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Synergies between Fibrillated Nanocellulose and Hot-Pressing of Papers Obtained from High-Yield Pulp
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).ORCID iD: 0000-0002-8483-8374
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).
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2023 (English)In: Nanomaterials, E-ISSN 2079-4991, Vol. 13, no 13, article id 1931Article in journal (Refereed) Published
Abstract [en]

To extend the application of cost-effective high-yield pulps in packaging, strength and barrier properties are improved by advanced-strength additives or by hot-pressing. The aim of this study is to assess the synergic effects between the two approaches by using nanocellulose as a bulk additive, and by hot-pressing technology. Due to the synergic effect, dry strength increases by 118% while individual improvements are 31% by nanocellulose and 92% by hot-pressing. This effect is higher for mechanical fibrillated cellulose. After hot-pressing, all papers retain more than 22% of their dry strength. Hot-pressing greatly increases the paper’s ability to withstand compressive forces applied in short periods of time by 84%, with a further 30% increase due to the synergic effect of the fibrillated nanocellulose. Hot-pressing and the fibrillated cellulose greatly decrease air permeability (80% and 68%, respectively) for refining pretreated samples, due to the increased fiber flexibility, which increase up to 90% using the combined effect. The tear index increases with the addition of nanocellulose, but this effect is lost after hot-pressing. In general, fibrillation degree has a small effect which means that low- cost nanocellulose could be used in hot-pressed papers, providing products with a good strength and barrier capacity. 

Place, publisher, year, edition, pages
MDPI, 2023. Vol. 13, no 13, article id 1931
Keywords [en]
cellulose nanofibers, CTMP, high-yield pulp, hot-pressing technology, microcellulose, nanocellulose, packaging, paper quality
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:miun:diva-49037DOI: 10.3390/nano13131931ISI: 001028321900001Scopus ID: 2-s2.0-85164693722OAI: oai:DiVA.org:miun-49037DiVA, id: diva2:1788014
Available from: 2023-08-15 Created: 2023-08-15 Last updated: 2023-08-16Bibliographically approved

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Pettersson, GunillaMattsson, AmandaNyström, StaffanEngstrand, Per

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