciences, Zhengzhou University, Zhengzhou 450001, PR China.
Mater Sci Eng C Mater Biol Appl. 2020 May;110:110721. doi: 10.1016/j.msec.2020.110721. Epub 2020 Feb 3.
The preparation of an antibacterial film is imperative for the preservation and transportation of food. In the present work, we prepared a pullulan derivative/sodium alginate composite film. This composite film exhibited an excellent film-forming ability and water vapor barrier. In addition, with 11% light transmittance in the visible region, this film exhibited worthwhile light barrier properties. Further, the addition of sodium alginate improved the mechanical properties of the composite film (34 MPa). The active amino groups on the pullulan derivative backbone induced antimicrobial activity against both E. coli and S. aureus. This study can provide an essential guideline for the preparation of antibacterial food packaging films in the future.
制备抗菌薄膜对于食品的保存和运输至关重要。在本工作中，我们制备了一种普鲁兰衍生物/海藻酸钠复合薄膜。该复合薄膜具有优异的成膜能力和水蒸气阻隔性能。此外，该薄膜在可见光区具有 11%的透光率，具有有价值的光阻隔性能。此外，海藻酸钠的添加提高了复合薄膜的力学性能（34MPa）。普鲁兰衍生物主链上的活性氨基基团诱导其对大肠杆菌和金黄色葡萄球菌均具有抗菌活性。本研究可为今后制备抗菌食品包装薄膜提供重要的指导。
