State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China.
Institute of Agricultural Products Preservation and Processing Science and Technology, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China; Tianjin Gasin-DH Preservation Technologies Co., Ltd, Tianjin 300403, China.
Food Chem. 2023 Jan 30;400:134100. doi: 10.1016/j.foodchem.2022.134100. Epub 2022 Sep 5.
Poly (butylene adipate-co-terephthalate) (PBAT)/polylactic acid (PLA) blended with compatibilizers (polycaprolactone, PCL; poly (ethylene glycol), PEG; titanium dioxide, nano-TiO) (TP@PLA composites) were developed by melt processing. Natamycin incorporated into TP@PLA blend composites formed NTP@PLA films, which exhibited high tensile strength (24.1-43.5 MPa) and elongation at break (85.8-258.2 %), and exhibited good oxygen permeability, water vapor permeability, surface hydrophobicity and biodegradability. The in vitro results revealed that inhibition of Penicillium expansum cell growth of the NTP@PLA films with addition of 1.0 wt% natamycin reached 95.72 %. The NTP@PLA film with natamycin effectively reduced incidence of decay (1.52 %) on grapes, maintained their quality, and inhibited the growth of pathogenic fungi to up to 0.42 log cfu·g. This study generates new insights into the preservation properties of antimicrobial NTP@PLA film, which endow it with great application potential as a novel and eco-friendly packaging material for the food industry.
聚己二酸/对苯二甲酸丁二醇酯（PBAT）/聚乳酸（PLA）与增容剂（聚己内酯，PCL；聚乙二醇，PEG；二氧化钛，纳米-TiO）（TP@PLA 复合材料）通过熔融加工开发。将纳他霉素掺入 TP@PLA 共混复合材料中形成 NTP@PLA 薄膜，其表现出高拉伸强度（24.1-43.5 MPa）和断裂伸长率（85.8-258.2%），并表现出良好的氧气透过性、水蒸气透过性、表面疏水性和生物降解性。体外结果表明，添加 1.0 wt%纳他霉素的 NTP@PLA 薄膜对扩展青霉细胞生长的抑制率达到 95.72%。含纳他霉素的 NTP@PLA 薄膜有效降低了葡萄腐烂的发生率（1.52%），保持了葡萄的品质，并将致病真菌的生长抑制率提高到 0.42 log cfu·g。这项研究为具有抗菌性能的 NTP@PLA 薄膜的保鲜性能提供了新的见解，使其作为一种新型环保的食品工业包装材料具有巨大的应用潜力。
