Whey protein-coated high oxygen barrier multilayer films using surface pretreated PET substrate

Eunmi Joo; Yoonjee Chang; Inyoung Choi; Seul Bi Lee; Dong Hoo Kim; Young Ju Choi; Chan Suk Yoon; Jaejoon Han

doi:10.1016/j.foodhyd.2018.01.027

Whey protein-coated high oxygen barrier multilayer films using surface pretreated PET substrate

Eunmi Joo, Yoonjee Chang, Inyoung Choi, Seul Bi Lee, Dong Hoo Kim, Young Ju Choi, Chan Suk Yoon, Jaejoon Han

Department of Biotechnology

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1-7
Number of pages	7
Journal	Food Hydrocolloids
Volume	80
DOIs	https://doi.org/10.1016/j.foodhyd.2018.01.027
Publication status	Published - 2018 Jul

Keywords

Corona discharge
Multilayer film
Plasma
Surface coating
Whey protein

ASJC Scopus subject areas

Food Science
Chemistry(all)
Chemical Engineering(all)

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10.1016/j.foodhyd.2018.01.027

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title = "Whey protein-coated high oxygen barrier multilayer films using surface pretreated PET substrate",

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.",

keywords = "Corona discharge, Multilayer film, Plasma, Surface coating, Whey protein",

author = "Eunmi Joo and Yoonjee Chang and Inyoung Choi and Lee, {Seul Bi} and Kim, {Dong Hoo} and Choi, {Young Ju} and Yoon, {Chan Suk} and Jaejoon Han",

note = "Funding Information: This research was supported by the High Value-added Food Technology Development Program of the Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) ( 315070-3 ). Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

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T1 - Whey protein-coated high oxygen barrier multilayer films using surface pretreated PET substrate

AU - Joo, Eunmi

AU - Chang, Yoonjee

AU - Choi, Inyoung

AU - Lee, Seul Bi

AU - Kim, Dong Hoo

AU - Choi, Young Ju

AU - Yoon, Chan Suk

AU - Han, Jaejoon

N1 - Funding Information: This research was supported by the High Value-added Food Technology Development Program of the Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) ( 315070-3 ). Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/7

Y1 - 2018/7

N2 - 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.

AB - 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.

KW - Corona discharge

KW - Multilayer film

KW - Plasma

KW - Surface coating

KW - Whey protein

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ER -

Whey protein-coated high oxygen barrier multilayer films using surface pretreated PET substrate

Abstract

Keywords

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