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Application of Nanofibrillated Cellulose on BOPP/LDPE Film as Oxygen Barrier and Antimicrobial Coating Based on Cold Plasma Treatment

by 1,2,3, 1, 1 and 1,*
1
Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Institute of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
2
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education/Shandong Province, Qilu University of Technology, Jinan 250353, China
3
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
Coatings 2018, 8(6), 207; https://doi.org/10.3390/coatings8060207
Received: 19 April 2018 / Revised: 17 May 2018 / Accepted: 23 May 2018 / Published: 30 May 2018
The application of nanofibrillated cellulose (NC) films in packaging industry has been hindered by its lack of heat-sealing ability. Incorporation of NC films with the biaxially oriented polypropylene/low density polyethylene (BOPP/LDPE) laminates can take advantage of each material and endow the films with novel functions for food packaging applications. In this study, a coating that consists of NC and nisin was applied onto a cold plasma treated BOPP/LDPE film to fabricate a novel active packaging with an improved oxygen barrier performance and an added antimicrobial effect. The results showed that cold plasma treatment improved the surface hydrophilicity of BOPP/LDPE films for better attachment of the coatings. NC coatings significantly enhanced oxygen barrier property of the BOPP/LDPE film, with an oxygen transmission rate as low as 24.02 cc/m2·day as compared to that of the non-coated one (67.03 cc/m2·day). The addition of nisin in the coating at a concentration of 5 mg/g caused no significant change in barrier properties but imparted the film excellent antimicrobial properties, with a growth inhibition of L. monocytogenes by 94%. All films exhibit satisfying mechanical properties and transparency, and this new film has the potential to be used as antimicrobial and oxygen barrier packaging. View Full-Text
Keywords: nanofibrillated cellulose; nisin; BOPP/LDPE film; oxygen barrier; cold plasma; active packaging nanofibrillated cellulose; nisin; BOPP/LDPE film; oxygen barrier; cold plasma; active packaging
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MDPI and ACS Style

Lu, P.; Guo, M.; Xu, Z.; Wu, M. Application of Nanofibrillated Cellulose on BOPP/LDPE Film as Oxygen Barrier and Antimicrobial Coating Based on Cold Plasma Treatment. Coatings 2018, 8, 207.

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