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Characterization and Preservation Performance of Multilayer Film with Insect Repellent and Antimicrobial Activities for Sliced Wheat Bread Packaging

Authors
Lee, Jung-SooPark, Min A.Yoon, Chan SukNa, Ja HyunHan, Jaejoon
Issue Date
11월-2019
Publisher
WILEY
Keywords
star anise essential oil; thymol; insect repellent; antimicrobial; multilayer film
Citation
JOURNAL OF FOOD SCIENCE, v.84, no.11, pp.3194 - 3203
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF FOOD SCIENCE
Volume
84
Number
11
Start Page
3194
End Page
3203
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/62070
DOI
10.1111/1750-3841.14823
ISSN
0022-1147
Abstract
A multilayer film containing star anise essential oil and thymol coating layers (SAEO and TH, respectively), with insect repellent and antimicrobial properties, has been developed using bar coating and adhesive lamination processes. Our previous study reported the in vitro activities of this polypropylene film (PP)/SAEO/polyethylene terephthalate film (PET)/TH/low-density polyethylene film (LDPE) multilayer film. The current study focused on demonstrating the morphological, optical, and mechanical properties of the film, and evaluating its in vivo activities when used as a bread packaging material. The developed film was 15.03% thicker and 1.86% less transparent than the control film (without active agent coating layers: PP/PET/LDPE). While the color values of the developed film were slightly different from the control film, both films appeared similar to the naked eye. The tensile strength in the developed film was somewhat lower than that of the control film, while both films had statistically comparable values for elongation at break. During storage of sliced bread packaged in the developed film, the film both deterred insects from approaching toward and impeded the growth of microorganisms in the bread. These results suggest the potential applicability of the developed film as an active food packaging material with insect repellent and antimicrobial activities. Practical Application A multilayer film incorporated with insect repellent and antimicrobial coating layers was applied in sliced wheat bread packaging. The developed film effectively inhibited approaches of stored-product insects to packaged bread and growth of microorganisms on the bread surface. It can be used as an active food packaging material that improves the safety and shelf-life of foods.
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