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High-strength, High-toughness Aligned Polymer-based Nanocomposite Reinforced with Ultra-low Weight Fraction of Functionalized Nanocellulose
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-1776-2725
Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology.
Division of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Fibre and Particle Engineering, University of Oulu.ORCID iD: 0000-0003-4762-2854
2018 (English)In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 19, no 10, p. 4075-4083Article in journal (Refereed) Published
Abstract [en]

Multifunctional lightweight, flexible, yet strong polymer-based nanocomposites are highly desired for specific applications. However, the control of orientation and dispersion of reinforcing nanoparticles and the optimization of the interfacial interaction still pose substantial challenges in nanocellulose-reinforced polymer composites. In this study, poly(ethylene glycol)-grafted nanocellulose fibers (TOCNF-g-PEG) has demonstrated much better dispersion in a poly(lactic acid) (PLA) matrix as compared to unmodified nanocellulose fibers. Through a uniaxial drawing method, aligned PLA/nanocellulose nanocomposites with high strength, high toughness, and unique optical behavior are obtained. With the incorporation of only 0.1 wt% of TOCNF-g-PEG in PLA, the ultimate strength of the nanocomposite reaches 343 MPa, which is significantly higher than that of other aligned PLA-based nanocomposites reported previously. Compared with the aligned nanocomposite reinforced with unmodified nanocellulose, the ultimate strength and toughness are enhanced by 39% and 70%, respectively. Moreover, the aligned nanocomposite film is highly transparent and possesses an anisotropic light scattering effect, revealing its significant potential for optical applications.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018. Vol. 19, no 10, p. 4075-4083
Keywords [en]
nanocellulose, nanocomposite, alignment, mechanical characteristics, light scattering
National Category
Composite Science and Engineering Nano Technology Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-70591DOI: 10.1021/acs.biomac.8b01086ISI: 000447118500018PubMedID: 30130395Scopus ID: 2-s2.0-85053301832OAI: oai:DiVA.org:ltu-70591DiVA, id: diva2:1241947
Funder
Knut and Alice Wallenberg FoundationBio4Energy
Note

Validerad;2018;Nivå 2;2018-10-29 (johcin) 

Available from: 2018-08-27 Created: 2018-08-27 Last updated: 2019-10-09Bibliographically approved

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Geng, ShiyuOksman, Kristiina

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