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Barrier packaging solutions from residual biomass: Synergetic properties of CNF and LCNF in films
KTH Royal Institute of Technology, Sweden; Aalto University, Finland.
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design. KTH Royal Institute of Technology, Sweden; SLU Swedish University of Agricultural Sciences, Sweden.ORCID iD: 0000-0002-0252-337x
2022 (English)In: Industrial crops and products (Print), ISSN 0926-6690, E-ISSN 1872-633X, Vol. 177, article id 114493Article in journal (Refereed) Published
Abstract [en]

In this paper, for the first time, it is studied the synergetic properties of two different grades of nanocelluloses with different chemical compositions (cellulose nanofibrils-CNF with less than 1% of lignin and lignocellulose nanofibrils-LCNF with 16% of lignin). CNF and LCNF were mixed in different ratios to obtain bi-component films. Their performance in terms of transparency, bioactivity, thermo-mechanical and gas barrier properties was evaluated and compared with the performance of the neat CNF films. The presence of LCNF in the formulations conferred antioxidant and UV blocking properties to the films, as well as improved mechanical and barrier properties. Specifically, the incorporation of 25% LCNF to the CNF films increased the mechanical properties (94% increase in tensile stress and a 414% increase in strain at break) and decreased the water vapor transmission rate by 16% and the oxygen transmission rate by 53%. This performance improvement was attributed to the coexistence of nanocelluloses with different chemical composition and morphology. LCNF contributed to increment the interfacial adhesion between cellulose nanofibrils due to the presence of lignin and promote the creation of more tortuous paths for gas molecules. These synergetic properties shown by the CNF/LCNF bi-component films demonstrate high potential to be used as gas barrier packaging solutions. © 2022 The Authors

Place, publisher, year, edition, pages
Elsevier B.V. , 2022. Vol. 177, article id 114493
Keywords [en]
1 lignin containing cellulose nanofibers (LCNF), 2 cellulose nanofibers (CNF), 3 gas barrier properties, 4 optical properties 5 antioxidant activity 6 mechanical properties, Antioxidants, Cellulose films, Lignin, Nanofibers, Optical properties, Strain, Tensile strength, 1 lignin containing cellulose nanofiber, 2 cellulose nanofiber, 3 gas barrier property, 4 optical property 5 antioxidant activity 6 mechanical property, Antioxidant activities, Cellulose nanofibers, Gas barrier properties, Performance, Synergetic properties, Nanocellulose, antioxidant, biomass, cellulose, chemical composition, film, nanoparticle, Barrier Properties, Gas, Packaging
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-59042DOI: 10.1016/j.indcrop.2021.114493Scopus ID: 2-s2.0-85122374613OAI: oai:DiVA.org:ri-59042DiVA, id: diva2:1653254
Note

 Funding details: Academy of Finland, AKA, 318890, 318891; Funding text 1: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Jon Trifol reports financial support was provided by Academy of Finland. Jon Trifol reports financial support was provided by AForsk.; Funding text 2: This research was supported by ÅForsk , project 18–316. JT acknowledges the Academy of Finland's Flagship Program under Projects No. 318890 and 318891 for its financial support.

Available from: 2022-04-21 Created: 2022-04-21 Last updated: 2022-04-21Bibliographically approved

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Moriana Torro, Rosana

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