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Water resistant nanopapers prepared by lactic acid modified cellulose nanofibers
Fibre and Particle Engineering Research Unit, University of Oulu.
Fibre and Particle Engineering Research Unit, University of Oulu.
Fibre and Particle Engineering Research Unit, University of Oulu.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Centre for Biocomposites and Biomaterials Processing, University of Toronto.
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2018 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 25, no 1, p. 259-268Article in journal (Refereed) Published
Abstract [en]

The current work reports a novel, completely water based approach to prepare the water resistant modified cellulose nanopapers. Lactic acid in aqueous medium was attached on cellulose nanofibers surface with the aid of ultra-sonication and later oligomerized (polymerized) by compression molding under high temperature and pressure, to obtain the modified nanopapers with enhanced mechanical properties. The modified nanopapers showed an increase of 32% in the elastic modulus and 30% in the yield strength over reference nanopapers. Additionally, the modified nanopaper was hydrophobic in nature and had superior storage modulus under moist conditions. The storage modulus of wet modified nanopaper was three times (2.4 GPa) compared to the reference nanopapers (0.8 GPa) after 1 h immersion in water. Finally, the thermal stability of the modified nanopaper was also higher than reference nanopaper. The material reported is 100% bio-based

Place, publisher, year, edition, pages
Springer, 2018. Vol. 25, no 1, p. 259-268
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-66623DOI: 10.1007/s10570-017-1540-2ISI: 000419902600021Scopus ID: 2-s2.0-85032958642OAI: oai:DiVA.org:ltu-66623DiVA, id: diva2:1158031
Note

Validerad;2018;Nivå 2;2018-02-02 (andbra)

Available from: 2017-11-17 Created: 2017-11-17 Last updated: 2018-07-18Bibliographically approved

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Sain, Mohini M.Oksman, Kristiina

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