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Aligned biodegradable cellulose-reinforced nanocomposites with high strength and toughness
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-1776-2725
Division of Glycoscience, School of Biotechnology, Royal Institute of Technology, SE-100 44, Stockholm, Sweden.
Luleå University of Technology.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-4254-5020
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2017 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

Cellulose, as the most abundant component in wood, has attracted a lot of attention for utilizing it in environmentally-friendly applications to replace the fossil-based materials. Nanocellulose materials with high stiffness and strength, large surface area and biodegradability, are promising reinforcement in polymers. However, the energy consumption of nano-scale isolation of cellulose and the dispersion of nanocellulose materials in the polymers are still challenging for obtaining low-cost and ultra-strong nanocomposites. To overcome these, we focus on investigating the aligned nanocomposites reinforced by a very low cellulose nanofibers (CNF) content (0.1 wt%), and grafting polyethylene glycol (PEG) on CNF was performed to improve the dispersion of them. We found that the alignment can improve mechanical properties of the polylactic acid (PLA)/CNF composites dramatically. With a draw ratio of 8, the strength of the aligned composite reached 320 MPa and the toughness was 30 times enhanced compared to the isotropic material. Much better dispersion of the CNF grafted with PEG in PLA matrix was confirmed by scanning electron microscopy (SEM) compared to the ungrafted CNF, and further supported by the mechanical testing results. Furthermore, the aligned nanocomposites exhibited light scattering behavior indicating they have the potential to be used in optical applications.

Place, publisher, year, edition, pages
2017.
National Category
Biomaterials Science Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-68471OAI: oai:DiVA.org:ltu-68471DiVA, id: diva2:1200168
Conference
Marcus Wallenberg Prize (MWP) Event 2017 – Young Researchers’ Challenge; October 24–27, 2017, Stockholm, Sweden
Available from: 2018-04-23 Created: 2018-04-23 Last updated: 2018-05-03Bibliographically approved

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fulltext(1373 kB)13 downloads
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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