期刊
FOOD PACKAGING AND SHELF LIFE
卷 33, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.fpsl.2022.100915
关键词
Polylactic acid; Tilapia fish gelatin; ?-cyclodextrin inclusion complex; Active bilayer films; Preservation
资金
- Program of Special Capability Development for Local Colleges and Universities in Shanghai, PR China [19050502000]
- National Key Research and Development Program, PR China [2019YFD0902003]
This study developed active fish gelatin-based bilayer packaging films with improved barrier abilities and antibacterial and antioxidant activities. These films show promising applications in the preservation of seafood.
Most edible films/coatings including those made of gelatin cannot be used independently as packaging films. In this study, active fish gelatin-based bilayer packaging films were developed and applied to preserve Japanese sea bass. The coating method was applied to produce polylactic acid/tilapia fish gelatin-sodium alginate bilayer film (PLA/FGSA). beta-cyclodextrin inclusion complexes of cinnamaldehyde (beta-CD-CI) and thymol (beta-CD-Ty) were added into the gelatin-based layer of the PLA/FGSA to obtain active bilayer films (PLA/FGSA-CI and PLA/FGSA-Ty). This combination improved the oxygen and water vapor barrier abilities of the films, compared with PLA and edible gelatin-based monolayer films. Both active bilayer films possessed strong antibacterial and antioxidant activities. PLA/FGSA-Ty film showed the most effective inhibition against the growth of Pseudomonas.spp and H2S-producing Shewanella, generation of total volatile basic nitrogen (TVB-N) and thiobarbituric acid reactive substances (TBARS) of fish meat. These results indicate the active bilayer films are promising in the preservation of seafood.
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