Whey protein-coated high oxygen barrier multilayer films using surface pretreated PET substrate
- Authors
- Joo, Eunmi; Chang, Yoonjee; Choi, Inyoung; Lee, Seul Bi; Kim, Dong Hoo; Choi, Young Ju; Yoon, Chan Suk; Han, Jaejoon
- Issue Date
- 7월-2018
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Whey protein; Multilayer film; Surface coating; Corona discharge; Plasma
- Citation
- FOOD HYDROCOLLOIDS, v.80, pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- FOOD HYDROCOLLOIDS
- Volume
- 80
- Start Page
- 1
- End Page
- 7
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/74441
- DOI
- 10.1016/j.foodhyd.2018.01.027
- ISSN
- 0268-005X
- Abstract
- Whey protein isolate (WPI)-coated multilayer films were developed using polyethylene terephthalate (PET) film as a substrate. To improve the interfacial compatibility between PET film and water-based WPI coating solution, various surface pretreatments (corona discharge, plasma, and primer coating) were applied to PET. Water contact angles of the plasma-treated PET were significantly decreased by 12.8% related to the untreated PET, suggesting an increment of hydrophilic functional groups. Oxygen transmission rates of surface-pretreated multilayer films with WPI coating layer [PET/WPI/nylon/linear low-density polyethylene (LLDPE)] were significantly lower, about 43-234 times, than the multilayer films without WPI film layer. In addition, tensile strength of the plasma-pretreated PET/WPI/nylon/LLDPE films was 13.4 and 21.8% higher, elongation at break was 29.7 and 2.6% higher than the corona discharge- and primer-pretreated films, respectively. Taken together, WPI films are promising candidates for replacing synthetic oxygen-barrier materials. Specifically, plasma-pretreated PET/WPI/nylon/LLDPE films have a high potential as high oxygen-barrier packaging materials. (C) 2018 Elsevier Ltd. All rights reserved.
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Collections - Graduate School > Department of Biotechnology > 1. Journal Articles
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