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Enzyme-responsive bacteriostatic fibers loaded with thymol for chilled mutton preservation
Chaoping Jiang1, Ruizhe Zhang2, Yu Hao1
1College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China.
Abstract:
The on-demand release of actives allows for more efficient realization of the food preservation function of active packaging. This research aims to develop an enzyme-responsive active packaging capable of on-demand release of active substances. Fibers were fabricated using polybutylene adipate terephthalate (PBAT) and zein as raw materials through an electrostatic spinning technique. The resulting fibers exhibited desirable physical properties such as water resistance and mechanical strength, meeting the prerequisites for food packaging. In addition, the encapsulation of thymol (THY) endowed the fibers significant antimicrobial activity (99.99 % inhibition against all four microorganisms) and antioxidant capacity (72.24 % scavenging of DPPH radicals). In the presence of bacterial extracellular enzymes, the fibers demonstrated rapid THY release (with a 3-h cumulative release rate exceeding 99 %), confirming the enzyme-responsive nature of the films. Moreover, when applied to chilled mutton, the film effectively extended the shelf life by six days. In conclusion, the enzyme-responsive fibers developed in this study, capable of on-demand release of active substances, provides a valuable reference for future advancements in innovative food packaging.
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