College of Food Science and Engineering, Inner Mongolia Agricultural University, 306 Zhaowuda Road, Hohhot, Inner Mongolia, 010010, China.
College of Food Science and Engineering, Inner Mongolia Agricultural University, 306 Zhaowuda Road, Hohhot, Inner Mongolia, 010010, China.
Food Chem. 2025 Feb 1;464(Pt 3):141796. doi: 10.1016/j.foodchem.2024.141796. Epub 2024 Oct 28.
Antimicrobial packaging can prolong the shelf life of fresh food, but those active antimicrobial substances may leach into the food and affect its quality. To avoid this phenome, the CC double bond was first incorporated into the chemical structure of polylactic acid (PLLA) and tannic acid (TA) to prepare poly(L-LA-co-butyrate itaconate) (PLBI) and photoactive tannic acid (pTA). Then pTA-grafted PLBI (pTA-g-PLBI) films were fabricated using UV curing technology. Results showed that pTA was successfully grafted onto the surface of PLBI film and formed a uniform layer. The pTA-g-PLBI films exhibited good bacteriostatic effects of 86 %, 90 %, and 96 % on E. coli, P. fluorescens, and S. aureus, respectively. Additionally, pTA-g-PLBI packaging reduced the relative abundance of Shewanella, Psychrobacter, and Pseudomonas in chilled pork and delayed the deterioration of pork for more than 5 days.
抗菌包装可以延长新鲜食品的保质期，但那些活性抗菌物质可能会浸出到食品中，从而影响其质量。为了避免这种现象，首次将 CC 双键引入聚乳酸（PLLA）和单宁酸（TA）的化学结构中，制备了聚（L-丙交酯-co-丁二酸）（PLBI）和光活性单宁酸（pTA）。然后使用紫外光固化技术制备了 pTA 接枝聚乳酸（pTA-g-PLBI）薄膜。结果表明，pTA 成功接枝到 PLBI 薄膜表面并形成均匀的层。pTA-g-PLBI 薄膜对大肠杆菌、荧光假单胞菌和金黄色葡萄球菌的抑菌率分别达到 86%、90%和 96%。此外，pTA-g-PLBI 包装降低了冷藏猪肉中希瓦氏菌属、嗜冷杆菌属和假单胞菌属的相对丰度，并使猪肉的变质延缓了 5 天以上。
