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UV-Cured Cellulose Nanofiber Composites with Moisture Durable Oxygen Barrier Properties
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Biocomposites. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
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2014 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 131, no 16, 40604- p.Article in journal (Refereed) Published
Abstract [en]

Nanocomposites based on 10 to 60 vol % cellulose nanofibers (NFC) in a photopolymerizable hyperbranched acrylate matrix were prepared. Unmodified NFC and NFC chemically modified with a silane coupling agent and with ceric ammonium nitrate for direct polymer grafting from the cellulose surface were used. A homogeneous dispersion of NFC in the matrix was obtained in each case, leading to a marked improvement in oxygen barrier (up to nine times) and thermomechanical properties (storage modulus increased up to seven times). The mechanisms involved in the permeability reduction were investigated, revealing non-monotonic trends in the evolution of the solubility and diffusion coefficients with NFC content. Most significantly, the inherent moisture sensitivity of the oxygen permeability of the NFC was found to be drastically reduced when it was dispersed in the polymer matrix, particularly after chemical modification, underlining the promise of the present approach for the production of robust, high barrier organic films.

Place, publisher, year, edition, pages
2014. Vol. 131, no 16, 40604- p.
Keyword [en]
cellulose and other wood products, mechanical properties, nanoparticles, nanowires and nanocrystals, photopolymerization, surfaces and interfaces
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-147394DOI: 10.1002/app.40604ISI: 000336453600010Scopus ID: 2-s2.0-84901200859OAI: oai:DiVA.org:kth-147394DiVA: diva2:731819
Funder
Knut and Alice Wallenberg Foundation
Note

QC 20140702

Available from: 2014-07-02 Created: 2014-06-27 Last updated: 2017-12-05Bibliographically approved

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Berglund, Lars A.

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CiteExportLink to record
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