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Barrier and mechanical properties of plasticized and cross-linked nanocellulose coatings for paper packaging applications
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-8909-3554
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4762-2854
2017 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 24, no 9, 3969-3980 p.Article in journal (Refereed) Published
Abstract [en]

Barrier, mechanical and thermal properties of porous paper substrates dip-coated with nanocellulose (NC) were studied. Sorbitol plasticizer was used to improve the toughness, and citric acid cross-linker to improve the moisture stability of the coatings. In general, the addition of sorbitol increased the barrier properties, maximum strength and toughness as well as the thermal stability of the samples when compared to the non-modified NC coatings. The barrier properties significantly improved, especially for plasticized NC coating’s, where the oxygen permeability value was as low as 0.7 mL μm day−1 m−2 kPa−1 at 49% RH and the water vapor permeability was reduced by 60%. Furthermore, we found that the cross-linked plasticized NC coating had a smoother surface (50% lower roughness) compared to non-modified ones. This study shows that the environmentally friendly additives sorbitol and citric acid had positive effects on NC coating properties, increasing its potential use in paper-based packaging applications.

Place, publisher, year, edition, pages
Springer, 2017. Vol. 24, no 9, 3969-3980 p.
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-65061DOI: 10.1007/s10570-017-1405-8ISI: 000407437000026OAI: oai:DiVA.org:ltu-65061DiVA: diva2:1131497
Note

Validerad;2017;Nivå 2;2017-08-17 (rokbeg)

Available from: 2017-08-14 Created: 2017-08-14 Last updated: 2017-11-24Bibliographically approved

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