State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China.
State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China.
Food Chem. 2024 Sep 1;451:139440. doi: 10.1016/j.foodchem.2024.139440. Epub 2024 Apr 24.
The preservation of fresh-cut fruits and vegetables has attracted attention to the shelf-life reduction caused by high humidity. Herein, alginate/copper ions cross-linking, in-situ growth and self-assembly techniques of metal-organic frameworks (MOFs) were utilized to prepare a moisture responsive hydrogel bead (HKUST-1@ALG). As the multistage porous structure formation, tea tree essential oil (TTO) load capacity in hydrogel bead (TTO-HKUST-1@ALG) was increased from 6.1% to 21.6%. TTO-HKUST-1@ALG had excellent moisture response performance, and the release rates of TTO increased from 33.89% to 70.98% with moisture increasing from 45% to 95%. Besides, TTO-HKUST-1@ALG exhibited excellent antimicrobial, antioxidant capacity, and biocompatibility. During storage, TTO-HKUST-1@ALG effectively improved the cell membrane integrity by maintaining the balance of reactive oxygen species metabolism. The degradation of cell wall structure and tissue softening were delayed by inhibiting the cell wall-degrading enzymes activity. Briefly, TTO-HKUST-1@ALG improved the storage quality and extended shelf-life of fresh-cut pineapple, which was a promising preservative.
新鲜切割的水果和蔬菜的保鲜引起了人们对高湿度导致货架期缩短的关注。在此，利用海藻酸钠/铜离子交联、原位生长和金属有机框架（MOFs）自组装技术，制备了一种对湿度敏感的水凝胶珠（HKUST-1@ALG）。随着多级多孔结构的形成，水凝胶珠（TTO-HKUST-1@ALG）中茶树精油（TTO）的负载能力从 6.1%增加到 21.6%。TTO-HKUST-1@ALG 具有优异的湿度响应性能，随着湿度从 45%增加到 95%，TTO 的释放率从 33.89%增加到 70.98%。此外，TTO-HKUST-1@ALG 表现出优异的抗菌、抗氧化能力和生物相容性。在贮藏过程中，TTO-HKUST-1@ALG 通过维持活性氧代谢平衡，有效地提高了细胞膜的完整性。通过抑制细胞壁降解酶的活性，延缓了细胞壁结构的降解和组织软化。总之，TTO-HKUST-1@ALG 提高了鲜切菠萝的贮藏品质，延长了货架期，是一种有前途的保鲜剂。
